Merge pull request '0.3.0' (!23) from dev into main

Reviewed-on: #23

.github/workflows/build.yml

@@ -0,0 +1,22 @@
+name: Gradle build
+
+on:
+  push:
+    branches: [ dev ]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v4.1.7
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4.2.1
+        with:
+          java-version: 17
+          distribution: liberica
+      - name: execute build
+        uses: gradle/gradle-build-action@v3.4.2
+        with:
+          arguments: build

.github/workflows/pages.yml

@@ -0,0 +1,39 @@
+name: Dokka publication
+
+on:
+  push:
+    branches: [ main ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+jobs:
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: 17
+          distribution: liberica
+      - name: execute build
+        uses: gradle/gradle-build-action@v3
+        with:
+          arguments: dokkaHtmlMultiModule
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: 'build/dokka/htmlMultiModule'
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.github/workflows/publish.yml

@@ -0,0 +1,27 @@
+name: Gradle publish
+
+on:
+  workflow_dispatch:
+  release:
+    types: [ created ]
+
+jobs:
+  publish:
+    environment:
+      name: publish
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4.1.7
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4.2.1
+        with:
+          java-version: 17
+          distribution: liberica
+      - name: execute build
+        uses: gradle/gradle-build-action@v3.4.2
+      - name: Publish
+        shell: bash
+        run: >
+          ./gradlew release --no-daemon --build-cache -Ppublishing.enabled=true
+          -Ppublishing.space.user=${{ secrets.SPACE_APP_ID }}
+          -Ppublishing.space.token=${{ secrets.SPACE_APP_SECRET }}

.gitignore

@@ -1,6 +1,7 @@
 build/
 .gradle/
 .idea/
+.kotlin
 /*.iml
 
 mapCache/

.space.kts

@@ -1,25 +1,25 @@
 import kotlin.io.path.readText
 
 job("Build") {
-    gradlew("openjdk:11", "build")
+    gradlew("spc.registry.jetbrains.space/p/sci/containers/kotlin-ci:1.0.3", "build")
 }
 
 job("Publish") {
     startOn {
         gitPush { enabled = false }
     }
-    container("openjdk:11") {
-        env["SPACE_USER"] = Secrets("space_user")
-        env["SPACE_TOKEN"] = Secrets("space_token")
+    container("spc.registry.jetbrains.space/p/sci/containers/kotlin-ci:1.0.3") {
+        env["SPACE_USER"] = "{{ project:space_user }}"
+        env["SPACE_TOKEN"] = "{{ project:space_token }}"
         kotlinScript { api ->
 
             val spaceUser = System.getenv("SPACE_USER")
             val spaceToken = System.getenv("SPACE_TOKEN")
 
-            // write version to the build directory
+            // write the version to the build directory
             api.gradlew("version")
 
-            //read version from build file
+            //read the version from build file
             val version = java.nio.file.Path.of("build/project-version.txt").readText()
 
             val revisionSuffix = if (version.endsWith("SNAPSHOT")) {
@@ -32,7 +32,7 @@ job("Publish") {
                 project = api.projectIdentifier(),
                 targetIdentifier = TargetIdentifier.Key("maps-kt"),
                 version = version+revisionSuffix,
-                // automatically update deployment status based on a status of a job
+                // automatically update deployment status based on the status of a job
                 syncWithAutomationJob = true
             )
             api.gradlew(

CHANGELOG.md

@@ -0,0 +1,32 @@
+# Changelog
+
+## Unreleased
+
+### Added
+- `alpha` extension for feature attribute builder
+- PNG export
+
+### Changed
+- avoid drawing features with VisibleAttribute false
+- Move SVG export to `features` and make it usable for maps as well
+
+### Deprecated
+
+### Removed
+
+### Fixed
+- Add alpha attribute comprehension for all standard features.
+- Package name for SerializeableAttribute
+
+### Security
+
+## 0.3.0 - 2024-06-04
+
+### Changed
+
+- Package changed to `space.kscience`
+- Kotlin 2.0
+
+### Fixed
+
+- Use of generated resources for Wasm

README.md

@@ -1 +1,69 @@
-This repository is a work-in-progress implementation of Map-with-markers component for Compose-Multiplatform
+# Maps-kt
+
+This repository is a work-in-progress implementation of Map-with-markers component for Compose-Multiplatform
+
+![](docs/images/Screenshot%202023-01-12%20110429.png)
+
+## Modules
+
+
+### [demo](demo)
+>
+> **Maturity**: EXPERIMENTAL
+
+### [maps-kt-compose](maps-kt-compose)
+> Compose-multiplaform implementation for web-mercator tiled maps
+>
+> **Maturity**: EXPERIMENTAL
+>
+> **Features:**
+> - [osm](maps-kt-compose/#) : OpenStreetMap tile provider.
+
+
+### [maps-kt-core](maps-kt-core)
+> Core cartography, UI-agnostic
+>
+> **Maturity**: DEVELOPMENT
+>
+> **Features:**
+> - [angles and distances](maps-kt-core/#) : Type-safe angle and distance measurements.
+> - [ellipsoid](maps-kt-core/#) : Ellipsoid geometry and distances
+> - [mercator](maps-kt-core/#) : Mercator and web-mercator projections
+
+
+### [maps-kt-features](maps-kt-features)
+>
+> **Maturity**: EXPERIMENTAL
+
+### [maps-kt-geojson](maps-kt-geojson)
+>
+> **Maturity**: EXPERIMENTAL
+
+### [maps-kt-scheme](maps-kt-scheme)
+>
+> **Maturity**: EXPERIMENTAL
+
+### [trajectory-kt](trajectory-kt)
+> Path and trajectory optimization
+>
+> **Maturity**: EXPERIMENTAL
+
+### [demo/maps](demo/maps)
+>
+> **Maturity**: EXPERIMENTAL
+
+### [demo/maps-wasm](demo/maps-wasm)
+>
+> **Maturity**: EXPERIMENTAL
+
+### [demo/polygon-editor](demo/polygon-editor)
+>
+> **Maturity**: EXPERIMENTAL
+
+### [demo/scheme](demo/scheme)
+>
+> **Maturity**: EXPERIMENTAL
+
+### [demo/trajectory-playground](demo/trajectory-playground)
+>
+> **Maturity**: EXPERIMENTAL

build.gradle.kts

@@ -1,90 +1,40 @@
+import space.kscience.gradle.useApache2Licence
+import space.kscience.gradle.useSPCTeam
+
 plugins {
-    base
+    id("space.kscience.gradle.project")
 }
 
-val ktorVersion by extra("2.0.3")
+val kmathVersion: String by extra("0.4.0")
 
 allprojects {
-    group = "center.sciprog"
-    version = "0.1.0-SNAPSHOT"
+    group = "space.kscience"
+    version = "0.4.0-dev-3"
+
+    repositories {
+        mavenLocal()
+        maven("https://repo.kotlin.link")
+    }
 }
 
-tasks.create("version") {
-    group = "publishing"
-    val versionFile = project.buildDir.resolve("project-version.txt")
-    outputs.file(versionFile)
-    doLast {
-        versionFile.createNewFile()
-        versionFile.writeText(project.version.toString())
-        println(project.version)
+ksciencePublish {
+    pom("https://github.com/SciProgCentre/maps-kt") {
+        useApache2Licence()
+        useSPCTeam()
     }
+    repository("spc","https://maven.sciprog.center/kscience")
+    sonatype("https://oss.sonatype.org")
 }
 
 subprojects {
     repositories {
         google()
         mavenCentral()
+        maven("https://repo.kotlin.link")
         maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
     }
-
-    plugins.withId("maven-publish") {
-
-        configure<PublishingExtension> {
-            val vcs = "https://github.com/mipt-npm/maps-kt"
-
-            // Process each publication we have in this project
-            publications {
-                withType<MavenPublication> {
-                    pom {
-                        name.set(project.name)
-                        description.set(project.description)
-                        url.set(vcs)
-
-                        licenses {
-                            license {
-                                name.set("The Apache Software License, Version 2.0")
-                                url.set("https://www.apache.org/licenses/LICENSE-2.0.txt")
-                                distribution.set("repo")
-                            }
-                        }
-
-                        developers {
-                            developer {
-                                id.set("SPC")
-                                name.set("Scientific programming centre")
-                                organization.set("MIPT")
-                                organizationUrl.set("https://sciprog.center/")
-                            }
-                        }
-
-                        scm {
-                            url.set(vcs)
-                            tag.set(project.version.toString())
-                        }
-                    }
-                }
-            }
-
-            val spaceRepo = "https://maven.pkg.jetbrains.space/mipt-npm/p/sci/maven"
-            val spaceUser: String? = project.findProperty("publishing.space.user") as? String
-            val spaceToken: String? = project.findProperty("publishing.space.token") as? String
-
-            if (spaceUser != null && spaceToken != null) {
-                project.logger.info("Adding mipt-npm Space publishing to project [${project.name}]")
-
-                repositories.maven {
-                    name = "space"
-                    url = uri(spaceRepo)
-
-                    credentials {
-                        username = spaceUser
-                        password = spaceToken
-                    }
-                }
-            }
-        }
-    }
 }
 
+readme.readmeTemplate = file("docs/templates/README-TEMPLATE.md")
 
 

demo/README.md

@@ -0,0 +1,4 @@
+# Module demo
+
+
+

demo/build.gradle.kts

@@ -1,40 +0,0 @@
-import org.jetbrains.compose.compose
-import org.jetbrains.compose.desktop.application.dsl.TargetFormat
-
-plugins {
-    kotlin("multiplatform")
-    id("org.jetbrains.compose")
-}
-
-val ktorVersion: String by rootProject.extra
-
-kotlin {
-    jvm {
-        compilations.all {
-            kotlinOptions.jvmTarget = "11"
-        }
-        withJava()
-    }
-    sourceSets {
-        val jvmMain by getting {
-            dependencies {
-                implementation(projects.mapsKtCompose)
-                implementation(compose.desktop.currentOs)
-                implementation("io.ktor:ktor-client-cio:$ktorVersion")
-                implementation("ch.qos.logback:logback-classic:1.2.11")
-            }
-        }
-        val jvmTest by getting
-    }
-}
-
-compose.desktop {
-    application {
-        mainClass = "MainKt"
-        nativeDistributions {
-            targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
-            packageName = "maps-kt-compose"
-            packageVersion = "1.0.0"
-        }
-    }
-}

demo/maps-wasm/README.md

@@ -0,0 +1,4 @@
+# Module maps-wasm
+
+
+

demo/maps-wasm/build.gradle.kts

@@ -0,0 +1,37 @@
+import org.jetbrains.kotlin.gradle.targets.js.dsl.ExperimentalWasmDsl
+
+plugins {
+    kotlin("multiplatform")
+    alias(spclibs.plugins.compose.compiler)
+    alias(spclibs.plugins.compose.jb)
+}
+
+//val ktorVersion: String by rootProject.extra
+
+kotlin {
+    @OptIn(ExperimentalWasmDsl::class)
+    wasmJs {
+        browser()
+        binaries.executable()
+    }
+    sourceSets {
+        commonMain {
+            dependencies {
+                @OptIn(org.jetbrains.compose.ExperimentalComposeLibrary::class)
+                api(compose.components.resources)
+            }
+        }
+
+        wasmJsMain {
+            dependencies {
+                implementation(projects.mapsKtScheme)
+            }
+        }
+    }
+}
+
+compose {
+    web {
+
+    }
+}

demo/maps-wasm/src/wasmJsMain/kotlin/Main.kt

@@ -0,0 +1,82 @@
+@file:OptIn(ExperimentalResourceApi::class, ExperimentalComposeUiApi::class)
+
+import androidx.compose.runtime.*
+import androidx.compose.ui.ExperimentalComposeUiApi
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.window.CanvasBasedWindow
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
+import org.jetbrains.compose.resources.ExperimentalResourceApi
+import org.jetbrains.compose.resources.painterResource
+import space.kscience.kmath.geometry.Angle
+import space.kscience.maps.features.FeatureStore
+import space.kscience.maps.features.ViewConfig
+import space.kscience.maps.features.ViewPoint
+import space.kscience.maps.features.color
+import space.kscience.maps.scheme.*
+import space.kscience.maps_wasm.generated.resources.Res
+import space.kscience.maps_wasm.generated.resources.middle_earth
+
+
+@Composable
+fun App() {
+
+    val scope = rememberCoroutineScope()
+
+
+    val features = FeatureStore.remember(XYCoordinateSpace) {
+        background(1600f, 1200f) {
+            painterResource(Res.drawable.middle_earth)
+        }
+        circle(410.52737 to 868.7676).color(Color.Blue)
+        text(410.52737 to 868.7676, "Shire").color(Color.Blue)
+        circle(1132.0881 to 394.99127).color(Color.Red)
+        text(1132.0881 to 394.99127, "Ordruin").color(Color.Red)
+        arc(center = 1132.0881 to 394.99127, radius = 20f, startAngle = Angle.zero, Angle.piTimes2)
+
+        //circle(410.52737 to 868.7676, id = "hobbit")
+
+        scope.launch {
+            var t = 0.0
+            while (isActive) {
+                val x = 410.52737 + t * (1132.0881 - 410.52737)
+                val y = 868.7676 + t * (394.99127 - 868.7676)
+                circle(x to y, id = "hobbit").color(Color.Green)
+                delay(100)
+                t += 0.005
+                if (t >= 1.0) t = 0.0
+            }
+        }
+    }
+
+    val initialViewPoint: ViewPoint<XY> = remember {
+        features.getBoundingBox(1f)?.computeViewPoint() ?: XYViewPoint(XY(0f, 0f))
+    }
+
+    var viewPoint: ViewPoint<XY> by remember { mutableStateOf(initialViewPoint) }
+
+    val mapState: XYCanvasState = XYCanvasState.remember(
+        ViewConfig(
+            onClick = { _, click ->
+                println("${click.focus.x}, ${click.focus.y}")
+            },
+            onViewChange = { viewPoint = this }
+        ),
+        initialViewPoint = initialViewPoint,
+    )
+
+    SchemeView(
+        mapState,
+        features,
+    )
+
+}
+
+
+fun main() {
+//    renderComposable(rootElementId = "root") {
+    CanvasBasedWindow("Maps demo", canvasElementId = "ComposeTarget") {
+        App()
+    }
+}

demo/maps-wasm/src/wasmJsMain/resources/index.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Compose App</title>
+    <script type="application/javascript" src="skiko.js"></script>
+    <script type="application/javascript" src="maps-wasm.js"></script>
+</head>
+<body>
+<canvas id="ComposeTarget"></canvas>
+</body>
+</html>

demo/maps/README.md

@@ -0,0 +1,4 @@
+# Module maps
+
+
+

demo/maps/api/maps.api

@@ -0,0 +1,18 @@
+public final class ComposableSingletons$MainKt {
+	public static final field INSTANCE LComposableSingletons$MainKt;
+	public static field lambda-1 Lkotlin/jvm/functions/Function2;
+	public static field lambda-2 Lkotlin/jvm/functions/Function3;
+	public static field lambda-3 Lkotlin/jvm/functions/Function3;
+	public fun <init> ()V
+	public final fun getLambda-1$maps ()Lkotlin/jvm/functions/Function2;
+	public final fun getLambda-2$maps ()Lkotlin/jvm/functions/Function3;
+	public final fun getLambda-3$maps ()Lkotlin/jvm/functions/Function3;
+}
+
+public final class MainKt {
+	public static final fun App (Landroidx/compose/runtime/Composer;I)V
+	public static final fun main ()V
+	public static synthetic fun main ([Ljava/lang/String;)V
+	public static final fun toShortString (Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;)Ljava/lang/String;
+}
+

demo/maps/build.gradle.kts

@@ -0,0 +1,39 @@
+import org.jetbrains.compose.desktop.application.dsl.TargetFormat
+
+plugins {
+    kotlin("multiplatform")
+    alias(spclibs.plugins.compose.compiler)
+    alias(spclibs.plugins.compose.jb)
+}
+
+val ktorVersion: String by rootProject.extra
+
+kotlin {
+    jvmToolchain(11)
+    jvm()
+    sourceSets {
+        val jvmMain by getting {
+            dependencies {
+                implementation(projects.mapsKtCompose)
+                implementation(projects.mapsKtGeojson)
+                implementation(compose.desktop.currentOs)
+                implementation("io.ktor:ktor-client-cio")
+                implementation(spclibs.logback.classic)
+            }
+        }
+        val jvmTest by getting
+    }
+}
+
+compose {
+    desktop {
+        application {
+            mainClass = "MainKt"
+            nativeDistributions {
+                targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
+                packageName = "maps-compose-demo"
+                packageVersion = "1.0.0"
+            }
+        }
+    }
+}

demo/maps/src/jvmMain/kotlin/Main.kt

@@ -0,0 +1,192 @@
+import androidx.compose.desktop.ui.tooling.preview.Preview
+import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.PointerMatcher
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Home
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.unit.DpSize
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.window.Window
+import androidx.compose.ui.window.application
+import io.ktor.client.HttpClient
+import io.ktor.client.engine.cio.CIO
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.filterNotNull
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
+import space.kscience.attributes.Attributes
+import space.kscience.kmath.geometry.Angle
+import space.kscience.kmath.geometry.degrees
+import space.kscience.kmath.geometry.radians
+import space.kscience.maps.compose.*
+import space.kscience.maps.coordinates.GeodeticMapCoordinates
+import space.kscience.maps.coordinates.Gmc
+import space.kscience.maps.coordinates.kilometers
+import space.kscience.maps.features.*
+import space.kscience.maps.geojson.geoJson
+import java.nio.file.Path
+import kotlin.math.PI
+import kotlin.random.Random
+
+public fun GeodeticMapCoordinates.toShortString(): String =
+    "${(latitude.toDegrees().value).toString().take(6)}:${(longitude.toDegrees().value).toString().take(6)}"
+
+
+@OptIn(ExperimentalFoundationApi::class)
+@Composable
+@Preview
+fun App() {
+    MaterialTheme {
+
+        val scope = rememberCoroutineScope()
+
+        val mapTileProvider = remember {
+            OpenStreetMapTileProvider(
+                client = HttpClient(CIO),
+                cacheDirectory = Path.of("mapCache")
+            )
+        }
+
+        val centerCoordinates = MutableStateFlow<Gmc?>(null)
+
+        val pointOne = 55.568548 to 37.568604
+        val pointTwo = 55.929444 to 37.518434
+//        val pointThree = 60.929444 to 37.518434
+
+        MapView(
+            mapTileProvider = mapTileProvider,
+            config = ViewConfig(
+                onViewChange = { centerCoordinates.value = focus },
+                onClick = { _, viewPoint ->
+                    println(viewPoint)
+                }
+            )
+        ) {
+
+            geoJson(javaClass.getResource("/moscow.geo.json")!!)
+                .color(Color.Blue)
+                .alpha(0.4f)
+
+            icon(pointOne, Icons.Filled.Home)
+
+            val marker1 = rectangle(55.744 to 38.614, size = DpSize(10.dp, 10.dp))
+                .color(Color.Magenta)
+            val marker2 = rectangle(55.8 to 38.5, size = DpSize(10.dp, 10.dp))
+                .color(Color.Magenta)
+            val marker3 = rectangle(56.0 to 38.5, size = DpSize(10.dp, 10.dp))
+                .color(Color.Magenta)
+
+            draggableLine(marker1, marker2, id = "line 1").color(Color.Red).onClick {
+                println("line 1 clicked")
+            }
+            draggableLine(marker2, marker3, id = "line 2").color(Color.DarkGray).onClick {
+                println("line 2 clicked")
+            }
+            draggableLine(marker3, marker1, id = "line 3").color(Color.Blue).onClick {
+                println("line 3 clicked")
+            }
+
+
+            multiLine(
+                points = listOf(
+                    55.742465 to 37.615812,
+                    55.742713 to 37.616370,
+                    55.742815 to 37.616659,
+                    55.742320 to 37.617132,
+                    55.742086 to 37.616566,
+                    55.741715 to 37.616716
+                ),
+            )
+
+//            points(
+//                points = listOf(
+//                    55.744 to 38.614,
+//                    55.8 to 38.5,
+//                    56.0 to 38.5,
+//                )
+//            ).pointSize(5f)
+
+//            geodeticLine(Gmc.ofDegrees(40.7128, -74.0060), Gmc.ofDegrees(55.742465, 37.615812)).color(Color.Blue)
+//            line(Gmc.ofDegrees(40.7128, -74.0060), Gmc.ofDegrees(55.742465, 37.615812))
+
+
+            //remember feature ref
+            val circleId = circle(
+                centerCoordinates = pointTwo,
+            )
+            scope.launch {
+                while (isActive) {
+                    delay(200)
+                    circleId.color(Color(Random.nextFloat(), Random.nextFloat(), Random.nextFloat()))
+                }
+            }
+
+
+//            draw(position = pointThree) {
+//                drawLine(start = Offset(-10f, -10f), end = Offset(10f, 10f), color = Color.Red)
+//                drawLine(start = Offset(-10f, 10f), end = Offset(10f, -10f), color = Color.Red)
+//            }
+
+            arc(pointOne, 10.0.kilometers, (PI / 4).radians, -Angle.pi / 2)
+
+
+            line(pointOne, pointTwo, id = "line")
+            text(pointOne, "Home", font = { size = 32f })
+
+
+            pixelMap(
+                space.Rectangle(
+                    Gmc(latitude = 55.58461879539754.degrees, longitude = 37.8746197303493.degrees),
+                    Gmc(latitude = 55.442792937592415.degrees, longitude = 38.132240805463844.degrees)
+                ),
+                0.005.degrees,
+                0.005.degrees
+            ) { gmc ->
+                Color(
+                    red = ((gmc.latitude + Angle.piDiv2).toDegrees().value * 10 % 1f).toFloat(),
+                    green = ((gmc.longitude + Angle.pi).toDegrees().value * 10 % 1f).toFloat(),
+                    blue = 0f,
+                    alpha = 0.3f
+                )
+            }
+
+            centerCoordinates.filterNotNull().onEach {
+                group(id = "center") {
+                    circle(center = it, id = "circle", size = 1.dp).color(Color.Blue)
+                    text(position = it, it.toShortString(), id = "text").color(Color.Blue)
+                }
+            }.launchIn(scope)
+
+            //Add click listeners for all polygons
+            forEachWithType<Gmc, PolygonFeature<Gmc>> { ref, polygon: PolygonFeature<Gmc> ->
+                ref.onClick(PointerMatcher.Primary) {
+                    println("Click on $ref")
+                    //draw in top-level scope
+                    with(this@MapView) {
+                        multiLine(
+                            polygon.points,
+                            attributes = Attributes(ZAttribute, 10f),
+                            id = "selected",
+                        ).modifyAttribute(StrokeAttribute, 4f).color(Color.Magenta)
+                    }
+                }
+            }
+//            println(toPrettyString())
+        }
+    }
+}
+
+
+fun main() = application {
+    Window(onCloseRequest = ::exitApplication, title = "Maps-kt demo", icon = painterResource("SPC-logo.png")) {
+        App()
+    }
+}

demo/polygon-editor/README.md

@@ -0,0 +1,4 @@
+# Module polygon-editor
+
+
+

demo/polygon-editor/api/polygon-editor.api

@@ -0,0 +1,19 @@
+public final class ComposableSingletons$MainKt {
+	public static final field INSTANCE LComposableSingletons$MainKt;
+	public static field lambda-1 Lkotlin/jvm/functions/Function3;
+	public static field lambda-2 Lkotlin/jvm/functions/Function2;
+	public static field lambda-3 Lkotlin/jvm/functions/Function3;
+	public static field lambda-4 Lkotlin/jvm/functions/Function3;
+	public fun <init> ()V
+	public final fun getLambda-1$polygon_editor ()Lkotlin/jvm/functions/Function3;
+	public final fun getLambda-2$polygon_editor ()Lkotlin/jvm/functions/Function2;
+	public final fun getLambda-3$polygon_editor ()Lkotlin/jvm/functions/Function3;
+	public final fun getLambda-4$polygon_editor ()Lkotlin/jvm/functions/Function3;
+}
+
+public final class MainKt {
+	public static final fun App (Landroidx/compose/runtime/Composer;I)V
+	public static final fun main ()V
+	public static synthetic fun main ([Ljava/lang/String;)V
+}
+

demo/polygon-editor/build.gradle.kts

@@ -0,0 +1,37 @@
+import org.jetbrains.compose.desktop.application.dsl.TargetFormat
+
+plugins {
+    kotlin("multiplatform")
+    alias(spclibs.plugins.compose.compiler)
+    alias(spclibs.plugins.compose.jb)
+}
+
+val ktorVersion: String by rootProject.extra
+
+kotlin {
+    jvm()
+    jvmToolchain(11)
+    sourceSets {
+        val jvmMain by getting {
+            dependencies {
+                implementation(projects.mapsKtScheme)
+                implementation(compose.desktop.currentOs)
+                implementation("ch.qos.logback:logback-classic:1.2.11")
+            }
+        }
+        val jvmTest by getting
+    }
+}
+
+compose{
+    desktop {
+        application {
+            mainClass = "MainKt"
+            nativeDistributions {
+                targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
+                packageName = "polygon-editor-demo"
+                packageVersion = "1.0.0"
+            }
+        }
+    }
+}

demo/polygon-editor/src/jvmMain/kotlin/Main.kt

@@ -0,0 +1,81 @@
+// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+import androidx.compose.desktop.ui.tooling.preview.Preview
+import androidx.compose.material.CursorDropdownMenu
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Text
+import androidx.compose.material.TextButton
+import androidx.compose.runtime.*
+import androidx.compose.runtime.snapshots.SnapshotStateList
+import androidx.compose.ui.input.pointer.isSecondaryPressed
+import androidx.compose.ui.window.Window
+import androidx.compose.ui.window.application
+import space.kscience.maps.features.*
+import space.kscience.maps.scheme.SchemeView
+import space.kscience.maps.scheme.XY
+import space.kscience.maps.scheme.XYCanvasState
+import space.kscience.maps.scheme.XYCoordinateSpace
+
+@Composable
+@Preview
+fun App() {
+    MaterialTheme {
+
+        var clickPoint by remember { mutableStateOf<XY?>(null) }
+
+        val myPolygon: SnapshotStateList<XY> = remember { mutableStateListOf<XY>() }
+
+        val featureState = FeatureStore.remember(XYCoordinateSpace) {
+            multiLine(
+                listOf(XY(0f, 0f), XY(0f, 1f), XY(1f, 1f), XY(1f, 0f), XY(0f, 0f)),
+                id = "frame"
+            )
+        }
+
+        val mapState: XYCanvasState = XYCanvasState.remember(
+            config = ViewConfig<XY>(
+                onClick = { event, point ->
+                    if (event.buttons.isSecondaryPressed) {
+                        clickPoint = point.focus
+                    }
+                }
+            ),
+            initialRectangle = featureState.getBoundingBox(1f),
+        )
+
+        CursorDropdownMenu(clickPoint != null, { clickPoint = null }) {
+            clickPoint?.let { point ->
+                TextButton({
+                    myPolygon.add(point)
+                    if (myPolygon.isNotEmpty()) {
+                        featureState.group(id = "polygon") {
+                            val pointRefs = myPolygon.mapIndexed { index, xy ->
+                                circle(xy, id = "point[$index]").draggable { _, to ->
+                                    myPolygon[index] = to.focus
+                                }
+                            }
+                            draggableMultiLine(
+                                pointRefs + pointRefs.first(),
+                                "line"
+                            )
+                        }
+                    }
+                    clickPoint = null
+                }) {
+                    Text("Create node")
+                }
+            }
+        }
+
+        SchemeView(
+            mapState,
+            featureState,
+        )
+
+    }
+}
+
+fun main() = application {
+    Window(title = "Polygon editor demo", onCloseRequest = ::exitApplication) {
+        App()
+    }
+}

demo/scheme/README.md

@@ -0,0 +1,4 @@
+# Module scheme
+
+
+

demo/scheme/api/scheme.api

@@ -0,0 +1,17 @@
+public final class ComposableSingletons$MainKt {
+	public static final field INSTANCE LComposableSingletons$MainKt;
+	public static field lambda-1 Lkotlin/jvm/functions/Function2;
+	public static field lambda-2 Lkotlin/jvm/functions/Function3;
+	public static field lambda-3 Lkotlin/jvm/functions/Function3;
+	public fun <init> ()V
+	public final fun getLambda-1$scheme ()Lkotlin/jvm/functions/Function2;
+	public final fun getLambda-2$scheme ()Lkotlin/jvm/functions/Function3;
+	public final fun getLambda-3$scheme ()Lkotlin/jvm/functions/Function3;
+}
+
+public final class MainKt {
+	public static final fun App (Landroidx/compose/runtime/Composer;I)V
+	public static final fun main ()V
+	public static synthetic fun main ([Ljava/lang/String;)V
+}
+

demo/scheme/build.gradle.kts

@@ -0,0 +1,38 @@
+import org.jetbrains.compose.desktop.application.dsl.TargetFormat
+
+plugins {
+    kotlin("multiplatform")
+    alias(spclibs.plugins.compose.compiler)
+    alias(spclibs.plugins.compose.jb)
+}
+
+val ktorVersion: String by rootProject.extra
+
+kotlin {
+    jvm()
+    jvmToolchain(11)
+    sourceSets {
+        val jvmMain by getting {
+            dependencies {
+                implementation(projects.mapsKtScheme)
+                implementation(compose.desktop.currentOs)
+                implementation("ch.qos.logback:logback-classic:1.2.11")
+            }
+        }
+        val jvmTest by getting
+    }
+}
+
+compose{
+    desktop {
+        application {
+            mainClass = "MainKt"
+            //mainClass = "Joker2023Kt"
+            nativeDistributions {
+                targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
+                packageName = "scheme-compose-demo"
+                packageVersion = "1.0.0"
+            }
+        }
+    }
+}

demo/scheme/src/jvmMain/kotlin/Main.kt

@@ -0,0 +1,110 @@
+// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+import androidx.compose.desktop.ui.tooling.preview.Preview
+import androidx.compose.foundation.ContextMenuArea
+import androidx.compose.foundation.ContextMenuItem
+import androidx.compose.material.MaterialTheme
+import androidx.compose.runtime.*
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.text.rememberTextMeasurer
+import androidx.compose.ui.window.Window
+import androidx.compose.ui.window.application
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
+import space.kscience.kmath.geometry.Angle
+import space.kscience.maps.features.*
+import space.kscience.maps.scheme.*
+import space.kscience.maps.svg.exportToPng
+import space.kscience.maps.svg.exportToSvg
+import java.awt.Desktop
+import java.nio.file.Files
+
+@Composable
+@Preview
+fun App() {
+    MaterialTheme {
+        val scope = rememberCoroutineScope()
+
+        val features = FeatureStore.remember(XYCoordinateSpace) {
+            background(1600f, 1200f) { painterResource("middle-earth.jpg") }
+            circle(410.52737 to 868.7676).color(Color.Blue)
+            text(410.52737 to 868.7676, "Shire").color(Color.Blue)
+            circle(1132.0881 to 394.99127).color(Color.Red)
+            text(1132.0881 to 394.99127, "Ordruin").color(Color.Red)
+            arc(center = 1132.0881 to 394.99127, radius = 20f, startAngle = Angle.zero, Angle.piTimes2)
+
+            //circle(410.52737 to 868.7676, id = "hobbit")
+
+            scope.launch {
+                var t = 0.0
+                while (isActive) {
+                    val x = 410.52737 + t * (1132.0881 - 410.52737)
+                    val y = 868.7676 + t * (394.99127 - 868.7676)
+                    circle(x to y, id = "hobbit").color(Color.Green)
+                    delay(100)
+                    t += 0.005
+                    if (t >= 1.0) t = 0.0
+                }
+            }
+        }
+
+        val initialViewPoint: ViewPoint<XY> = remember {
+            features.getBoundingBox(1f)?.computeViewPoint() ?: XYViewPoint(XY(0f, 0f))
+        }
+
+        var viewPoint: ViewPoint<XY> by remember { mutableStateOf(initialViewPoint) }
+
+        val painterCache = features.pointerCache()
+
+        val textMeasurer = rememberTextMeasurer()
+
+        ContextMenuArea(
+            items = {
+                listOf(
+                    ContextMenuItem("Export to SVG") {
+                        val path = Files.createTempFile("scheme-kt-", ".svg")
+                        features.exportToSvg(viewPoint, painterCache, Size(800f, 800f), path)
+                        println(path.toFile())
+                        Desktop.getDesktop().browse(path.toFile().toURI())
+                    },
+                    ContextMenuItem("Export to PNG") {
+                        val path = Files.createTempFile("scheme-kt-", ".png")
+                        features.exportToPng(
+                            viewPoint,
+                            painterCache,
+                            textMeasurer,
+                            Size(800f, 800f),
+                            path
+                        )
+                        println(path.toFile())
+                        Desktop.getDesktop().browse(path.toFile().toURI())
+                    }
+                )
+            }
+        ) {
+            val mapState: XYCanvasState = XYCanvasState.remember(
+                ViewConfig(
+                    onClick = { _, click ->
+                        println("${click.focus.x}, ${click.focus.y}")
+                    },
+                    onViewChange = { viewPoint = this }
+                ),
+                initialViewPoint = initialViewPoint,
+            )
+
+            SchemeView(
+                mapState,
+                features,
+            )
+        }
+
+    }
+}
+
+fun main() = application {
+    Window(title = "Scheme demo", onCloseRequest = ::exitApplication) {
+        App()
+    }
+}

demo/scheme/src/jvmMain/kotlin/joker2023.kt

@@ -0,0 +1,76 @@
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Face
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.window.Window
+import androidx.compose.ui.window.application
+import space.kscience.maps.features.*
+import space.kscience.maps.scheme.*
+import space.kscience.maps.scheme.XYCoordinateSpace.Rectangle
+
+
+fun main() = application {
+    Window(onCloseRequest = ::exitApplication, title = "Joker2023 demo", icon = painterResource("SPC-logo.png")) {
+        MaterialTheme {
+
+            SchemeView(
+                initialRectangle = Rectangle(XY(0f, 0f), XY(1734f, 724f)),
+                config = ViewConfig(
+                    onClick = { _, pointer ->
+                        println("(${pointer.focus.x}, ${pointer.focus.y})")
+                    }
+                )
+            ) {
+                background(1734f, 724f, id = "background") { painterResource("joker2023.png") }
+                group(id = "hall_1") {
+                    polygon(
+                        listOf(
+                            XY(1582.0042, 210.29636),
+                            XY(1433.7021, 127.79796),
+                            XY(1370.7639, 127.79796),
+                            XY(1315.293, 222.73865),
+                            XY(1314.2262, 476.625),
+                            XY(1364.3635, 570.4984),
+                            XY(1434.7689, 570.4984),
+                            XY(1579.8469, 493.69244),
+                        )
+                    ).modifyAttributes {
+                        ColorAttribute(Color.Blue)
+                        AlphaAttribute(0.4f)
+                    }.onClick {
+                        println("hall_1")
+                    }
+                }
+
+                group(id = "hall_2") {
+                    rectanglePolygon(
+                        left = 893, right = 1103,
+                        bottom = 223, top = 406,
+                    ).modifyAttributes {
+                        ColorAttribute(Color.Blue)
+                        AlphaAttribute(0.4f)
+                    }
+                }
+
+                group(id = "hall_3") {
+                    rectanglePolygon(
+                        Rectangle(XY(460f, 374f), width = 140f, height = 122f),
+                    ).modifyAttributes {
+                        ColorAttribute(Color.Blue)
+                        AlphaAttribute(0.4f)
+                    }
+                }
+
+                group(id = "people") {
+                    icon(XY(815.60535, 342.71313), Icons.Default.Face).color(Color.Red)
+                    icon(XY(743.751, 381.09064), Icons.Default.Face).color(Color.Red)
+                    icon(XY(1349.6648, 417.36014), Icons.Default.Face).color(Color.Red)
+                    icon(XY (1362.4658, 287.21667), Icons.Default.Face).color(Color.Red)
+                    icon(XY(208.24274, 317.08566), Icons.Default.Face).color(Color.Red)
+                    icon(XY (293.5827, 319.21915), Icons.Default.Face).color(Color.Red)
+                }
+            }
+        }
+    }
+}

demo/src/jvmMain/kotlin/Main.kt

@@ -1,96 +0,0 @@
-// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
-import androidx.compose.desktop.ui.tooling.preview.Preview
-import androidx.compose.foundation.layout.Column
-import androidx.compose.material.MaterialTheme
-import androidx.compose.material.Text
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.Home
-import androidx.compose.runtime.*
-import androidx.compose.ui.geometry.Size
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.window.Window
-import androidx.compose.ui.window.application
-import centre.sciprog.maps.GeodeticMapCoordinates
-import centre.sciprog.maps.MapViewPoint
-import centre.sciprog.maps.compose.*
-import io.ktor.client.*
-import io.ktor.client.engine.cio.*
-import kotlinx.coroutines.delay
-import kotlinx.coroutines.isActive
-import kotlinx.coroutines.launch
-import java.nio.file.Path
-import kotlin.random.Random
-
-@Composable
-@Preview
-fun App() {
-    MaterialTheme {
-        //create a view point
-        val viewPoint = remember {
-            MapViewPoint(
-                GeodeticMapCoordinates.ofDegrees(55.7558, 37.6173),
-                8.0
-            )
-        }
-
-        val scope = rememberCoroutineScope()
-        val mapTileProvider = remember {
-            OpenStreetMapTileProvider(
-                client = HttpClient(CIO),
-                cacheDirectory = Path.of("mapCache")
-            )
-        }
-
-        var coordinates by remember { mutableStateOf<GeodeticMapCoordinates?>(null) }
-
-        Column {
-            //display click coordinates
-            Text(coordinates?.toString() ?: "")
-            MapView(
-                mapTileProvider = mapTileProvider,
-                initialViewPoint = viewPoint,
-                onClick = { coordinates = focus },
-                config = MapViewConfig(inferViewBoxFromFeatures = true)
-            ) {
-                val pointOne = 55.568548 to 37.568604
-                val pointTwo = 55.929444 to 37.518434
-                val pointThree = 60.929444 to 37.518434
-
-                image(pointOne, Icons.Filled.Home)
-
-                //remember feature Id
-                val circleId: FeatureId = circle(
-                    centerCoordinates = pointTwo,
-                )
-
-                custom(position = pointThree) {
-                    drawRect(
-                        color = Color.Red,
-                        topLeft = it,
-                        size = Size(20f, 20f)
-                    )
-                }
-                line(pointOne, pointTwo)
-                text(pointOne, "Home")
-
-                scope.launch {
-                    while (isActive) {
-                        delay(200)
-                        //Overwrite a feature with new color
-                        circle(
-                            pointTwo,
-                            id = circleId,
-                            color = Color(Random.nextFloat(), Random.nextFloat(), Random.nextFloat())
-                        )
-                    }
-                }
-            }
-        }
-    }
-}
-
-fun main() = application {
-    Window(onCloseRequest = ::exitApplication) {
-        App()
-    }
-}

demo/trajectory-playground/README.md

@@ -0,0 +1,4 @@
+# Module trajectory-playground
+
+
+

demo/trajectory-playground/api/trajectory-playground.api

@@ -0,0 +1,25 @@
+public final class ComposableSingletons$MainKt {
+	public static final field INSTANCE LComposableSingletons$MainKt;
+	public static field lambda-1 Lkotlin/jvm/functions/Function2;
+	public static field lambda-2 Lkotlin/jvm/functions/Function3;
+	public static field lambda-3 Lkotlin/jvm/functions/Function3;
+	public fun <init> ()V
+	public final fun getLambda-1$trajectory_playground ()Lkotlin/jvm/functions/Function2;
+	public final fun getLambda-2$trajectory_playground ()Lkotlin/jvm/functions/Function3;
+	public final fun getLambda-3$trajectory_playground ()Lkotlin/jvm/functions/Function3;
+}
+
+public final class MainKt {
+	public static final fun closePoints (Landroidx/compose/runtime/Composer;I)V
+	public static final fun doubleObstacle (Landroidx/compose/runtime/Composer;I)V
+	public static final fun main ()V
+	public static synthetic fun main ([Ljava/lang/String;)V
+	public static final fun obstacle (Lcenter/sciprog/maps/features/FeatureGroup;Lspace/kscience/trajectory/Obstacle;Lkotlin/jvm/functions/Function1;)V
+	public static synthetic fun obstacle$default (Lcenter/sciprog/maps/features/FeatureGroup;Lspace/kscience/trajectory/Obstacle;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)V
+	public static final fun playground (Landroidx/compose/runtime/Composer;I)V
+	public static final fun pose (Lcenter/sciprog/maps/features/FeatureGroup;Lspace/kscience/trajectory/Pose2D;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun singleObstacle (Landroidx/compose/runtime/Composer;I)V
+	public static final fun trajectory (Lcenter/sciprog/maps/features/FeatureGroup;Lspace/kscience/trajectory/Trajectory2D;Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun trajectory$default (Lcenter/sciprog/maps/features/FeatureGroup;Lspace/kscience/trajectory/Trajectory2D;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+}
+

demo/trajectory-playground/build.gradle.kts

@@ -0,0 +1,31 @@
+plugins {
+    kotlin("multiplatform")
+    alias(spclibs.plugins.compose.compiler)
+    alias(spclibs.plugins.compose.jb)
+}
+
+val ktorVersion: String by rootProject.extra
+
+kotlin {
+    jvm()
+    jvmToolchain(11)
+    sourceSets {
+        val jvmMain by getting {
+            dependencies {
+                implementation(projects.mapsKtScheme)
+                implementation(projects.trajectoryKt)
+                implementation(compose.desktop.currentOs)
+                implementation(spclibs.logback.classic)
+            }
+        }
+        val jvmTest by getting
+    }
+}
+
+compose {
+    desktop {
+        application {
+            mainClass = "MainKt"
+        }
+    }
+}

demo/trajectory-playground/src/jvmMain/kotlin/Main.kt

@@ -0,0 +1,205 @@
+import androidx.compose.desktop.ui.tooling.preview.Preview
+import androidx.compose.foundation.layout.Column
+import androidx.compose.material.Button
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Scaffold
+import androidx.compose.material.Text
+import androidx.compose.runtime.*
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.window.Window
+import androidx.compose.ui.window.application
+import space.kscience.kmath.geometry.Angle
+import space.kscience.kmath.geometry.Vector2D
+import space.kscience.kmath.geometry.euclidean2d.Circle2D
+import space.kscience.kmath.geometry.euclidean2d.Float64Space2D
+import space.kscience.maps.features.*
+import space.kscience.maps.scheme.SchemeView
+import space.kscience.maps.scheme.XY
+import space.kscience.trajectory.*
+import kotlin.random.Random
+
+private fun Vector2D<out Number>.toXY() = XY(x.toFloat(), y.toFloat())
+
+private val random = Random(123)
+
+fun FeatureBuilder<XY>.trajectory(
+    trajectory: Trajectory2D,
+    colorPicker: (Trajectory2D) -> Color = { Color.Blue },
+): FeatureRef<XY, FeatureGroup<XY>> = group {
+    when (trajectory) {
+        is StraightTrajectory2D -> line(
+            aCoordinates = trajectory.begin.toXY(),
+            bCoordinates = trajectory.end.toXY(),
+        ).color(colorPicker(trajectory))
+
+        is CircleTrajectory2D -> with(Float64Space2D) {
+            val topLeft = trajectory.circle.center + vector(-trajectory.circle.radius, trajectory.circle.radius)
+            val bottomRight = trajectory.circle.center + vector(trajectory.circle.radius, -trajectory.circle.radius)
+
+            val rectangle = Rectangle(
+                topLeft.toXY(),
+                bottomRight.toXY()
+            )
+
+            arc(
+                oval = rectangle,
+                startAngle = trajectory.arcStart - Angle.piDiv2,
+                arcLength = trajectory.arcAngle,
+            ).color(colorPicker(trajectory))
+        }
+
+        is CompositeTrajectory2D -> trajectory.segments.forEach {
+            trajectory(it, colorPicker)
+        }
+    }
+}
+
+fun FeatureBuilder<XY>.obstacle(obstacle: Obstacle, colorPicker: (Trajectory2D) -> Color = { Color.Red }) {
+    trajectory(obstacle.circumvention, colorPicker)
+    polygon(obstacle.arcs.map { it.center.toXY() }).color(Color.Gray)
+}
+
+fun FeatureBuilder<XY>.pose(pose2D: Pose2D) = with(Float64Space2D) {
+    line(pose2D.toXY(), (pose2D + Pose2D.bearingToVector(pose2D.bearing)).toXY())
+}
+
+@Composable
+@Preview
+fun closePoints()  = with(Float64Space2D){
+    SchemeView {
+
+        val obstacle = Obstacle(
+            Circle2D(vector(0.0, 0.0), 1.0),
+            Circle2D(vector(0.0, 1.0), 1.0),
+            Circle2D(vector(1.0, 1.0), 1.0),
+            Circle2D(vector(1.0, 0.0), 1.0)
+        )
+        val enter = Pose2D(-0.8, -0.8, Angle.pi)
+        val exit = Pose2D(-0.8, -0.8, Angle.piDiv2)
+
+        pose(enter)
+        pose(exit)
+
+        val paths: List<Trajectory2D> = Obstacles.avoidObstacles(
+            enter,
+            exit,
+            1.0,
+            obstacle
+        )
+
+        obstacle(obstacle)
+
+        paths.forEach {
+            val color = Color(random.nextInt())
+            trajectory(it) { color }
+        }
+
+    }
+}
+
+@Composable
+@Preview
+fun singleObstacle() {
+    SchemeView {
+        val obstacle = Obstacle(Circle2D(Float64Space2D.vector(7.0, 1.0), 5.0))
+        val enter = Pose2D(-5, -1, Angle.pi / 4)
+        val exit = Pose2D(20, 4, Angle.pi * 3 / 4)
+
+        pose(enter)
+        pose(exit)
+        obstacle(obstacle)
+
+        Obstacles.avoidObstacles(
+            enter,
+            exit,
+            0.5,
+            obstacle
+        ).forEach {
+            val color = Color(random.nextInt())
+            trajectory(it) { color }
+        }
+    }
+}
+
+@Composable
+@Preview
+fun doubleObstacle() = with(Float64Space2D){
+    SchemeView {
+        val obstacles = arrayOf(
+            Obstacle(
+                Circle2D(vector(1.0, 6.5), 0.5),
+                Circle2D(vector(2.0, 1.0), 0.5),
+                Circle2D(vector(6.0, 0.0), 0.5),
+                Circle2D(vector(5.0, 5.0), 0.5)
+            ), Obstacle(
+                Circle2D(vector(10.0, 1.0), 0.5),
+                Circle2D(vector(16.0, 0.0), 0.5),
+                Circle2D(vector(14.0, 6.0), 0.5),
+                Circle2D(vector(9.0, 4.0), 0.5)
+            )
+        )
+
+        obstacles.forEach { obstacle(it) }
+        val enter = Pose2D(-5, -1, Angle.pi / 4)
+        val exit = Pose2D(20, 4, Angle.pi * 3 / 4)
+        pose(enter)
+        pose(exit)
+
+        Obstacles.avoidObstacles(
+            enter,
+            exit,
+            0.5,
+            *obstacles
+        ).forEach {
+            val color = Color(random.nextInt())
+            trajectory(it) { color }
+        }
+    }
+}
+
+@Composable
+@Preview
+fun singleElement() {
+    SchemeView {
+        points(listOf(XY(1f,1f)))
+    }
+}
+
+
+@Composable
+@Preview
+fun playground() {
+    val examples = listOf(
+        "Close starting points",
+        "Single obstacle",
+        "Two obstacles",
+        "Single element"
+    )
+
+    var currentExample by remember { mutableStateOf(examples.first()) }
+
+    Scaffold(floatingActionButton = {
+        Column {
+            examples.forEach {
+                Button(onClick = { currentExample = it }) {
+                    Text(it)
+                }
+            }
+        }
+    }) {
+        when (currentExample) {
+            examples[0] -> closePoints()
+            examples[1] -> singleObstacle()
+            examples[2] -> doubleObstacle()
+            examples[3] -> singleElement()
+        }
+    }
+}
+
+fun main() = application {
+    Window(title = "Trajectory-playground", onCloseRequest = ::exitApplication) {
+        MaterialTheme {
+            playground()
+        }
+    }
+}

docs/templates/ARTIFACT-TEMPLATE.md

@@ -0,0 +1,17 @@
+## Artifact:
+
+The Maven coordinates of this project are `${group}:${name}:${version}`.
+
+**Gradle Kotlin DSL:**
+```kotlin
+repositories {
+    maven("https://repo.kotlin.link")
+    mavenCentral()
+    // development and snapshot versions
+    maven("https://maven.pkg.jetbrains.space/spc/p/sci/dev")
+}
+
+dependencies {
+    implementation("${group}:${name}:${version}")
+}
+```

docs/templates/README-TEMPLATE.md

@@ -0,0 +1,9 @@
+# Maps-kt
+
+This repository is a work-in-progress implementation of Map-with-markers component for Compose-Multiplatform
+
+![](docs/images/Screenshot%202023-01-12%20110429.png)
+
+## Modules
+
+${modules}

gradle.properties

@@ -1,5 +1,5 @@
 kotlin.code.style=official
-kotlin.version=1.6.10
-compose.version=1.1.1
-agp.version=4.2.2
-android.useAndroidX=true
+
+org.gradle.jvmargs=-Xmx4096m
+
+toolsVersion=0.15.4-kotlin-2.0.0

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

maps-kt-compose/README.md

@@ -0,0 +1,22 @@
+# Module kmath-core
+
+The core interfaces of KMath.
+
+ - [osm](#) : OpenStreetMap tile provider.
+
+
+## Artifact:
+
+The Maven coordinates of this project are `space.kscience:maps-kt-compose:0.3.0`.
+
+**Gradle Kotlin DSL:**
+```kotlin
+repositories {
+    maven("https://repo.kotlin.link")
+    mavenCentral()
+}
+
+dependencies {
+    implementation("space.kscience:maps-kt-compose:0.3.0")
+}
+```

maps-kt-compose/build.gradle.kts

@@ -1,29 +1,45 @@
-import org.jetbrains.compose.compose
-import org.jetbrains.compose.desktop.application.dsl.TargetFormat
-
 plugins {
-    kotlin("multiplatform")
-    id("org.jetbrains.compose")
+    id("space.kscience.gradle.mpp")
+    alias(spclibs.plugins.compose.compiler)
+    alias(spclibs.plugins.compose.jb)
+//    id("com.android.library")
     `maven-publish`
 }
 
-val ktorVersion: String by rootProject.extra
+kscience {
+    jvm()
+    wasm()
 
-kotlin {
-    jvm {
-        compilations.all {
-            kotlinOptions.jvmTarget = "11"
-        }
+    useCoroutines()
+
+    commonMain{
+        api(projects.mapsKtCore)
+        api(projects.mapsKtFeatures)
+        api(compose.foundation)
+        api(project.dependencies.platform(spclibs.ktor.bom))
     }
-    sourceSets {
-        commonMain{
-            dependencies{
-                api(projects.mapsKtCore)
-                api(compose.foundation)
-                api("io.ktor:ktor-client-core:$ktorVersion")
-            }
-        }
-        val jvmMain by getting
-        val jvmTest by getting
+    jvmMain{
+        api("io.ktor:ktor-client-cio")
     }
-}
+    jvmTest{
+        implementation("io.ktor:ktor-client-cio")
+        implementation(compose.desktop.currentOs)
+        implementation(spclibs.kotlinx.coroutines.test)
+
+        implementation(spclibs.logback.classic)
+    }
+}
+
+readme {
+    description = "Compose-multiplaform implementation for web-mercator tiled maps"
+    maturity = space.kscience.gradle.Maturity.EXPERIMENTAL
+    propertyByTemplate("artifact", rootProject.file("docs/templates/ARTIFACT-TEMPLATE.md"))
+
+    feature(
+        id = "osm",
+    ) { "OpenStreetMap tile provider." }
+}
+
+//tasks.getByName<Copy>("downloadWix"){
+//    duplicatesStrategy = DuplicatesStrategy.WARN
+//}

maps-kt-compose/docs/README-TEMPLATE.md

@@ -0,0 +1,7 @@
+# Module kmath-core
+
+The core interfaces of KMath.
+
+${features}
+
+${artifact}

maps-kt-compose/src/commonMain/kotlin/centre/sciprog/maps/compose/FeatureBuilder.kt

@@ -1,85 +0,0 @@
-package centre.sciprog.maps.compose
-
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.mutableStateMapOf
-import androidx.compose.runtime.snapshots.SnapshotStateMap
-import androidx.compose.ui.geometry.Offset
-import androidx.compose.ui.geometry.Size
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.graphics.drawscope.DrawScope
-import androidx.compose.ui.graphics.vector.ImageVector
-import centre.sciprog.maps.GmcBox
-
-typealias FeatureId = String
-
-interface FeatureBuilder {
-    fun addFeature(id: FeatureId?, feature: MapFeature): FeatureId
-
-    fun build(): SnapshotStateMap<FeatureId, MapFeature>
-}
-
-internal class MapFeatureBuilder(initialFeatures: Map<FeatureId, MapFeature>) : FeatureBuilder {
-
-    private val content: SnapshotStateMap<FeatureId, MapFeature> = mutableStateMapOf<FeatureId, MapFeature>().apply {
-        putAll(initialFeatures)
-    }
-    private fun generateID(feature: MapFeature): FeatureId = "@feature[${feature.hashCode().toUInt()}]"
-
-    override fun addFeature(id: FeatureId?, feature: MapFeature): FeatureId {
-        val safeId = id ?: generateID(feature)
-        content[id ?: generateID(feature)] = feature
-        return safeId
-    }
-
-    override fun build(): SnapshotStateMap<FeatureId, MapFeature> = content
-}
-
-fun FeatureBuilder.circle(
-    centerCoordinates: Pair<Double, Double>,
-    zoomRange: IntRange = defaultZoomRange,
-    size: Float = 5f,
-    color: Color = Color.Red,
-    id: FeatureId? = null,
-) = addFeature(
-    id, MapCircleFeature(centerCoordinates.toCoordinates(), zoomRange, size, color)
-)
-
-fun FeatureBuilder.custom(
-    position: Pair<Double, Double>,
-    id: FeatureId? = null,
-    customFeatureBuilder: DrawScope.(Offset) -> Unit,
-) = addFeature(id, object : MapCustomFeature(position = position.toCoordinates()) {
-    override fun drawFeature(drawScope: DrawScope, offset: Offset) {
-        customFeatureBuilder(drawScope, offset)
-    }
-
-    override fun getBoundingBox(zoom: Int): GmcBox {
-        return GmcBox(position.toCoordinates(), position.toCoordinates())
-    }
-
-})
-
-fun FeatureBuilder.line(
-    aCoordinates: Pair<Double, Double>,
-    bCoordinates: Pair<Double, Double>,
-    zoomRange: IntRange = defaultZoomRange,
-    color: Color = Color.Red,
-    id: FeatureId? = null,
-) = addFeature(id, MapLineFeature(aCoordinates.toCoordinates(), bCoordinates.toCoordinates(), zoomRange, color))
-
-fun FeatureBuilder.text(
-    position: Pair<Double, Double>,
-    text: String,
-    zoomRange: IntRange = defaultZoomRange,
-    color: Color = Color.Red,
-    id: FeatureId? = null,
-) = addFeature(id, MapTextFeature(position.toCoordinates(), text, zoomRange, color))
-
-@Composable
-fun FeatureBuilder.image(
-    position: Pair<Double, Double>,
-    image: ImageVector,
-    size: Size = Size(20f, 20f),
-    zoomRange: IntRange = defaultZoomRange,
-    id: FeatureId? = null,
-) = addFeature(id, MapVectorImageFeature(position.toCoordinates(), image, size, zoomRange))

maps-kt-compose/src/commonMain/kotlin/centre/sciprog/maps/compose/MapFeature.kt

@@ -1,95 +0,0 @@
-package centre.sciprog.maps.compose
-
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.geometry.Offset
-import androidx.compose.ui.geometry.Size
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.graphics.ImageBitmap
-import androidx.compose.ui.graphics.drawscope.DrawScope
-import androidx.compose.ui.graphics.painter.Painter
-import androidx.compose.ui.graphics.vector.ImageVector
-import androidx.compose.ui.graphics.vector.rememberVectorPainter
-import androidx.compose.ui.unit.IntSize
-import centre.sciprog.maps.GeodeticMapCoordinates
-import centre.sciprog.maps.GmcBox
-import centre.sciprog.maps.wrapAll
-
-//TODO replace zoom range with zoom-based representation change
-sealed class MapFeature(val zoomRange: IntRange) {
-    abstract fun getBoundingBox(zoom: Int): GmcBox
-}
-
-fun Iterable<MapFeature>.computeBoundingBox(zoom: Int): GmcBox? = map { it.getBoundingBox(zoom) }.wrapAll()
-
-internal fun Pair<Double, Double>.toCoordinates() = GeodeticMapCoordinates.ofDegrees(first, second)
-
-internal val defaultZoomRange = 1..18
-
-/**
- * A feature that decides what to show depending on the zoom value (it could change size of shape)
- */
-class MapFeatureSelector(val selector: (zoom: Int) -> MapFeature) : MapFeature(defaultZoomRange) {
-    override fun getBoundingBox(zoom: Int): GmcBox = selector(zoom).getBoundingBox(zoom)
-
-}
-
-abstract class MapCustomFeature(
-    zoomRange: IntRange = defaultZoomRange,
-    val position: GeodeticMapCoordinates
-) : MapFeature(zoomRange) {
-    abstract fun drawFeature(drawScope: DrawScope, offset: Offset)
-}
-
-class MapCircleFeature(
-    val center: GeodeticMapCoordinates,
-    zoomRange: IntRange = defaultZoomRange,
-    val size: Float = 5f,
-    val color: Color = Color.Red,
-) : MapFeature(zoomRange) {
-    override fun getBoundingBox(zoom: Int): GmcBox = GmcBox(center, center)
-}
-
-class MapLineFeature(
-    val a: GeodeticMapCoordinates,
-    val b: GeodeticMapCoordinates,
-    zoomRange: IntRange = defaultZoomRange,
-    val color: Color = Color.Red,
-) : MapFeature(zoomRange) {
-    override fun getBoundingBox(zoom: Int): GmcBox = GmcBox(a, b)
-}
-
-class MapTextFeature(
-    val position: GeodeticMapCoordinates,
-    val text: String,
-    zoomRange: IntRange = defaultZoomRange,
-    val color: Color = Color.Red,
-) : MapFeature(zoomRange) {
-    override fun getBoundingBox(zoom: Int): GmcBox = GmcBox(position, position)
-}
-
-class MapBitmapImageFeature(
-    val position: GeodeticMapCoordinates,
-    val image: ImageBitmap,
-    val size: IntSize = IntSize(15, 15),
-    zoomRange: IntRange = defaultZoomRange,
-) : MapFeature(zoomRange) {
-    override fun getBoundingBox(zoom: Int): GmcBox = GmcBox(position, position)
-}
-
-
-class MapVectorImageFeature(
-    val position: GeodeticMapCoordinates,
-    val painter: Painter,
-    val size: Size,
-    zoomRange: IntRange = defaultZoomRange,
-) : MapFeature(zoomRange) {
-    override fun getBoundingBox(zoom: Int): GmcBox = GmcBox(position, position)
-}
-
-@Composable
-fun MapVectorImageFeature(
-    position: GeodeticMapCoordinates,
-    image: ImageVector,
-    size: Size = Size(20f, 20f),
-    zoomRange: IntRange = defaultZoomRange,
-): MapVectorImageFeature = MapVectorImageFeature(position, rememberVectorPainter(image), size, zoomRange)

maps-kt-compose/src/commonMain/kotlin/centre/sciprog/maps/compose/MapTileProvider.kt

@@ -1,31 +0,0 @@
-package centre.sciprog.maps.compose
-
-import androidx.compose.ui.graphics.ImageBitmap
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Deferred
-import kotlin.math.floor
-
-data class TileId(
-    val zoom: Int,
-    val i: Int,
-    val j: Int,
-)
-
-data class MapTile(
-    val id: TileId,
-    val image: ImageBitmap,
-)
-
-interface MapTileProvider {
-    fun CoroutineScope.loadTileAsync(tileId: TileId): Deferred<MapTile>
-
-    val tileSize: Int get() = DEFAULT_TILE_SIZE
-
-    fun toIndex(d: Double): Int = floor(d / tileSize).toInt()
-
-    fun toCoordinate(i: Int): Double = (i * tileSize).toDouble()
-
-    companion object {
-        const val DEFAULT_TILE_SIZE = 256
-    }
-}

maps-kt-compose/src/commonMain/kotlin/centre/sciprog/maps/compose/MapView.kt

@@ -1,66 +0,0 @@
-package centre.sciprog.maps.compose
-
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.unit.DpSize
-import centre.sciprog.maps.*
-import kotlin.math.PI
-import kotlin.math.log2
-import kotlin.math.min
-
-
-data class MapViewConfig(
-    val zoomSpeed: Double = 1.0 / 3.0,
-    val inferViewBoxFromFeatures: Boolean = false
-)
-
-@Composable
-expect fun MapView(
-    mapTileProvider: MapTileProvider,
-    computeViewPoint: (canvasSize: DpSize) -> MapViewPoint,
-    features: Map<FeatureId, MapFeature>,
-    onClick: MapViewPoint.() -> Unit = {},
-    //TODO consider replacing by modifier
-    config: MapViewConfig = MapViewConfig(),
-    modifier: Modifier = Modifier.fillMaxSize(),
-)
-
-@Composable
-fun MapView(
-    mapTileProvider: MapTileProvider,
-    initialViewPoint: MapViewPoint,
-    features: Map<FeatureId, MapFeature> = emptyMap(),
-    onClick: MapViewPoint.() -> Unit = {},
-    config: MapViewConfig = MapViewConfig(),
-    modifier: Modifier = Modifier.fillMaxSize(),
-    buildFeatures: @Composable (FeatureBuilder.() -> Unit) = {},
-) {
-    val featuresBuilder = MapFeatureBuilder(features)
-    featuresBuilder.buildFeatures()
-    MapView(mapTileProvider, { initialViewPoint }, featuresBuilder.build(), onClick, config, modifier)
-}
-
-@Composable
-fun MapView(
-    mapTileProvider: MapTileProvider,
-    box: GmcBox,
-    features: Map<FeatureId, MapFeature> = emptyMap(),
-    onClick: MapViewPoint.() -> Unit = {},
-    config: MapViewConfig = MapViewConfig(),
-    modifier: Modifier = Modifier.fillMaxSize(),
-    buildFeatures: @Composable (FeatureBuilder.() -> Unit) = {},
-) {
-    val featuresBuilder = MapFeatureBuilder(features)
-    featuresBuilder.buildFeatures()
-    val computeViewPoint: (canvasSize: DpSize) -> MapViewPoint = { canvasSize ->
-        val zoom = log2(
-            min(
-                canvasSize.width.value / box.width,
-                canvasSize.height.value / box.height
-            ) * PI / mapTileProvider.tileSize
-        )
-        MapViewPoint(box.center, zoom)
-    }
-    MapView(mapTileProvider, computeViewPoint, featuresBuilder.build(), onClick, config, modifier)
-}

maps-kt-compose/src/commonMain/kotlin/space/kscience/maps/compose/GmcRectangle.kt

@@ -0,0 +1,74 @@
+package space.kscience.maps.compose
+
+import space.kscience.kmath.geometry.Angle
+import space.kscience.kmath.geometry.abs
+import space.kscience.maps.coordinates.GeodeticMapCoordinates
+import space.kscience.maps.coordinates.Gmc
+import space.kscience.maps.features.Rectangle
+
+internal fun Angle.isBetween(a: Angle, b: Angle) = this in a..b || this in b..a
+
+/**
+ * A section of the map between two parallels and two meridians. The figure represents a square in a Mercator projection.
+ * Params are two opposing "corners" of  quasi-square.
+ *
+ * Note that this is a rectangle only on a Mercator projection.
+ */
+internal data class GmcRectangle(
+    override val a: GeodeticMapCoordinates,
+    override val b: GeodeticMapCoordinates,
+) : Rectangle<Gmc> {
+    override val center: GeodeticMapCoordinates
+        get() = GeodeticMapCoordinates.normalized(
+            (a.latitude + b.latitude) / 2,
+            (a.longitude + b.longitude) / 2
+        )
+
+
+    override fun contains(point: Gmc): Boolean =
+        point.latitude.isBetween(a.latitude, b.latitude) && point.longitude.isBetween(a.longitude, b.longitude)
+}
+
+/**
+ * Minimum longitude
+ */
+public val Rectangle<Gmc>.left: Angle get() = minOf(a.longitude, b.longitude)
+
+/**
+ * maximum longitude
+ */
+public val Rectangle<Gmc>.right: Angle get() = maxOf(a.longitude, b.longitude)
+
+/**
+ * Maximum latitude
+ */
+public val Rectangle<Gmc>.top: Angle get() = maxOf(a.latitude, b.latitude)
+
+/**
+ * Minimum latitude
+ */
+public val Rectangle<Gmc>.bottom: Angle get() = minOf(a.latitude, b.latitude)
+
+public val Rectangle<Gmc>.longitudeDelta: Angle get() = abs(a.longitude - b.longitude)
+public val Rectangle<Gmc>.latitudeDelta: Angle get() = abs(a.latitude - b.latitude)
+
+public val Rectangle<Gmc>.topLeft: Gmc get() = Gmc.normalized(top, left)
+public val Rectangle<Gmc>.bottomRight: Gmc get() = Gmc.normalized(bottom, right)
+
+//public fun GmcRectangle.enlarge(
+//    top: Distance,
+//    bottom: Distance = top,
+//    left: Distance = top,
+//    right: Distance = left,
+//): GmcRectangle {
+//
+//}
+//
+//public fun GmcRectangle.enlarge(
+//    top: Angle,
+//    bottom: Angle = top,
+//    left: Angle = top,
+//    right: Angle = left,
+//): GmcRectangle {
+//
+//}

maps-kt-compose/src/commonMain/kotlin/space/kscience/maps/compose/LruCache.kt

@@ -1,4 +1,6 @@
-package centre.sciprog.maps.compose
+@file:Suppress("DEPRECATION")
+
+package space.kscience.maps.compose
 
 import kotlin.jvm.Synchronized
 

maps-kt-compose/src/commonMain/kotlin/space/kscience/maps/compose/MapCanvasState.kt

@@ -0,0 +1,101 @@
+package space.kscience.maps.compose
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.DpOffset
+import androidx.compose.ui.unit.DpRect
+import androidx.compose.ui.unit.dp
+import space.kscience.kmath.geometry.radians
+import space.kscience.maps.coordinates.Gmc
+import space.kscience.maps.coordinates.MercatorProjection
+import space.kscience.maps.coordinates.WebMercatorCoordinates
+import space.kscience.maps.coordinates.WebMercatorProjection
+import space.kscience.maps.features.*
+import kotlin.math.*
+
+
+public class MapCanvasState internal constructor(
+    public val mapTileProvider: MapTileProvider,
+    config: ViewConfig<Gmc>,
+) : CanvasState<Gmc>(config) {
+    override val space: CoordinateSpace<Gmc> get() = WebMercatorSpace
+
+    private val scaleFactor: Float
+        get() = WebMercatorProjection.scaleFactor(zoom)
+
+    public val intZoom: Int get() = floor(zoom).toInt()
+
+    public val centerCoordinates: WebMercatorCoordinates
+        get() = WebMercatorProjection.toMercator(viewPoint.focus, intZoom) ?: WebMercatorCoordinates(intZoom, 0f, 0f)
+
+    public val tileScale: Float
+        get() = 2f.pow(zoom - floor(zoom))
+
+    /*
+     * Convert screen independent offset to GMC, adjusting for fractional zoom
+     */
+    override fun DpOffset.toCoordinates(): Gmc {
+        val mercator = WebMercatorCoordinates(
+            intZoom,
+            (x - canvasSize.width / 2).value / tileScale + centerCoordinates.x,
+            (y - canvasSize.height / 2).value / tileScale + centerCoordinates.y,
+        )
+        return WebMercatorProjection.toGeodetic(mercator)
+    }
+
+    override fun Gmc.toDpOffset(): DpOffset {
+        val mercator = WebMercatorProjection.toMercator(this, intZoom) ?: WebMercatorCoordinates(intZoom, 0f, 0f)
+        return DpOffset(
+            (canvasSize.width / 2 + (mercator.x.dp - centerCoordinates.x.dp) * tileScale),
+            (canvasSize.height / 2 + (mercator.y.dp - centerCoordinates.y.dp) * tileScale)
+        )
+    }
+
+    override fun Rectangle<Gmc>.toDpRect(): DpRect {
+        val topLeft = topLeft.toDpOffset()
+        val bottomRight = bottomRight.toDpOffset()
+        return DpRect(topLeft.x, topLeft.y, bottomRight.x, bottomRight.y)
+    }
+
+    override fun computeViewPoint(rectangle: Rectangle<Gmc>): ViewPoint<Gmc> {
+        val zoom = log2(
+            min(
+                canvasSize.width.value / rectangle.longitudeDelta.toRadians().value,
+                canvasSize.height.value / rectangle.latitudeDelta.toRadians().value
+            ) * 2 * PI / mapTileProvider.tileSize
+        ).coerceIn(0.0..22.0)
+        return space.ViewPoint(rectangle.center, zoom.toFloat())
+    }
+
+    override fun ViewPoint<Gmc>.moveBy(x: Dp, y: Dp): ViewPoint<Gmc> {
+        val deltaX = x.value / tileScale
+        val deltaY = y.value / tileScale
+        val newCoordinates = Gmc.normalized(
+            (focus.latitude + (deltaY / scaleFactor).radians).coerceIn(
+                -MercatorProjection.MAXIMUM_LATITUDE,
+                MercatorProjection.MAXIMUM_LATITUDE
+            ),
+            focus.longitude + (deltaX / scaleFactor).radians
+        )
+        return space.ViewPoint(newCoordinates, zoom)
+    }
+
+    public companion object {
+        @Composable
+        public fun remember(
+            mapTileProvider: MapTileProvider,
+            config: ViewConfig<Gmc> = ViewConfig(),
+            initialViewPoint: ViewPoint<Gmc>? = null,
+            initialRectangle: Rectangle<Gmc>? = null,
+        ): MapCanvasState = remember {
+            MapCanvasState(mapTileProvider, config).apply {
+                if (initialViewPoint != null) {
+                    viewPoint = initialViewPoint
+                } else if (initialRectangle != null) {
+                    viewPoint = computeViewPoint(initialRectangle)
+                }
+            }
+        }
+    }
+}

maps-kt-compose/src/commonMain/kotlin/space/kscience/maps/compose/MapTileProvider.kt

@@ -0,0 +1,31 @@
+package space.kscience.maps.compose
+
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Deferred
+import org.jetbrains.skia.Image
+import kotlin.math.floor
+
+public data class TileId(
+    val zoom: Int,
+    val i: Int,
+    val j: Int,
+)
+
+public data class MapTile(
+    val id: TileId,
+    val image: Image,
+)
+
+public interface MapTileProvider {
+    public fun CoroutineScope.loadTileAsync(tileId: TileId): Deferred<MapTile>
+
+    public val tileSize: Int get() = DEFAULT_TILE_SIZE
+
+    public fun toIndex(d: Float): Int = floor(d / tileSize).toInt()
+
+    public fun toCoordinate(i: Int): Float = (i * tileSize).toFloat()
+
+    public companion object {
+        public const val DEFAULT_TILE_SIZE: Int = 256
+    }
+}

maps-kt-compose/src/commonMain/kotlin/space/kscience/maps/compose/MapView.kt

@@ -0,0 +1,149 @@
+package space.kscience.maps.compose
+
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.mutableStateMapOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.drawscope.clipRect
+import androidx.compose.ui.graphics.toComposeImageBitmap
+import androidx.compose.ui.unit.IntOffset
+import androidx.compose.ui.unit.IntSize
+import androidx.compose.ui.unit.dp
+import io.github.oshai.kotlinlogging.KotlinLogging
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.supervisorScope
+import org.jetbrains.skia.Image
+import space.kscience.maps.coordinates.Gmc
+import space.kscience.maps.features.*
+import kotlin.math.ceil
+import kotlin.math.pow
+
+
+private fun IntRange.intersect(other: IntRange) = kotlin.math.max(first, other.first)..kotlin.math.min(last, other.last)
+
+private val logger = KotlinLogging.logger("MapView")
+
+/**
+ * A component that renders map and provides basic map manipulation capabilities
+ */
+@Composable
+public fun MapView(
+    mapState: MapCanvasState,
+    mapTileProvider: MapTileProvider,
+    featureStore: FeatureStore<Gmc>,
+    modifier: Modifier,
+) {
+    val mapTiles = remember(mapTileProvider) {
+        mutableStateMapOf<TileId, Image>()
+    }
+
+    with(mapState) {
+
+        // Load tiles asynchronously
+        LaunchedEffect(viewPoint, canvasSize) {
+            with(mapTileProvider) {
+                val indexRange = 0 until 2.0.pow(intZoom).toInt()
+
+                val left = centerCoordinates.x - canvasSize.width.value / 2 / tileScale
+                val right = centerCoordinates.x + canvasSize.width.value / 2 / tileScale
+                val horizontalIndices: IntRange = (toIndex(left)..toIndex(right)).intersect(indexRange)
+
+                val top = (centerCoordinates.y + canvasSize.height.value / 2 / tileScale)
+                val bottom = (centerCoordinates.y - canvasSize.height.value / 2 / tileScale)
+                val verticalIndices: IntRange = (toIndex(bottom)..toIndex(top)).intersect(indexRange)
+
+                for (j in verticalIndices) {
+                    for (i in horizontalIndices) {
+                        val id = TileId(intZoom, i, j)
+                        //ensure that failed tiles do not fail the application
+                        supervisorScope {
+                            //start all
+                            val deferred = loadTileAsync(id)
+                            //wait asynchronously for it to finish
+                            launch {
+                                try {
+                                    val tile = deferred.await()
+                                    mapTiles[tile.id] = tile.image
+                                } catch (ex: Exception) {
+                                    //displaying the error is maps responsibility
+                                    if (ex !is CancellationException) {
+                                        logger.error(ex) { "Failed to load tile with id=$id" }
+                                    }
+                                }
+                            }
+                        }
+                        mapTiles.keys.filter {
+                            it.zoom != intZoom || it.j !in verticalIndices || it.i !in horizontalIndices
+                        }.forEach {
+                            mapTiles.remove(it)
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+
+    FeatureCanvas(mapState, featureStore.featureFlow, modifier = modifier.canvasControls(mapState, featureStore)) {
+        val tileScale = mapState.tileScale
+
+        clipRect {
+            val tileSize = IntSize(
+                ceil((mapTileProvider.tileSize.dp * tileScale).toPx()).toInt(),
+                ceil((mapTileProvider.tileSize.dp * tileScale).toPx()).toInt()
+            )
+            mapTiles.forEach { (id, image) ->
+                //converting back from tile index to screen offset
+                val offset = IntOffset(
+                    (mapState.canvasSize.width / 2 + (mapTileProvider.toCoordinate(id.i).dp - mapState.centerCoordinates.x.dp) * tileScale).roundToPx(),
+                    (mapState.canvasSize.height / 2 + (mapTileProvider.toCoordinate(id.j).dp - mapState.centerCoordinates.y.dp) * tileScale).roundToPx()
+                )
+                drawImage(
+                    image = image.toComposeImageBitmap(),
+                    dstOffset = offset,
+                    dstSize = tileSize
+                )
+            }
+        }
+    }
+}
+
+/**
+ * Create a [MapView] with given [featureStore] group.
+ */
+@Composable
+public fun MapView(
+    mapTileProvider: MapTileProvider,
+    config: ViewConfig<Gmc>,
+    featureStore: FeatureStore<Gmc>,
+    initialViewPoint: ViewPoint<Gmc>? = null,
+    initialRectangle: Rectangle<Gmc>? = null,
+    modifier: Modifier = Modifier.fillMaxSize(),
+) {
+    val mapState = MapCanvasState.remember(mapTileProvider, config, initialViewPoint, initialRectangle)
+    MapView(mapState, mapTileProvider, featureStore, modifier)
+}
+
+/**
+ * Draw a map using convenient parameters. If neither [initialViewPoint], noe [initialRectangle] is defined,
+ * use map features to infer the view region.
+ * @param initialViewPoint The view point of the map using center and zoom. Is used if provided
+ * @param initialRectangle The rectangle to be used for view point computation. Used if [initialViewPoint] is not defined.
+ * @param buildFeatures - a builder for features
+ */
+@Composable
+public fun MapView(
+    mapTileProvider: MapTileProvider,
+    config: ViewConfig<Gmc> = ViewConfig(),
+    initialViewPoint: ViewPoint<Gmc>? = null,
+    initialRectangle: Rectangle<Gmc>? = null,
+    modifier: Modifier = Modifier.fillMaxSize(),
+    buildFeatures: FeatureStore<Gmc>.() -> Unit = {},
+) {
+    val featureState = FeatureStore.remember(WebMercatorSpace, buildFeatures)
+    val computedRectangle = initialRectangle ?: featureState.getBoundingBox()
+    MapView(mapTileProvider, config, featureState, initialViewPoint, computedRectangle, modifier)
+}

maps-kt-compose/src/commonMain/kotlin/space/kscience/maps/compose/MapViewPoint.kt

@@ -0,0 +1,20 @@
+package space.kscience.maps.compose
+
+import space.kscience.maps.coordinates.GeodeticMapCoordinates
+import space.kscience.maps.coordinates.Gmc
+import space.kscience.maps.coordinates.WebMercatorProjection
+import space.kscience.maps.features.ViewPoint
+
+/**
+ * Observable position on the map. Includes observation coordinate and [zoom] factor
+ */
+internal data class MapViewPoint(
+    override val focus: GeodeticMapCoordinates,
+    override val zoom: Float,
+) : ViewPoint<Gmc>{
+    val scaleFactor: Float by lazy { WebMercatorProjection.scaleFactor(zoom) }
+
+    public companion object{
+        public val globe: MapViewPoint = MapViewPoint(Gmc.ofRadians(0.0, 0.0), 1f)
+    }
+}

maps-kt-compose/src/commonMain/kotlin/space/kscience/maps/compose/WebMercatorSpace.kt

@@ -0,0 +1,143 @@
+package space.kscience.maps.compose
+
+import androidx.compose.ui.unit.DpOffset
+import androidx.compose.ui.unit.DpSize
+import androidx.compose.ui.unit.dp
+import space.kscience.kmath.geometry.Angle
+import space.kscience.kmath.geometry.radians
+import space.kscience.maps.coordinates.*
+import space.kscience.maps.features.CoordinateSpace
+import space.kscience.maps.features.Rectangle
+import space.kscience.maps.features.ViewPoint
+import kotlin.math.abs
+import kotlin.math.floor
+import kotlin.math.pow
+
+public object WebMercatorSpace : CoordinateSpace<Gmc> {
+
+    private fun intZoom(zoom: Float): Int = floor(zoom).toInt()
+    private fun tileScale(zoom: Float): Float = 2f.pow(zoom - floor(zoom))
+
+
+    override fun Rectangle(first: Gmc, second: Gmc): Rectangle<Gmc> =
+        space.kscience.maps.compose.GmcRectangle(first, second)
+
+    override fun Rectangle(center: Gmc, zoom: Float, size: DpSize): Rectangle<Gmc> {
+        val scale = WebMercatorProjection.scaleFactor(zoom)
+        return Rectangle(center, (size.width.value / scale).radians, (size.height.value / scale).radians)
+    }
+
+    override val defaultViewPoint: ViewPoint<Gmc> = MapViewPoint.globe
+
+    override fun ViewPoint(center: Gmc, zoom: Float): ViewPoint<Gmc> = MapViewPoint(center, zoom)
+
+    override fun ViewPoint<Gmc>.moveBy(delta: Gmc): ViewPoint<Gmc> {
+        val newCoordinates = Gmc.normalized(
+            (focus.latitude + delta.latitude).coerceIn(
+                -MercatorProjection.MAXIMUM_LATITUDE,
+                MercatorProjection.MAXIMUM_LATITUDE
+            ),
+            focus.longitude + delta.longitude
+        )
+        return MapViewPoint(newCoordinates, zoom)
+    }
+
+    override fun ViewPoint<Gmc>.zoomBy(zoomDelta: Float, invariant: Gmc): ViewPoint<Gmc> = if (invariant == focus) {
+        ViewPoint(focus, (zoom + zoomDelta).coerceIn(2f, 18f))
+    } else {
+        val difScale = (1 - 2f.pow(-zoomDelta))
+        val newCenter = Gmc.normalized(
+            focus.latitude + (invariant.latitude - focus.latitude) * difScale,
+            focus.longitude + (invariant.longitude - focus.longitude) * difScale
+        )
+        MapViewPoint(newCenter, (zoom + zoomDelta).coerceIn(2f, 18f))
+    }
+
+    override fun Rectangle<Gmc>.withCenter(center: Gmc): Rectangle<Gmc> =
+        Rectangle(center, height = latitudeDelta, width = longitudeDelta)
+
+    override fun Collection<Rectangle<Gmc>>.wrapRectangles(): Rectangle<Gmc>? {
+        if (isEmpty()) return null
+        //TODO optimize computation
+        val minLat = minOf { it.bottom }
+        val maxLat = maxOf { it.top }
+        val minLong = minOf { it.left }
+        val maxLong = maxOf { it.right }
+        return space.kscience.maps.compose.GmcRectangle(
+            Gmc.normalized(minLat, minLong),
+            Gmc.normalized(maxLat, maxLong)
+        )
+    }
+
+    override fun Collection<Gmc>.wrapPoints(): Rectangle<Gmc>? {
+        if (isEmpty()) return null
+        //TODO optimize computation
+        val minLat = minOf { it.latitude }
+        val maxLat = maxOf { it.latitude }
+        val minLong = minOf { it.longitude }
+        val maxLong = maxOf { it.longitude }
+        return space.kscience.maps.compose.GmcRectangle(
+            Gmc.normalized(minLat, minLong),
+            Gmc.normalized(maxLat, maxLong)
+        )
+    }
+
+    override fun Gmc.offsetTo(b: Gmc, zoom: Float): DpOffset {
+        val intZoom = intZoom(zoom)
+        val mercatorA = WebMercatorProjection.toMercator(this, intZoom) ?: WebMercatorCoordinates(intZoom, 0f, 0f)
+        val mercatorB = WebMercatorProjection.toMercator(b, intZoom) ?: WebMercatorCoordinates(intZoom, 0f, 0f)
+        val tileScale = tileScale(zoom)
+        return DpOffset(
+            (mercatorA.x - mercatorB.x).dp * tileScale,
+            (mercatorA.y - mercatorB.y).dp * tileScale
+        )
+    }
+
+    override fun Gmc.isInsidePolygon(points: List<Gmc>): Boolean = points.zipWithNext().count { (left, right) ->
+        //using raytracing algorithm with the ray pointing "up"
+        val longitudeRange = if (right.longitude >= left.longitude) {
+            left.longitude..right.longitude
+        } else {
+            right.longitude..left.longitude
+        }
+
+        if (longitude !in longitudeRange) return@count false
+
+        val longitudeDelta = right.longitude - left.longitude
+
+        left.latitude * abs((right.longitude - longitude) / longitudeDelta) +
+                right.latitude * abs((longitude - left.longitude) / longitudeDelta) >= latitude
+    } % 2 == 1
+}
+
+/**
+ * A quasi-square section. Note that latitudinal distance could be imprecise for large distances
+ */
+public fun CoordinateSpace<Gmc>.Rectangle(
+    center: Gmc,
+    height: Distance,
+    width: Distance,
+    ellipsoid: GeoEllipsoid = GeoEllipsoid.WGS84,
+): Rectangle<Gmc> {
+    val reducedRadius = ellipsoid.reducedRadius(center.latitude)
+    return Rectangle(center, (height / ellipsoid.polarRadius).radians, (width / reducedRadius).radians)
+}
+
+/**
+ * A quasi-square section.
+ */
+public fun CoordinateSpace<Gmc>.Rectangle(
+    center: GeodeticMapCoordinates,
+    height: Angle,
+    width: Angle,
+): Rectangle<Gmc> {
+    val a = Gmc.normalized(
+        center.latitude - (height / 2),
+        center.longitude - (width / 2)
+    )
+    val b = Gmc.normalized(
+        center.latitude + (height / 2),
+        center.longitude + (width / 2)
+    )
+    return space.kscience.maps.compose.GmcRectangle(a, b)
+}

maps-kt-compose/src/commonMain/kotlin/space/kscience/maps/compose/mapFeatures.kt

@@ -0,0 +1,173 @@
+package space.kscience.maps.compose
+
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.drawscope.DrawScope
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.DpSize
+import androidx.compose.ui.unit.dp
+import org.jetbrains.skia.Font
+import space.kscience.kmath.geometry.Angle
+import space.kscience.maps.coordinates.*
+import space.kscience.maps.features.*
+import kotlin.math.ceil
+
+
+internal fun FeatureBuilder<Gmc>.coordinatesOf(pair: Pair<Number, Number>) =
+    GeodeticMapCoordinates.ofDegrees(pair.first.toDouble(), pair.second.toDouble())
+
+public typealias MapFeature = Feature<Gmc>
+
+public fun FeatureBuilder<Gmc>.circle(
+    centerCoordinates: Pair<Number, Number>,
+    size: Dp = 5.dp,
+    id: String? = null,
+): FeatureRef<Gmc, CircleFeature<Gmc>> = feature(
+    id, CircleFeature(space, coordinatesOf(centerCoordinates), size)
+)
+
+public fun FeatureBuilder<Gmc>.rectangle(
+    centerCoordinates: Pair<Number, Number>,
+    size: DpSize = DpSize(5.dp, 5.dp),
+    id: String? = null,
+): FeatureRef<Gmc, RectangleFeature<Gmc>> = feature(
+    id, RectangleFeature(space, coordinatesOf(centerCoordinates), size)
+)
+
+
+public fun FeatureBuilder<Gmc>.draw(
+    position: Pair<Number, Number>,
+    id: String? = null,
+    draw: DrawScope.() -> Unit,
+): FeatureRef<Gmc, DrawFeature<Gmc>> = feature(
+    id,
+    DrawFeature(space, coordinatesOf(position), drawFeature = draw)
+)
+
+
+public fun FeatureBuilder<Gmc>.line(
+    curve: GmcCurve,
+    id: String? = null,
+): FeatureRef<Gmc, LineFeature<Gmc>> = feature(
+    id,
+    LineFeature(space, curve.forward.coordinates, curve.backward.coordinates)
+)
+
+/**
+ * A segmented geodetic curve
+ */
+public fun FeatureBuilder<Gmc>.geodeticLine(
+    curve: GmcCurve,
+    ellipsoid: GeoEllipsoid = GeoEllipsoid.WGS84,
+    maxLineDistance: Distance = 100.kilometers,
+    id: String? = null,
+): FeatureRef<Gmc, Feature<Gmc>> = if (curve.distance < maxLineDistance) {
+    feature(
+        id,
+        LineFeature(space, curve.forward.coordinates, curve.backward.coordinates)
+    )
+} else {
+    val segments = ceil(curve.distance / maxLineDistance).toInt()
+    val segmentSize = curve.distance / segments
+    val points = buildList<GmcPose> {
+        add(curve.forward)
+        repeat(segments) {
+            val segment = ellipsoid.curveInDirection(this.last(), segmentSize, 1e-2)
+            add(segment.backward)
+        }
+    }
+    multiLine(points.map { it.coordinates }, id = id)
+}
+
+public fun FeatureBuilder<Gmc>.geodeticLine(
+    from: Gmc,
+    to: Gmc,
+    ellipsoid: GeoEllipsoid = GeoEllipsoid.WGS84,
+    maxLineDistance: Distance = 100.kilometers,
+    id: String? = null,
+): FeatureRef<Gmc, Feature<Gmc>> = geodeticLine(ellipsoid.curveBetween(from, to), ellipsoid, maxLineDistance, id)
+
+public fun FeatureBuilder<Gmc>.line(
+    aCoordinates: Pair<Double, Double>,
+    bCoordinates: Pair<Double, Double>,
+    id: String? = null,
+): FeatureRef<Gmc, LineFeature<Gmc>> = feature(
+    id,
+    LineFeature(space, coordinatesOf(aCoordinates), coordinatesOf(bCoordinates))
+)
+
+public fun FeatureBuilder<Gmc>.arc(
+    center: Pair<Double, Double>,
+    radius: Distance,
+    startAngle: Angle,
+    arcLength: Angle,
+    id: String? = null,
+): FeatureRef<Gmc, ArcFeature<Gmc>> = feature(
+    id,
+    ArcFeature(
+        space,
+        oval = space.Rectangle(coordinatesOf(center), radius, radius),
+        startAngle = startAngle,
+        arcLength = arcLength,
+    )
+)
+
+public fun FeatureBuilder<Gmc>.points(
+    points: List<Pair<Double, Double>>,
+    id: String? = null,
+): FeatureRef<Gmc, PointsFeature<Gmc>> = feature(id, PointsFeature(space, points.map(::coordinatesOf)))
+
+public fun FeatureBuilder<Gmc>.multiLine(
+    points: List<Pair<Double, Double>>,
+    id: String? = null,
+): FeatureRef<Gmc, MultiLineFeature<Gmc>> = feature(id, MultiLineFeature(space, points.map(::coordinatesOf)))
+
+public fun FeatureBuilder<Gmc>.icon(
+    position: Pair<Double, Double>,
+    image: ImageVector,
+    size: DpSize = DpSize(20.dp, 20.dp),
+    id: String? = null,
+): FeatureRef<Gmc, VectorIconFeature<Gmc>> = feature(
+    id,
+    VectorIconFeature(
+        space,
+        coordinatesOf(position),
+        size,
+        image,
+    )
+)
+
+public fun FeatureBuilder<Gmc>.text(
+    position: Pair<Double, Double>,
+    text: String,
+    font: Font.() -> Unit = { size = 16f },
+    id: String? = null,
+): FeatureRef<Gmc, TextFeature<Gmc>> = feature(
+    id,
+    TextFeature(space, coordinatesOf(position), text, fontConfig = font)
+)
+
+public fun FeatureBuilder<Gmc>.pixelMap(
+    rectangle: Rectangle<Gmc>,
+    latitudeDelta: Angle,
+    longitudeDelta: Angle,
+    id: String? = null,
+    builder: (Gmc) -> Color?,
+): FeatureRef<Gmc, PixelMapFeature<Gmc>> = feature(
+    id,
+    PixelMapFeature(
+        space,
+        rectangle,
+        Structure2D(
+            ceil(rectangle.longitudeDelta / latitudeDelta).toInt(),
+            ceil(rectangle.latitudeDelta / longitudeDelta).toInt()
+
+        ) { (i, j) ->
+            val longitude = rectangle.left + longitudeDelta * i
+            val latitude = rectangle.bottom + latitudeDelta * j
+            builder(
+                Gmc(latitude, longitude)
+            )
+        }
+    )
+)

maps-kt-compose/src/jsMain/kotlin/compose/OpenStreetMapTileProvider.kt

@@ -0,0 +1,91 @@
+package center.sciprog.maps.compose
+
+import io.github.oshai.kotlinlogging.KotlinLogging
+import io.ktor.client.HttpClient
+import io.ktor.client.request.get
+import io.ktor.client.statement.readBytes
+import io.ktor.http.Url
+import io.ktor.util.decodeBase64Bytes
+import io.ktor.util.encodeBase64
+import kotlinx.browser.window
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Deferred
+import kotlinx.coroutines.async
+import kotlinx.coroutines.sync.Semaphore
+import kotlinx.coroutines.sync.withPermit
+import org.jetbrains.skia.Image
+import org.w3c.dom.Storage
+
+/**
+ * A [MapTileProvider] based on Open Street Map API. With in-memory and file cache
+ */
+public class OpenStreetMapTileProvider(
+    private val client: HttpClient,
+    private val storage: Storage = window.localStorage,
+    parallelism: Int = 4,
+    cacheCapacity: Int = 200,
+    private val osmBaseUrl: String = "https://tile.openstreetmap.org",
+) : MapTileProvider {
+    private val semaphore = Semaphore(parallelism)
+    private val cache = LruCache<TileId, Deferred<Image>>(cacheCapacity)
+
+    private fun TileId.osmUrl() = Url("$osmBaseUrl/${zoom}/${i}/${j}.png")
+
+    private fun TileId.imageName() = "${zoom}/${i}/${j}.png"
+
+    private fun TileId.readImage() = storage.getItem(imageName())
+
+    /**
+     * Download and cache the tile image
+     */
+    private fun CoroutineScope.downloadImageAsync(id: TileId): Deferred<Image> = async {
+
+        id.readImage()?.let { imageString ->
+            try {
+                return@async Image.makeFromEncoded(imageString.decodeBase64Bytes())
+            } catch (ex: Exception) {
+                logger.debug { "Failed to load image from $imageString" }
+                storage.removeItem(id.imageName())
+            }
+        }
+
+        //semaphore works only for actual download
+        semaphore.withPermit {
+            val url = id.osmUrl()
+            val byteArray = client.get(url).readBytes()
+            logger.debug { "Finished downloading map tile with id $id from $url" }
+            val imageName = id.imageName()
+            logger.debug { "Caching map tile $id to $imageName" }
+            storage.setItem(imageName, byteArray.encodeBase64())
+            Image.makeFromEncoded(byteArray)
+        }
+    }
+
+    override fun CoroutineScope.loadTileAsync(
+        tileId: TileId,
+    ): Deferred<MapTile> {
+
+        //start image download
+        val imageDeferred: Deferred<Image> = cache.getOrPut(tileId) {
+            downloadImageAsync(tileId)
+        }
+
+        //collect the result asynchronously
+        return async {
+            val image: Image = runCatching { imageDeferred.await() }.onFailure {
+                if (it !is CancellationException) {
+                    logger.error(it) { "Failed to load tile image with id=$tileId" }
+                }
+                cache.remove(tileId)
+            }.getOrThrow()
+
+            MapTile(tileId, image)
+        }
+    }
+
+
+    public companion object {
+        private val logger = KotlinLogging.logger("OpenStreetMapCache")
+    }
+}

maps-kt-compose/src/jvmMain/kotlin/centre/sciprog/maps/compose/MapViewJvm.kt

@@ -1,284 +0,0 @@
-package centre.sciprog.maps.compose
-
-import androidx.compose.foundation.Canvas
-import androidx.compose.foundation.gestures.drag
-import androidx.compose.foundation.gestures.forEachGesture
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.runtime.*
-import androidx.compose.ui.ExperimentalComposeUiApi
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.geometry.Offset
-import androidx.compose.ui.geometry.Rect
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.graphics.PathEffect
-import androidx.compose.ui.graphics.drawscope.*
-import androidx.compose.ui.graphics.nativeCanvas
-import androidx.compose.ui.graphics.toArgb
-import androidx.compose.ui.input.pointer.*
-import androidx.compose.ui.unit.*
-import centre.sciprog.maps.*
-import io.ktor.utils.io.CancellationException
-import kotlinx.coroutines.launch
-import mu.KotlinLogging
-import org.jetbrains.skia.Font
-import org.jetbrains.skia.Paint
-import kotlin.math.*
-
-
-private fun Color.toPaint(): Paint = Paint().apply {
-    isAntiAlias = true
-    color = toArgb()
-}
-
-private fun IntRange.intersect(other: IntRange) = max(first, other.first)..min(last, other.last)
-
-internal fun MapViewPoint.move(deltaX: Double, deltaY: Double): MapViewPoint {
-    val newCoordinates = GeodeticMapCoordinates.ofRadians(
-        (focus.latitude + deltaY / scaleFactor).coerceIn(
-            -MercatorProjection.MAXIMUM_LATITUDE,
-            MercatorProjection.MAXIMUM_LATITUDE
-        ),
-        focus.longitude + deltaX / scaleFactor
-    )
-    return MapViewPoint(newCoordinates, zoom)
-}
-
-private val logger = KotlinLogging.logger("MapView")
-
-/**
- * A component that renders map and provides basic map manipulation capabilities
- */
-@OptIn(ExperimentalComposeUiApi::class)
-@Composable
-actual fun MapView(
-    mapTileProvider: MapTileProvider,
-    computeViewPoint: (canvasSize: DpSize) -> MapViewPoint,
-    features: Map<FeatureId, MapFeature>,
-    onClick: MapViewPoint.() -> Unit,
-    config: MapViewConfig,
-    modifier: Modifier,
-) {
-    var canvasSize by remember { mutableStateOf(DpSize(512.dp, 512.dp)) }
-
-    var viewPointOverride: MapViewPoint? by remember {
-        mutableStateOf(
-            if (config.inferViewBoxFromFeatures) {
-                features.values.computeBoundingBox(1)?.let { box ->
-                    val zoom = log2(
-                        min(
-                            canvasSize.width.value / box.width,
-                            canvasSize.height.value / box.height
-                        ) * PI / mapTileProvider.tileSize
-                    )
-                    MapViewPoint(box.center, zoom)
-                }
-            } else {
-                null
-            }
-        )
-    }
-
-    val viewPoint by derivedStateOf { viewPointOverride ?: computeViewPoint(canvasSize) }
-
-    val zoom: Int by derivedStateOf { floor(viewPoint.zoom).toInt() }
-
-    val tileScale: Double by derivedStateOf { 2.0.pow(viewPoint.zoom - zoom) }
-
-    val mapTiles = remember { mutableStateListOf<MapTile>() }
-
-    val centerCoordinates by derivedStateOf { WebMercatorProjection.toMercator(viewPoint.focus, zoom) }
-
-    fun DpOffset.toMercator(): WebMercatorCoordinates = WebMercatorCoordinates(
-        zoom,
-        (x - canvasSize.width / 2).value / tileScale + centerCoordinates.x,
-        (y - canvasSize.height / 2).value / tileScale + centerCoordinates.y,
-    )
-
-    /*
-     * Convert screen independent offset to GMC, adjusting for fractional zoom
-     */
-    fun DpOffset.toGeodetic() = WebMercatorProjection.toGeodetic(toMercator())
-
-    // Selection rectangle. If null - no selection
-    var selectRect by remember { mutableStateOf<Rect?>(null) }
-
-    val canvasModifier = modifier.pointerInput(Unit) {
-        forEachGesture {
-            awaitPointerEventScope {
-                val event: PointerEvent = awaitPointerEvent()
-                event.changes.forEach { change ->
-                    if (event.buttons.isPrimaryPressed) {
-                        //Evaluating selection frame
-                        if (event.keyboardModifiers.isShiftPressed) {
-                            selectRect = Rect(change.position, change.position)
-                            drag(change.id) { dragChange ->
-                                selectRect?.let { rect ->
-                                    val offset = dragChange.position
-                                    selectRect = Rect(
-                                        min(offset.x, rect.left),
-                                        min(offset.y, rect.top),
-                                        max(offset.x, rect.right),
-                                        max(offset.y, rect.bottom)
-                                    )
-                                }
-                            }
-                            selectRect?.let { rect ->
-                                val (centerX, centerY) = rect.center
-                                val centerGmc = DpOffset(centerX.toDp(), centerY.toDp()).toGeodetic()
-
-                                val horizontalZoom: Float = log2(canvasSize.width.toPx() / rect.width)
-                                val verticalZoom: Float = log2(canvasSize.height.toPx() / rect.height)
-
-
-                                viewPointOverride = MapViewPoint(
-                                    centerGmc,
-                                    viewPoint.zoom + min(verticalZoom, horizontalZoom)
-                                )
-                                selectRect = null
-                            }
-                        } else {
-                            val dragStart = change.position
-                            val dpPos = DpOffset(dragStart.x.toDp(), dragStart.y.toDp())
-                            onClick(MapViewPoint(dpPos.toGeodetic(), viewPoint.zoom))
-                            drag(change.id) { dragChange ->
-                                val dragAmount = dragChange.position - dragChange.previousPosition
-                                viewPointOverride = viewPoint.move(
-                                    -dragAmount.x.toDp().value / tileScale,
-                                    +dragAmount.y.toDp().value / tileScale
-                                )
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }.onPointerEvent(PointerEventType.Scroll) {
-        val change = it.changes.first()
-        val (xPos, yPos) = change.position
-        //compute invariant point of translation
-        val invariant = DpOffset(xPos.toDp(), yPos.toDp()).toGeodetic()
-        viewPointOverride = viewPoint.zoom(-change.scrollDelta.y.toDouble() * config.zoomSpeed, invariant)
-    }.fillMaxSize()
-
-
-    // Load tiles asynchronously
-    LaunchedEffect(viewPoint, canvasSize) {
-        with(mapTileProvider) {
-            val indexRange = 0 until 2.0.pow(zoom).toInt()
-
-            val left = centerCoordinates.x - canvasSize.width.value / 2 / tileScale
-            val right = centerCoordinates.x + canvasSize.width.value / 2 / tileScale
-            val horizontalIndices: IntRange = (toIndex(left)..toIndex(right)).intersect(indexRange)
-
-            val top = (centerCoordinates.y + canvasSize.height.value / 2 / tileScale)
-            val bottom = (centerCoordinates.y - canvasSize.height.value / 2 / tileScale)
-            val verticalIndices: IntRange = (toIndex(bottom)..toIndex(top)).intersect(indexRange)
-
-            mapTiles.clear()
-
-            for (j in verticalIndices) {
-                for (i in horizontalIndices) {
-                    val id = TileId(zoom, i, j)
-                    //start all
-                    val deferred = loadTileAsync(id)
-                    //wait asynchronously for it to finish
-                    launch {
-                        try {
-                            mapTiles += deferred.await()
-                        } catch (ex: Exception) {
-                            if (ex !is CancellationException) {
-                                //displaying the error is maps responsibility
-                                logger.error(ex) { "Failed to load tile with id=$id" }
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-
-    Canvas(canvasModifier) {
-        fun WebMercatorCoordinates.toOffset(): Offset = Offset(
-            (canvasSize.width / 2 + (x.dp - centerCoordinates.x.dp) * tileScale.toFloat()).toPx(),
-            (canvasSize.height / 2 + (y.dp - centerCoordinates.y.dp) * tileScale.toFloat()).toPx()
-        )
-
-        //Convert GMC to offset in pixels (not DP), adjusting for zoom
-        fun GeodeticMapCoordinates.toOffset(): Offset = WebMercatorProjection.toMercator(this, zoom).toOffset()
-
-
-        fun DrawScope.drawFeature(zoom: Int, feature: MapFeature) {
-            when (feature) {
-                is MapFeatureSelector -> drawFeature(zoom, feature.selector(zoom))
-                is MapCircleFeature -> drawCircle(
-                    feature.color,
-                    feature.size,
-                    center = feature.center.toOffset()
-                )
-                is MapLineFeature -> drawLine(feature.color, feature.a.toOffset(), feature.b.toOffset())
-                is MapBitmapImageFeature -> drawImage(feature.image, feature.position.toOffset())
-                is MapVectorImageFeature -> {
-                    val offset = feature.position.toOffset()
-                    translate(offset.x - feature.size.width / 2, offset.y - feature.size.height / 2) {
-                        with(feature.painter) {
-                            draw(feature.size)
-                        }
-                    }
-                }
-                is MapTextFeature -> drawIntoCanvas { canvas ->
-                    val offset = feature.position.toOffset()
-                    canvas.nativeCanvas.drawString(
-                        feature.text,
-                        offset.x + 5,
-                        offset.y - 5,
-                        Font().apply { size = 16f },
-                        feature.color.toPaint()
-                    )
-                }
-                is MapCustomFeature -> drawIntoCanvas { canvas ->
-                    val offset = feature.position.toOffset()
-                    feature.drawFeature(this, offset)
-                }
-            }
-        }
-
-        if (canvasSize != size.toDpSize()) {
-            canvasSize = size.toDpSize()
-            logger.debug { "Recalculate canvas. Size: $size" }
-        }
-        clipRect {
-            val tileSize = IntSize(
-                ceil((mapTileProvider.tileSize.dp * tileScale.toFloat()).toPx()).toInt(),
-                ceil((mapTileProvider.tileSize.dp * tileScale.toFloat()).toPx()).toInt()
-            )
-            mapTiles.forEach { (id, image) ->
-                //converting back from tile index to screen offset
-                val offset = IntOffset(
-                    (canvasSize.width / 2 + (mapTileProvider.toCoordinate(id.i).dp - centerCoordinates.x.dp) * tileScale.toFloat()).roundToPx(),
-                    (canvasSize.height / 2 + (mapTileProvider.toCoordinate(id.j).dp - centerCoordinates.y.dp) * tileScale.toFloat()).roundToPx()
-                )
-                drawImage(
-                    image = image,
-                    dstOffset = offset,
-                    dstSize = tileSize
-                )
-            }
-            features.values.filter { zoom in it.zoomRange }.forEach { feature ->
-                drawFeature(zoom, feature)
-            }
-        }
-        selectRect?.let { rect ->
-            drawRect(
-                color = Color.Blue,
-                topLeft = rect.topLeft,
-                size = rect.size,
-                alpha = 0.5f,
-                style = Stroke(
-                    width = 2f,
-                    pathEffect = PathEffect.dashPathEffect(floatArrayOf(10f, 10f), 0f)
-                )
-            )
-        }
-    }
-}

maps-kt-compose/src/jvmMain/kotlin/space/kscience/maps/compose/OpenStreetMapTileProvider.kt

@@ -1,18 +1,12 @@
-package centre.sciprog.maps.compose
+package space.kscience.maps.compose
 
-import androidx.compose.ui.graphics.ImageBitmap
-import androidx.compose.ui.graphics.toComposeImageBitmap
+import io.github.oshai.kotlinlogging.KotlinLogging
 import io.ktor.client.HttpClient
 import io.ktor.client.request.get
 import io.ktor.client.statement.readBytes
-import io.ktor.utils.io.CancellationException
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Deferred
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.async
+import kotlinx.coroutines.*
 import kotlinx.coroutines.sync.Semaphore
 import kotlinx.coroutines.sync.withPermit
-import mu.KotlinLogging
 import org.jetbrains.skia.Image
 import java.net.URL
 import java.nio.file.Path
@@ -21,28 +15,29 @@ import kotlin.io.path.*
 /**
  * A [MapTileProvider] based on Open Street Map API. With in-memory and file cache
  */
-class OpenStreetMapTileProvider(
+public class OpenStreetMapTileProvider(
     private val client: HttpClient,
     private val cacheDirectory: Path,
-    parallelism: Int = 1,
+    parallelism: Int = 4,
     cacheCapacity: Int = 200,
+    private val osmBaseUrl: String = "https://tile.openstreetmap.org",
 ) : MapTileProvider {
     private val semaphore = Semaphore(parallelism)
-    private val cache = LruCache<TileId, Deferred<ImageBitmap>>(cacheCapacity)
+    private val cache = LruCache<TileId, Deferred<Image>>(cacheCapacity)
 
-    private fun TileId.osmUrl() = URL("https://tile.openstreetmap.org/${zoom}/${i}/${j}.png")
+    private fun TileId.osmUrl() = URL("$osmBaseUrl/${zoom}/${i}/${j}.png")
 
     private fun TileId.cacheFilePath() = cacheDirectory.resolve("${zoom}/${i}/${j}.png")
 
     /**
      * Download and cache the tile image
      */
-    private fun CoroutineScope.downloadImageAsync(id: TileId) = async(Dispatchers.IO) {
+    private fun CoroutineScope.downloadImageAsync(id: TileId): Deferred<Image> = async(Dispatchers.IO) {
 
         id.cacheFilePath()?.let { path ->
             if (path.exists()) {
                 try {
-                    return@async Image.makeFromEncoded(path.readBytes()).toComposeImageBitmap()
+                    return@async Image.makeFromEncoded(path.readBytes())
                 } catch (ex: Exception) {
                     logger.debug { "Failed to load image from $path" }
                     path.deleteIfExists()
@@ -54,9 +49,7 @@ class OpenStreetMapTileProvider(
         semaphore.withPermit {
             val url = id.osmUrl()
             val byteArray = client.get(url).readBytes()
-
             logger.debug { "Finished downloading map tile with id $id from $url" }
-
             id.cacheFilePath()?.let { path ->
                 logger.debug { "Caching map tile $id to $path" }
 
@@ -64,7 +57,7 @@ class OpenStreetMapTileProvider(
                 path.writeBytes(byteArray)
             }
 
-            Image.makeFromEncoded(byteArray).toComposeImageBitmap()
+            Image.makeFromEncoded(byteArray)
         }
     }
 
@@ -73,27 +66,25 @@ class OpenStreetMapTileProvider(
     ): Deferred<MapTile> {
 
         //start image download
-        val imageDeferred = cache.getOrPut(tileId) {
+        val imageDeferred: Deferred<Image> = cache.getOrPut(tileId) {
             downloadImageAsync(tileId)
         }
 
         //collect the result asynchronously
         return async {
-            val image = try {
-                imageDeferred.await()
-            } catch (ex: Exception) {
-                cache.remove(tileId)
-                if(ex !is CancellationException) {
-                    logger.error(ex) { "Failed to load tile image with id=$tileId" }
+            val image: Image = runCatching { imageDeferred.await() }.onFailure {
+                if(it !is CancellationException) {
+                    logger.error(it) { "Failed to load tile image with id=$tileId" }
                 }
-                throw ex
-            }
+                cache.remove(tileId)
+            }.getOrThrow()
+
             MapTile(tileId, image)
         }
     }
 
 
-    companion object {
+    public companion object {
         private val logger = KotlinLogging.logger("OpenStreetMapCache")
     }
-}
+}

maps-kt-compose/src/jvmMain/kotlin/space/kscience/maps/compose/mapExport.kt

@@ -0,0 +1,55 @@
+package space.kscience.maps.compose
+
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.graphics.asSkiaBitmap
+import androidx.compose.ui.graphics.painter.Painter
+import androidx.compose.ui.text.TextMeasurer
+import androidx.compose.ui.unit.DpSize
+import androidx.compose.ui.unit.dp
+import org.jetbrains.skia.Image
+import org.jfree.svg.SVGUtils
+import space.kscience.maps.coordinates.Gmc
+import space.kscience.maps.features.FeatureSet
+import space.kscience.maps.features.PainterFeature
+import space.kscience.maps.features.ViewConfig
+import space.kscience.maps.features.ViewPoint
+import space.kscience.maps.svg.generateBitmap
+import space.kscience.maps.svg.generateSvg
+import java.nio.file.Path
+import kotlin.io.path.writeBytes
+
+public fun FeatureSet<Gmc>.exportToSvg(
+    mapTileProvider: MapTileProvider,
+    viewPoint: ViewPoint<Gmc>,
+    painterCache: Map<PainterFeature<Gmc>, Painter>,
+    size: Size,
+    path: Path,
+) {
+    val mapCanvasState: MapCanvasState = MapCanvasState(mapTileProvider, ViewConfig()).apply {
+        this.viewPoint = viewPoint
+        this.canvasSize = DpSize(size.width.dp, size.height.dp)
+    }
+
+    val svgString: String = generateSvg(mapCanvasState, painterCache)
+    SVGUtils.writeToSVG(path.toFile(), svgString)
+}
+
+public fun FeatureSet<Gmc>.exportToPng(
+    mapTileProvider: MapTileProvider,
+    viewPoint: ViewPoint<Gmc>,
+    painterCache: Map<PainterFeature<Gmc>, Painter>,
+    textMeasurer: TextMeasurer,
+    size: Size,
+    path: Path,
+) {
+    val mapCanvasState: MapCanvasState = MapCanvasState(mapTileProvider, ViewConfig()).apply {
+        this.viewPoint = viewPoint
+        this.canvasSize = DpSize(size.width.dp, size.height.dp)
+    }
+
+    val bitmap = generateBitmap(mapCanvasState, painterCache, textMeasurer, size)
+
+    Image.makeFromBitmap(bitmap.asSkiaBitmap()).encodeToData()?.bytes?.let {
+        path.writeBytes(it)
+    }
+}

maps-kt-compose/src/jvmTest/kotlin/space/kscience/maps/compose/OsmTileProviderTest.kt

@@ -0,0 +1,43 @@
+package space.kscience.maps.compose
+
+import io.ktor.client.HttpClient
+import io.ktor.client.engine.cio.CIO
+import kotlinx.coroutines.supervisorScope
+import kotlinx.coroutines.test.runTest
+import org.junit.jupiter.api.Test
+import java.nio.file.Files
+import kotlin.test.assertFails
+
+class OsmTileProviderTest {
+//    @get:Rule
+//    val rule = createComposeRule()
+
+
+    @Test
+    fun testCorrectOsm() = runTest {
+        val provider = OpenStreetMapTileProvider(HttpClient(CIO), Files.createTempDirectory("mapCache"))
+        val tileId = TileId(3, 1, 1)
+        with(provider) {
+            loadTileAsync(tileId).await()
+        }
+    }
+
+    @Test
+    fun testFailedOsm() = runTest {
+        val provider = OpenStreetMapTileProvider(
+            HttpClient(CIO),
+            Files.createTempDirectory("mapCache"),
+            osmBaseUrl = "https://tile.openstreetmap1.org"
+        )
+        val tileId = TileId(3, 1, 1)
+        supervisorScope {
+            with(provider) {
+                val deferred = loadTileAsync(tileId)
+                assertFails {
+                    deferred.await()
+                }
+            }
+        }
+    }
+
+}

maps-kt-core/README.md

@@ -0,0 +1,24 @@
+# Module kmath-core
+
+The core interfaces of KMath.
+
+ - [angles and distances](#) : Type-safe angle and distance measurements.
+ - [ellipsoid](#) : Ellipsoid geometry and distances
+ - [mercator](#) : Mercator and web-mercator projections
+
+
+## Artifact:
+
+The Maven coordinates of this project are `space.kscience:maps-kt-core:0.3.0`.
+
+**Gradle Kotlin DSL:**
+```kotlin
+repositories {
+    maven("https://repo.kotlin.link")
+    mavenCentral()
+}
+
+dependencies {
+    implementation("space.kscience:maps-kt-core:0.3.0")
+}
+```

maps-kt-core/api/maps-kt-core.api

@@ -0,0 +1,250 @@
+public final class center/sciprog/maps/coordinates/Distance : java/lang/Comparable {
+	public static final field Companion Lcenter/sciprog/maps/coordinates/Distance$Companion;
+	public static final synthetic fun box-impl (D)Lcenter/sciprog/maps/coordinates/Distance;
+	public synthetic fun compareTo (Ljava/lang/Object;)I
+	public fun compareTo-LPoRJxU (D)I
+	public static fun compareTo-LPoRJxU (DD)I
+	public fun equals (Ljava/lang/Object;)Z
+	public static fun equals-impl (DLjava/lang/Object;)Z
+	public static final fun equals-impl0 (DD)Z
+	public final fun getKilometers ()D
+	public fun hashCode ()I
+	public static fun hashCode-impl (D)I
+	public fun toString ()Ljava/lang/String;
+	public static fun toString-impl (D)Ljava/lang/String;
+	public final synthetic fun unbox-impl ()D
+}
+
+public final class center/sciprog/maps/coordinates/Distance$$serializer : kotlinx/serialization/internal/GeneratedSerializer {
+	public static final field INSTANCE Lcenter/sciprog/maps/coordinates/Distance$$serializer;
+	public fun childSerializers ()[Lkotlinx/serialization/KSerializer;
+	public synthetic fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Ljava/lang/Object;
+	public fun deserialize-h1Ihu8M (Lkotlinx/serialization/encoding/Decoder;)D
+	public fun getDescriptor ()Lkotlinx/serialization/descriptors/SerialDescriptor;
+	public synthetic fun serialize (Lkotlinx/serialization/encoding/Encoder;Ljava/lang/Object;)V
+	public fun serialize-xeUJnDc (Lkotlinx/serialization/encoding/Encoder;D)V
+	public fun typeParametersSerializers ()[Lkotlinx/serialization/KSerializer;
+}
+
+public final class center/sciprog/maps/coordinates/Distance$Companion {
+	public final fun serializer ()Lkotlinx/serialization/KSerializer;
+}
+
+public final class center/sciprog/maps/coordinates/DistanceKt {
+	public static final fun div-XO6jDg8 (DLjava/lang/Number;)D
+	public static final fun div-yHr8yDM (DD)D
+	public static final fun getKilometers (Ljava/lang/Number;)D
+	public static final fun getMeters (Ljava/lang/Number;)D
+	public static final fun getMeters-LPoRJxU (D)D
+	public static final fun minus-yHr8yDM (DD)D
+	public static final fun plus-yHr8yDM (DD)D
+	public static final fun times-XO6jDg8 (DLjava/lang/Number;)D
+}
+
+public final class center/sciprog/maps/coordinates/GeoEllipsoid {
+	public static final field Companion Lcenter/sciprog/maps/coordinates/GeoEllipsoid$Companion;
+	public synthetic fun <init> (DDLkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (ILcenter/sciprog/maps/coordinates/Distance;Lcenter/sciprog/maps/coordinates/Distance;DDDDLkotlinx/serialization/internal/SerializationConstructorMarker;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun getESquared ()D
+	public final fun getEccentricity ()D
+	public final fun getEquatorRadius-zipobaw ()D
+	public final fun getF ()D
+	public final fun getInverseF ()D
+	public final fun getPolarRadius-zipobaw ()D
+	public static final synthetic fun write$Self (Lcenter/sciprog/maps/coordinates/GeoEllipsoid;Lkotlinx/serialization/encoding/CompositeEncoder;Lkotlinx/serialization/descriptors/SerialDescriptor;)V
+}
+
+public final class center/sciprog/maps/coordinates/GeoEllipsoid$$serializer : kotlinx/serialization/internal/GeneratedSerializer {
+	public static final field INSTANCE Lcenter/sciprog/maps/coordinates/GeoEllipsoid$$serializer;
+	public fun childSerializers ()[Lkotlinx/serialization/KSerializer;
+	public fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Lcenter/sciprog/maps/coordinates/GeoEllipsoid;
+	public synthetic fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Ljava/lang/Object;
+	public fun getDescriptor ()Lkotlinx/serialization/descriptors/SerialDescriptor;
+	public fun serialize (Lkotlinx/serialization/encoding/Encoder;Lcenter/sciprog/maps/coordinates/GeoEllipsoid;)V
+	public synthetic fun serialize (Lkotlinx/serialization/encoding/Encoder;Ljava/lang/Object;)V
+	public fun typeParametersSerializers ()[Lkotlinx/serialization/KSerializer;
+}
+
+public final class center/sciprog/maps/coordinates/GeoEllipsoid$Companion {
+	public final fun getGRS80 ()Lcenter/sciprog/maps/coordinates/GeoEllipsoid;
+	public final fun getSphere ()Lcenter/sciprog/maps/coordinates/GeoEllipsoid;
+	public final fun getWGS84 ()Lcenter/sciprog/maps/coordinates/GeoEllipsoid;
+	public final fun serializer ()Lkotlinx/serialization/KSerializer;
+}
+
+public final class center/sciprog/maps/coordinates/GeoEllipsoidKt {
+	public static final fun reducedRadius (Lcenter/sciprog/maps/coordinates/GeoEllipsoid;Lspace/kscience/kmath/geometry/Angle;)D
+}
+
+public final class center/sciprog/maps/coordinates/GeodeticMapCoordinates : space/kscience/kmath/geometry/Vector2D {
+	public static final field Companion Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates$Companion;
+	public synthetic fun <init> (ILspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Lcenter/sciprog/maps/coordinates/Distance;Lkotlinx/serialization/internal/SerializationConstructorMarker;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Lcenter/sciprog/maps/coordinates/Distance;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Lcenter/sciprog/maps/coordinates/Distance;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public fun equals (Ljava/lang/Object;)Z
+	public final fun getElevation-irfbOC8 ()Lcenter/sciprog/maps/coordinates/Distance;
+	public final fun getLatitude ()Lspace/kscience/kmath/geometry/Angle;
+	public final fun getLongitude ()Lspace/kscience/kmath/geometry/Angle;
+	public synthetic fun getX ()Ljava/lang/Object;
+	public fun getX ()Lspace/kscience/kmath/geometry/Angle;
+	public synthetic fun getY ()Ljava/lang/Object;
+	public fun getY ()Lspace/kscience/kmath/geometry/Angle;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public static final synthetic fun write$Self (Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;Lkotlinx/serialization/encoding/CompositeEncoder;Lkotlinx/serialization/descriptors/SerialDescriptor;)V
+}
+
+public final class center/sciprog/maps/coordinates/GeodeticMapCoordinates$$serializer : kotlinx/serialization/internal/GeneratedSerializer {
+	public static final field INSTANCE Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates$$serializer;
+	public fun childSerializers ()[Lkotlinx/serialization/KSerializer;
+	public fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;
+	public synthetic fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Ljava/lang/Object;
+	public fun getDescriptor ()Lkotlinx/serialization/descriptors/SerialDescriptor;
+	public fun serialize (Lkotlinx/serialization/encoding/Encoder;Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;)V
+	public synthetic fun serialize (Lkotlinx/serialization/encoding/Encoder;Ljava/lang/Object;)V
+	public fun typeParametersSerializers ()[Lkotlinx/serialization/KSerializer;
+}
+
+public final class center/sciprog/maps/coordinates/GeodeticMapCoordinates$Companion {
+	public final fun normalized-8x94Bck (Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Lcenter/sciprog/maps/coordinates/Distance;)Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;
+	public static synthetic fun normalized-8x94Bck$default (Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates$Companion;Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Lcenter/sciprog/maps/coordinates/Distance;ILjava/lang/Object;)Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;
+	public final fun ofDegrees-8x94Bck (DDLcenter/sciprog/maps/coordinates/Distance;)Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;
+	public static synthetic fun ofDegrees-8x94Bck$default (Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates$Companion;DDLcenter/sciprog/maps/coordinates/Distance;ILjava/lang/Object;)Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;
+	public final fun ofRadians-8x94Bck (DDLcenter/sciprog/maps/coordinates/Distance;)Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;
+	public static synthetic fun ofRadians-8x94Bck$default (Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates$Companion;DDLcenter/sciprog/maps/coordinates/Distance;ILjava/lang/Object;)Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;
+	public final fun serializer ()Lkotlinx/serialization/KSerializer;
+}
+
+public final class center/sciprog/maps/coordinates/GmcCurve {
+	public synthetic fun <init> (Lcenter/sciprog/maps/coordinates/GmcPose;Lcenter/sciprog/maps/coordinates/GmcPose;DLkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun getBackward ()Lcenter/sciprog/maps/coordinates/GmcPose;
+	public final fun getDistance-zipobaw ()D
+	public final fun getForward ()Lcenter/sciprog/maps/coordinates/GmcPose;
+	public fun toString ()Ljava/lang/String;
+}
+
+public final class center/sciprog/maps/coordinates/GmcCurveKt {
+	public static final fun contains (Lkotlin/ranges/ClosedRange;Lspace/kscience/kmath/geometry/Angle;)Z
+	public static final fun curveBetween (Lcenter/sciprog/maps/coordinates/GeoEllipsoid;Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;D)Lcenter/sciprog/maps/coordinates/GmcCurve;
+	public static synthetic fun curveBetween$default (Lcenter/sciprog/maps/coordinates/GeoEllipsoid;Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;DILjava/lang/Object;)Lcenter/sciprog/maps/coordinates/GmcCurve;
+	public static final fun curveInDirection-EeP4nfk (Lcenter/sciprog/maps/coordinates/GeoEllipsoid;Lcenter/sciprog/maps/coordinates/GmcPose;DD)Lcenter/sciprog/maps/coordinates/GmcCurve;
+	public static synthetic fun curveInDirection-EeP4nfk$default (Lcenter/sciprog/maps/coordinates/GeoEllipsoid;Lcenter/sciprog/maps/coordinates/GmcPose;DDILjava/lang/Object;)Lcenter/sciprog/maps/coordinates/GmcCurve;
+	public static final fun meridianCurve-L4GImx8 (Lcenter/sciprog/maps/coordinates/GeoEllipsoid;Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;D)Lcenter/sciprog/maps/coordinates/GmcCurve;
+	public static synthetic fun meridianCurve-L4GImx8$default (Lcenter/sciprog/maps/coordinates/GeoEllipsoid;Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;DILjava/lang/Object;)Lcenter/sciprog/maps/coordinates/GmcCurve;
+	public static final fun parallelCurve (Lcenter/sciprog/maps/coordinates/GeoEllipsoid;Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;)Lcenter/sciprog/maps/coordinates/GmcCurve;
+	public static final fun reversed (Lcenter/sciprog/maps/coordinates/GmcCurve;)Lcenter/sciprog/maps/coordinates/GmcCurve;
+}
+
+public final class center/sciprog/maps/coordinates/GmcPose {
+	public static final field Companion Lcenter/sciprog/maps/coordinates/GmcPose$Companion;
+	public synthetic fun <init> (ILcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;Lspace/kscience/kmath/geometry/Angle;Lkotlinx/serialization/internal/SerializationConstructorMarker;)V
+	public fun <init> (Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;Lspace/kscience/kmath/geometry/Angle;)V
+	public final fun component1 ()Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;
+	public final fun component2 ()Lspace/kscience/kmath/geometry/Angle;
+	public final fun copy (Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;Lspace/kscience/kmath/geometry/Angle;)Lcenter/sciprog/maps/coordinates/GmcPose;
+	public static synthetic fun copy$default (Lcenter/sciprog/maps/coordinates/GmcPose;Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;Lspace/kscience/kmath/geometry/Angle;ILjava/lang/Object;)Lcenter/sciprog/maps/coordinates/GmcPose;
+	public fun equals (Ljava/lang/Object;)Z
+	public final fun getBearing ()Lspace/kscience/kmath/geometry/Angle;
+	public final fun getCoordinates ()Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;
+	public final fun getLatitude ()Lspace/kscience/kmath/geometry/Angle;
+	public final fun getLongitude ()Lspace/kscience/kmath/geometry/Angle;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public static final synthetic fun write$Self (Lcenter/sciprog/maps/coordinates/GmcPose;Lkotlinx/serialization/encoding/CompositeEncoder;Lkotlinx/serialization/descriptors/SerialDescriptor;)V
+}
+
+public final class center/sciprog/maps/coordinates/GmcPose$$serializer : kotlinx/serialization/internal/GeneratedSerializer {
+	public static final field INSTANCE Lcenter/sciprog/maps/coordinates/GmcPose$$serializer;
+	public fun childSerializers ()[Lkotlinx/serialization/KSerializer;
+	public fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Lcenter/sciprog/maps/coordinates/GmcPose;
+	public synthetic fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Ljava/lang/Object;
+	public fun getDescriptor ()Lkotlinx/serialization/descriptors/SerialDescriptor;
+	public fun serialize (Lkotlinx/serialization/encoding/Encoder;Lcenter/sciprog/maps/coordinates/GmcPose;)V
+	public synthetic fun serialize (Lkotlinx/serialization/encoding/Encoder;Ljava/lang/Object;)V
+	public fun typeParametersSerializers ()[Lkotlinx/serialization/KSerializer;
+}
+
+public final class center/sciprog/maps/coordinates/GmcPose$Companion {
+	public final fun serializer ()Lkotlinx/serialization/KSerializer;
+}
+
+public final class center/sciprog/maps/coordinates/GmcPoseKt {
+	public static final fun reversed (Lcenter/sciprog/maps/coordinates/GmcPose;)Lcenter/sciprog/maps/coordinates/GmcPose;
+}
+
+public abstract interface class center/sciprog/maps/coordinates/MapProjection {
+	public static final field Companion Lcenter/sciprog/maps/coordinates/MapProjection$Companion;
+	public abstract fun toGeodetic (Ljava/lang/Object;)Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;
+	public abstract fun toProjection (Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;)Ljava/lang/Object;
+}
+
+public final class center/sciprog/maps/coordinates/MapProjection$Companion {
+	public final fun getEpsg3857 ()Lcenter/sciprog/maps/coordinates/MercatorProjection;
+}
+
+public class center/sciprog/maps/coordinates/MercatorProjection : center/sciprog/maps/coordinates/MapProjection {
+	public static final field Companion Lcenter/sciprog/maps/coordinates/MercatorProjection$Companion;
+	public fun <init> ()V
+	public synthetic fun <init> (ILspace/kscience/kmath/geometry/Angle;Lcenter/sciprog/maps/coordinates/GeoEllipsoid;Lkotlinx/serialization/internal/SerializationConstructorMarker;)V
+	public fun <init> (Lspace/kscience/kmath/geometry/Angle;Lcenter/sciprog/maps/coordinates/GeoEllipsoid;)V
+	public synthetic fun <init> (Lspace/kscience/kmath/geometry/Angle;Lcenter/sciprog/maps/coordinates/GeoEllipsoid;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun getBaseLongitude ()Lspace/kscience/kmath/geometry/Angle;
+	public final fun getEllipsoid ()Lcenter/sciprog/maps/coordinates/GeoEllipsoid;
+	public fun toGeodetic (Lcenter/sciprog/maps/coordinates/ProjectionCoordinates;)Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;
+	public synthetic fun toGeodetic (Ljava/lang/Object;)Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;
+	public fun toProjection (Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;)Lcenter/sciprog/maps/coordinates/ProjectionCoordinates;
+	public synthetic fun toProjection (Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;)Ljava/lang/Object;
+	public static final synthetic fun write$Self (Lcenter/sciprog/maps/coordinates/MercatorProjection;Lkotlinx/serialization/encoding/CompositeEncoder;Lkotlinx/serialization/descriptors/SerialDescriptor;)V
+}
+
+public final class center/sciprog/maps/coordinates/MercatorProjection$$serializer : kotlinx/serialization/internal/GeneratedSerializer {
+	public static final field INSTANCE Lcenter/sciprog/maps/coordinates/MercatorProjection$$serializer;
+	public fun childSerializers ()[Lkotlinx/serialization/KSerializer;
+	public fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Lcenter/sciprog/maps/coordinates/MercatorProjection;
+	public synthetic fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Ljava/lang/Object;
+	public fun getDescriptor ()Lkotlinx/serialization/descriptors/SerialDescriptor;
+	public fun serialize (Lkotlinx/serialization/encoding/Encoder;Lcenter/sciprog/maps/coordinates/MercatorProjection;)V
+	public synthetic fun serialize (Lkotlinx/serialization/encoding/Encoder;Ljava/lang/Object;)V
+	public fun typeParametersSerializers ()[Lkotlinx/serialization/KSerializer;
+}
+
+public final class center/sciprog/maps/coordinates/MercatorProjection$Companion {
+	public final fun getMAXIMUM_LATITUDE ()Lspace/kscience/kmath/geometry/Angle;
+	public final fun serializer ()Lkotlinx/serialization/KSerializer;
+}
+
+public final class center/sciprog/maps/coordinates/ProjectionCoordinates {
+	public synthetic fun <init> (DDLkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1-zipobaw ()D
+	public final fun component2-zipobaw ()D
+	public final fun copy-yHr8yDM (DD)Lcenter/sciprog/maps/coordinates/ProjectionCoordinates;
+	public static synthetic fun copy-yHr8yDM$default (Lcenter/sciprog/maps/coordinates/ProjectionCoordinates;DDILjava/lang/Object;)Lcenter/sciprog/maps/coordinates/ProjectionCoordinates;
+	public fun equals (Ljava/lang/Object;)Z
+	public final fun getX-zipobaw ()D
+	public final fun getY-zipobaw ()D
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+}
+
+public final class center/sciprog/maps/coordinates/WebMercatorCoordinates {
+	public fun <init> (IFF)V
+	public final fun component1 ()I
+	public final fun component2 ()F
+	public final fun component3 ()F
+	public final fun copy (IFF)Lcenter/sciprog/maps/coordinates/WebMercatorCoordinates;
+	public static synthetic fun copy$default (Lcenter/sciprog/maps/coordinates/WebMercatorCoordinates;IFFILjava/lang/Object;)Lcenter/sciprog/maps/coordinates/WebMercatorCoordinates;
+	public fun equals (Ljava/lang/Object;)Z
+	public final fun getX ()F
+	public final fun getY ()F
+	public final fun getZoom ()I
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+}
+
+public final class center/sciprog/maps/coordinates/WebMercatorProjection {
+	public static final field INSTANCE Lcenter/sciprog/maps/coordinates/WebMercatorProjection;
+	public final fun scaleFactor (F)F
+	public final fun toGeodetic (Lcenter/sciprog/maps/coordinates/WebMercatorCoordinates;)Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;
+	public final fun toMercator (Lcenter/sciprog/maps/coordinates/GeodeticMapCoordinates;I)Lcenter/sciprog/maps/coordinates/WebMercatorCoordinates;
+}
+

maps-kt-core/build.gradle.kts

@@ -1,26 +1,37 @@
 plugins {
-    kotlin("multiplatform")
+    id("space.kscience.gradle.mpp")
     `maven-publish`
 }
 
-val ktorVersion: String by rootProject.extra
+val kmathVersion: String by rootProject.extra
 
-kotlin {
-    jvm {
-        compilations.all {
-            kotlinOptions.jvmTarget = "11"
-        }
-    }
-    js(IR){
-        browser()
-    }
-    sourceSets {
-        commonMain{
-            dependencies{
-                api("io.github.microutils:kotlin-logging:2.1.23")
-            }
-        }
-        val jvmMain by getting
-        val jvmTest by getting
+kscience{
+    jvm()
+    js()
+    native()
+    wasm()
+
+    useSerialization()
+
+    dependencies{
+        api(projects.trajectoryKt)
     }
+}
+
+readme {
+    description = "Core cartography, UI-agnostic"
+    maturity = space.kscience.gradle.Maturity.DEVELOPMENT
+    propertyByTemplate("artifact", rootProject.file("docs/templates/ARTIFACT-TEMPLATE.md"))
+
+    feature(
+        id = "angles and distances",
+    ) { "Type-safe angle and distance measurements." }
+
+    feature(
+        id = "ellipsoid",
+    ) { "Ellipsoid geometry and distances" }
+
+    feature(
+        id = "mercator",
+    ) { "Mercator and web-mercator projections" }
 }

maps-kt-core/docs/README-TEMPLATE.md

@@ -0,0 +1,7 @@
+# Module kmath-core
+
+The core interfaces of KMath.
+
+${features}
+
+${artifact}

maps-kt-core/src/commonMain/kotlin/centre/sciprog/maps/GeodeticMapCoordinates.kt

@@ -1,62 +0,0 @@
-package centre.sciprog.maps
-
-import kotlin.math.PI
-
-/**
- * Geodetic coordinated
- */
-public class GeodeticMapCoordinates private constructor(public val latitude: Double, public val longitude: Double) {
-
-    override fun equals(other: Any?): Boolean {
-        if (this === other) return true
-        if (other == null || this::class != other::class) return false
-
-        other as GeodeticMapCoordinates
-
-        if (latitude != other.latitude) return false
-        if (longitude != other.longitude) return false
-
-        return true
-    }
-
-    override fun hashCode(): Int {
-        var result = latitude.hashCode()
-        result = 31 * result + longitude.hashCode()
-        return result
-    }
-
-    override fun toString(): String {
-        return "GeodeticCoordinates(latitude=${latitude / PI * 180} deg, longitude=${longitude / PI * 180} deg)"
-    }
-
-
-    public companion object {
-        public fun ofRadians(latitude: Double, longitude: Double): GeodeticMapCoordinates {
-            require(latitude in (-PI/2)..(PI/2)) { "Latitude $latitude is not in (-PI/2)..(PI/2)" }
-            return GeodeticMapCoordinates(latitude, longitude.rem(PI / 2))
-        }
-
-        public fun ofDegrees(latitude: Double, longitude: Double): GeodeticMapCoordinates {
-            require(latitude in (-90.0)..(90.0)) { "Latitude $latitude is not in -90..90" }
-            return GeodeticMapCoordinates(latitude * PI / 180, (longitude.rem(180) * PI / 180))
-        }
-    }
-}
-
-internal typealias Gmc = GeodeticMapCoordinates
-
-
-//public interface GeoToScreenConversion {
-//    public fun getScreenX(gmc: GeodeticMapCoordinates): Double
-//    public fun getScreenY(gmc: GeodeticMapCoordinates): Double
-//
-//    public fun invalidationFlow(): Flow<Unit>
-//}
-//
-//public interface ScreenMapCoordinates {
-//    public val gmc: GeodeticMapCoordinates
-//    public val converter: GeoToScreenConversion
-//
-//    public val x: Double get() = converter.getScreenX(gmc)
-//    public val y: Double get() = converter.getScreenX(gmc)
-//}

maps-kt-core/src/commonMain/kotlin/centre/sciprog/maps/GmcBox.kt

@@ -1,39 +0,0 @@
-package centre.sciprog.maps
-
-import kotlin.math.*
-
-class GmcBox(val a: GeodeticMapCoordinates, val b: GeodeticMapCoordinates)
-
-fun GmcBox(latitudes: ClosedFloatingPointRange<Double>, longitudes: ClosedFloatingPointRange<Double>) = GmcBox(
-    GeodeticMapCoordinates.ofRadians(latitudes.start, longitudes.start),
-    GeodeticMapCoordinates.ofRadians(latitudes.endInclusive, longitudes.endInclusive)
-)
-
-val GmcBox.center
-    get() = GeodeticMapCoordinates.ofRadians(
-        (a.latitude + b.latitude) / 2,
-        (a.longitude + b.longitude) / 2
-    )
-
-val GmcBox.left get() = min(a.longitude, b.longitude)
-val GmcBox.right get() = max(a.longitude, b.longitude)
-
-val GmcBox.top get() = max(a.latitude, b.latitude)
-val GmcBox.bottom get() = min(a.latitude, b.latitude)
-
-//TODO take curvature into account
-val GmcBox.width get() = abs(a.longitude - b.longitude)
-val GmcBox.height get() = abs(a.latitude - b.latitude)
-
-/**
- * Compute a minimal bounding box including all given boxes. Return null if collection is empty
- */
-fun Collection<GmcBox>.wrapAll(): GmcBox? {
-    if (isEmpty()) return null
-    //TODO optimize computation
-    val minLat = minOf { it.bottom }
-    val maxLat = maxOf { it.top }
-    val minLong = minOf { it.left }
-    val maxLong = maxOf { it.right }
-    return GmcBox(minLat..maxLat, minLong..maxLong)
-}

maps-kt-core/src/commonMain/kotlin/centre/sciprog/maps/MapViewPoint.kt

@@ -1,38 +0,0 @@
-package centre.sciprog.maps
-
-import kotlin.math.pow
-
-/**
- * Observable position on the map. Includes observation coordinate and [zoom] factor
- */
-data class MapViewPoint(
-    val focus: GeodeticMapCoordinates,
-    val zoom: Double,
-) {
-    val scaleFactor by lazy { WebMercatorProjection.scaleFactor(zoom) }
-}
-
-fun MapViewPoint.move(delta: GeodeticMapCoordinates): MapViewPoint {
-    val newCoordinates = GeodeticMapCoordinates.ofRadians(
-        (focus.latitude + delta.latitude).coerceIn(
-            -MercatorProjection.MAXIMUM_LATITUDE,
-            MercatorProjection.MAXIMUM_LATITUDE
-        ),
-        focus.longitude + delta.longitude
-    )
-    return MapViewPoint(newCoordinates, zoom)
-}
-
-fun MapViewPoint.zoom(
-    zoomDelta: Double,
-    invariant: GeodeticMapCoordinates = focus,
-): MapViewPoint = if (invariant == focus) {
-    copy(zoom = (zoom + zoomDelta).coerceIn(2.0, 18.0))
-} else {
-    val difScale = (1 - 2.0.pow(-zoomDelta))
-    val newCenter = GeodeticMapCoordinates.ofRadians(
-        focus.latitude + (invariant.latitude - focus.latitude) * difScale,
-        focus.longitude + (invariant.longitude - focus.longitude) * difScale
-    )
-    MapViewPoint(newCenter, (zoom + zoomDelta).coerceIn(2.0, 18.0))
-}

maps-kt-core/src/commonMain/kotlin/centre/sciprog/maps/MercatorProjection.kt

@@ -1,55 +0,0 @@
-/*
- * Copyright 2018-2021 KMath contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package centre.sciprog.maps
-
-import kotlin.math.*
-
-public data class MercatorCoordinates(val x: Double, val y: Double)
-
-/**
- * @param baseLongitude the longitude offset in radians
- * @param radius the average radius of the Earth
- * @param correctedRadius optional radius correction to account for ellipsoid model
- */
-public open class MercatorProjection(
-    public val baseLongitude: Double = 0.0,
-    protected val radius: Double = DEFAULT_EARTH_RADIUS,
-    private val correctedRadius: ((GeodeticMapCoordinates) -> Double)? = null,
-) {
-
-    public fun toGeodetic(mc: MercatorCoordinates): GeodeticMapCoordinates {
-        val res = GeodeticMapCoordinates.ofRadians(
-            atan(sinh(mc.y / radius)),
-            baseLongitude + mc.x / radius,
-        )
-        return if (correctedRadius != null) {
-            val r = correctedRadius.invoke(res)
-            GeodeticMapCoordinates.ofRadians(
-                atan(sinh(mc.y / r)),
-                baseLongitude + mc.x / r,
-            )
-        } else {
-            res
-        }
-    }
-
-    /**
-     * https://en.wikipedia.org/wiki/Web_Mercator_projection#Formulas
-     */
-    public fun toMercator(gmc: GeodeticMapCoordinates): MercatorCoordinates {
-        require(abs(gmc.latitude) <= MAXIMUM_LATITUDE) { "Latitude exceeds the maximum latitude for mercator coordinates" }
-        val r = correctedRadius?.invoke(gmc) ?: radius
-        return MercatorCoordinates(
-            x = r * (gmc.longitude - baseLongitude),
-            y = r * ln(tan(PI / 4 + gmc.latitude / 2))
-        )
-    }
-
-    public companion object : MercatorProjection(0.0, 6378137.0) {
-        public const val MAXIMUM_LATITUDE: Double = 85.05113
-        public val DEFAULT_EARTH_RADIUS: Double = radius
-    }
-}

maps-kt-core/src/commonMain/kotlin/space/kscience/maps/coordinates/Distance.kt

@@ -0,0 +1,23 @@
+package space.kscience.maps.coordinates
+
+import kotlinx.serialization.Serializable
+import kotlin.jvm.JvmInline
+
+@Serializable
+@JvmInline
+public value class Distance internal constructor(public val kilometers: Double) : Comparable<Distance> {
+    override fun compareTo(other: Distance): Int = this.kilometers.compareTo(other.kilometers)
+}
+
+public val Number.kilometers: Distance get() = Distance(toDouble())
+public val Number.meters: Distance get() = Distance(toDouble() / 1000)
+
+public operator fun Distance.div(other: Distance): Double = kilometers / other.kilometers
+
+public operator fun Distance.plus(other: Distance): Distance = Distance(kilometers + other.kilometers)
+public operator fun Distance.minus(other: Distance): Distance = Distance(kilometers - other.kilometers)
+
+public operator fun Distance.times(number: Number): Distance = Distance(kilometers * number.toDouble())
+public operator fun Distance.div(number: Number): Distance = Distance(kilometers / number.toDouble())
+
+public val Distance.meters: Double get() = kilometers * 1000

maps-kt-core/src/commonMain/kotlin/space/kscience/maps/coordinates/GeoEllipsoid.kt

@@ -0,0 +1,86 @@
+package space.kscience.maps.coordinates
+
+import kotlinx.serialization.Serializable
+import space.kscience.kmath.geometry.*
+import kotlin.math.*
+
+@Serializable
+public class GeoEllipsoid(public val equatorRadius: Distance, public val polarRadius: Distance) {
+
+    /**
+     * Flattening https://en.wikipedia.org/wiki/Flattening
+     */
+    public val f: Double = (equatorRadius.kilometers - polarRadius.kilometers) / equatorRadius.kilometers
+
+    /**
+     * Inverse flattening
+     */
+    public val inverseF: Double = equatorRadius.kilometers / (equatorRadius.kilometers - polarRadius.kilometers)
+
+    /**
+     *  Eccentricity squared
+     */
+    public val eSquared: Double = 2 * f - f * f
+
+    public val eccentricity: Double = sqrt(eSquared)
+
+    public companion object {
+
+        public val WGS84: GeoEllipsoid = GeoEllipsoid(
+            equatorRadius = Distance(6378.137),
+            polarRadius = Distance(6356.752314245)
+        )
+
+        public val GRS80: GeoEllipsoid = GeoEllipsoid(
+            equatorRadius = Distance(6378.137),
+            polarRadius = Distance(6356.752314140)
+        )
+
+        public val sphere: GeoEllipsoid = GeoEllipsoid(
+            equatorRadius = Distance(6378.137),
+            polarRadius = Distance(6378.137)
+        )
+
+
+    }
+}
+
+/**
+ * A radius of circle normal to the axis of the ellipsoid at given latitude
+ */
+public fun GeoEllipsoid.reducedRadius(latitude: Angle): Distance {
+    val reducedLatitudeTan = (1 - f) * tan(latitude)
+    return equatorRadius / sqrt(1.0 + reducedLatitudeTan.pow(2))
+}
+
+
+/**
+ * Compute distance between two map points using giv
+ * https://en.wikipedia.org/wiki/Geographical_distance#Lambert's_formula_for_long_lines
+ */
+public fun GeoEllipsoid.lambertDistanceBetween(r1: Gmc, r2: Gmc): Distance {
+
+    /**
+     * https://en.wikipedia.org/wiki/Great-circle_distance
+     */
+    fun greatCircleAngleBetween(
+        r1: Gmc,
+        r2: Gmc,
+    ): Radians = acos(
+        sin(r1.latitude) * sin(r2.latitude) +
+                cos(r1.latitude) * cos(r2.latitude) *
+                cos(r1.longitude - r2.longitude)
+    ).radians
+
+    val s = greatCircleAngleBetween(r1, r2)
+
+    val b1: Double = (1 - f) * tan(r1.latitude)
+    val b2: Double = (1 - f) * tan(r2.latitude)
+    val p = (b1 + b2) / 2
+    val q = (b2 - b1) / 2
+
+    val x = (s.value - sin(s)) * sin(p).pow(2) * cos(q).pow(2) / cos(s / 2).pow(2)
+    val y = (s.value + sin(s)) * cos(p).pow(2) * sin(q).pow(2) / sin(s / 2).pow(2)
+
+    return equatorRadius * (s.value - f / 2 * (x + y))
+}

maps-kt-core/src/commonMain/kotlin/space/kscience/maps/coordinates/GeodeticMapCoordinates.kt

@@ -0,0 +1,91 @@
+package space.kscience.maps.coordinates
+
+import kotlinx.serialization.Serializable
+import space.kscience.kmath.geometry.*
+
+/**
+ * Geodetic coordinated
+ *
+ * @param elevation is optional
+ */
+@Serializable
+public class GeodeticMapCoordinates(
+    public val latitude: Angle,
+    public val longitude: Angle,
+    public val elevation: Distance? = null,
+) : Vector2D<Angle> {
+    init {
+        require(latitude in (-Angle.piDiv2)..(Angle.piDiv2)) {
+            "Latitude $latitude is not in (-PI/2)..(PI/2)"
+        }
+        require(longitude in (-Angle.pi..Angle.pi)) {
+            "Longitude $longitude is not in (-PI..PI) range"
+        }
+    }
+    override val x: Angle get() = longitude
+
+    override val y: Angle get() = latitude
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other == null || this::class != other::class) return false
+
+        other as GeodeticMapCoordinates
+
+        return latitude == other.latitude && longitude == other.longitude
+    }
+
+    override fun hashCode(): Int {
+        var result = latitude.hashCode()
+        result = 31 * result + longitude.hashCode()
+        return result
+    }
+
+    override fun toString(): String {
+        return "GMC(latitude=${latitude.toDegrees().value} deg, longitude=${longitude.toDegrees().value} deg)"
+    }
+
+
+    public companion object {
+        public fun normalized(
+            latitude: Angle,
+            longitude: Angle,
+            elevation: Distance? = null,
+        ): GeodeticMapCoordinates = GeodeticMapCoordinates(
+            latitude.coerceIn(-Angle.piDiv2..Angle.piDiv2), longitude.normalized(Angle.zero), elevation
+        )
+
+        public fun ofRadians(
+            latitude: Double,
+            longitude: Double,
+            elevation: Distance? = null,
+        ): GeodeticMapCoordinates = normalized(latitude.radians, longitude.radians, elevation)
+
+        public fun ofDegrees(
+            latitude: Double,
+            longitude: Double,
+            elevation: Distance? = null,
+        ): GeodeticMapCoordinates = normalized(latitude.degrees, longitude.degrees, elevation)
+    }
+}
+
+
+/**
+ * Short name for GeodeticMapCoordinates
+ */
+public typealias Gmc = GeodeticMapCoordinates
+
+//public interface GeoToScreenConversion {
+//    public fun getScreenX(gmc: GeodeticMapCoordinates): Double
+//    public fun getScreenY(gmc: GeodeticMapCoordinates): Double
+//
+//    public fun invalidationFlow(): Flow<Unit>
+//}
+//
+//public interface ScreenMapCoordinates {
+//    public val gmc: GeodeticMapCoordinates
+//    public val converter: GeoToScreenConversion
+//
+//    public val x: Double get() = converter.getScreenX(gmc)
+//    public val y: Double get() = converter.getScreenX(gmc)
+//}

maps-kt-core/src/commonMain/kotlin/space/kscience/maps/coordinates/GmcCurve.kt

@@ -0,0 +1,358 @@
+package space.kscience.maps.coordinates
+
+import space.kscience.kmath.geometry.*
+import kotlin.math.*
+
+/**
+ * A directed straight (geodetic) segment on a spheroid with given start, direction, end point and distance.
+ * @param forward coordinate of a start point with the forward direction
+ * @param backward coordinate of an end point with the backward direction
+ */
+public class GmcCurve internal constructor(
+    public val forward: GmcPose,
+    public val backward: GmcPose,
+    public val distance: Distance,
+){
+    override fun toString(): String {
+        return "GmcCurve(from: ${forward.coordinates}, to: ${backward.coordinates})"
+    }
+}
+
+public operator fun  ClosedRange<Radians>.contains(angle: Angle): Boolean = contains(angle.toRadians())
+
+/**
+ * Reverse direction and order of ends
+ */
+public fun GmcCurve.reversed(): GmcCurve = GmcCurve(backward.reversed(), forward.reversed(), distance)
+
+/**
+ * Compute a curve alongside a meridian
+ */
+public fun GeoEllipsoid.meridianCurve(
+    longitude: Angle,
+    fromLatitude: Angle,
+    toLatitude: Angle,
+    step: Radians = 0.015.radians,
+): GmcCurve {
+    require(fromLatitude in (-Angle.piDiv2)..(Angle.piDiv2)) { "Latitude must be in (-90, 90) degrees range" }
+    require(toLatitude in (-Angle.piDiv2)..(Angle.piDiv2)) { "Latitude must be in (-90, 90) degrees range" }
+
+    fun smallDistance(from: Radians, to: Radians): Distance = equatorRadius *
+            (1 - eSquared) *
+            (1 - eSquared * sin(from).pow(2)).pow(-1.5) *
+            abs((from - to).value)
+
+    val up = toLatitude > fromLatitude
+
+    val integrateFrom: Radians
+    val integrateTo: Radians
+
+    if (up) {
+        integrateFrom = fromLatitude.toRadians()
+        integrateTo = toLatitude.toRadians()
+    } else {
+        integrateTo = fromLatitude.toRadians()
+        integrateFrom = toLatitude.toRadians()
+    }
+
+    var current: Radians = integrateFrom
+    var s = Distance(0.0)
+    while (current < integrateTo) {
+        val next = minOf(current + step, integrateTo)
+        s += smallDistance(current, next)
+        current = next
+    }
+
+    return GmcCurve(
+        forward = GmcPose(GeodeticMapCoordinates.normalized(fromLatitude, longitude), if (up) Angle.zero else Angle.pi),
+        backward = GmcPose(GeodeticMapCoordinates.normalized(toLatitude, longitude), if (up) Angle.pi else Angle.zero),
+        distance = s
+    )
+}
+
+/**
+ * Compute a curve alongside a parallel
+ */
+public fun GeoEllipsoid.parallelCurve(latitude: Angle, fromLongitude: Angle, toLongitude: Angle): GmcCurve {
+    require(latitude in (-Angle.piDiv2)..(Angle.piDiv2)) { "Latitude must be in (-90, 90) degrees range" }
+    val right = toLongitude > fromLongitude
+    return GmcCurve(
+        forward = GmcPose(GeodeticMapCoordinates.normalized(latitude, fromLongitude), if (right) Angle.piDiv2 else -Angle.piDiv2),
+        backward = GmcPose(GeodeticMapCoordinates.normalized(latitude, toLongitude), if (right) -Angle.piDiv2 else Angle.piDiv2),
+        distance = reducedRadius(latitude) * abs((fromLongitude - toLongitude).toRadians().value)
+    )
+}
+
+
+/**
+ * Taken from https://github.com/mgavaghan/geodesy
+ * https://github.com/mgavaghan/geodesy/blob/ab1c6969dc964ff34929911f055b27525909ef3f/src/main/java/org/gavaghan/geodesy/GeodeticCalculator.java#L58
+ *
+ * Calculate the destination and final bearing after traveling a specified
+ * distance, and a specified starting bearing, for an initial location. This
+ * is the solution to the direct geodetic problem.
+ *
+ * @param start starting location
+ * @return solution to the direct geodetic problem
+ */
+@Suppress("SpellCheckingInspection", "LocalVariableName")
+public fun GeoEllipsoid.curveInDirection(
+    start: GmcPose,
+    distance: Distance,
+    precision: Double = 1e-6,
+): GmcCurve {
+    val a: Distance = equatorRadius
+    val b: Distance = polarRadius
+    val aSquared: Double = a.kilometers.pow(2)
+    val bSquared: Double = b.kilometers.pow(2)
+    val phi1 = start.latitude
+    val alpha1 = start.bearing
+    val cosAlpha1: Double = cos(alpha1)
+    val sinAlpha1: Double = sin(alpha1)
+    val tanU1: Double = (1.0 - f) * tan(phi1)
+    val cosU1: Double = 1.0 / sqrt(1.0 + tanU1 * tanU1)
+    val sinU1 = tanU1 * cosU1
+
+    // eq. 1
+    val sigma1: Radians = atan2(tanU1, cosAlpha1).radians
+
+    // eq. 2
+    val sinAlpha: Double = cosU1 * sinAlpha1
+    val sin2Alpha = sinAlpha * sinAlpha
+    val cos2Alpha = 1 - sin2Alpha
+    val uSquared = cos2Alpha * (aSquared - bSquared) / bSquared
+
+    // eq. 3
+    val A: Double = 1 + uSquared / 16384 * (4096 + uSquared * (-768 + uSquared * (320 - 175 * uSquared)))
+
+    // eq. 4
+    val B: Double = uSquared / 1024 * (256 + uSquared * (-128 + uSquared * (74 - 47 * uSquared)))
+
+    // iterate until there is a negligible change in sigma
+    val sOverbA: Radians = (distance / b / A).radians
+    var sigma: Radians = sOverbA
+    var sinSigma: Double
+    var prevSigma: Radians = sOverbA
+    var sigmaM2: Radians
+    var cosSigmaM2: Double
+    var cos2SigmaM2: Double
+    while (!prevSigma.value.isNaN()) {
+        // eq. 5
+        sigmaM2 = sigma1 * 2.0 + sigma
+        cosSigmaM2 = cos(sigmaM2)
+        cos2SigmaM2 = cosSigmaM2 * cosSigmaM2
+        sinSigma = sin(sigma)
+//        val cosSigma: Double = cos(sigma)
+
+        // eq. 6
+        val deltaSigma = B * sinSigma *
+                (cosSigmaM2 + B / 4.0 * (cos(sigma) * (-1 + 2 * cos2SigmaM2) -
+                        B / 6.0 * cosSigmaM2 * (-3 + 4 * sinSigma * sinSigma) * (-3 + 4 * cos2SigmaM2)))
+
+        // eq. 7
+        sigma = sOverbA + deltaSigma.radians
+
+        // break after converging to tolerance
+        if (abs((sigma - prevSigma).value) < precision) break
+        prevSigma = sigma
+    }
+    sigmaM2 = sigma1 * 2.0 + sigma
+    cosSigmaM2 = cos(sigmaM2)
+    cos2SigmaM2 = cosSigmaM2 * cosSigmaM2
+    val cosSigma: Double = cos(sigma)
+    sinSigma = sin(sigma)
+
+    // eq. 8
+    val phi2: Radians = atan2(
+        sinU1 * cosSigma + cosU1 * sinSigma * cosAlpha1,
+        (1.0 - f) * sqrt(
+            sin2Alpha + (sinU1 * sinSigma - cosU1 * cosSigma * cosAlpha1).pow(2)
+        )
+    ).radians
+
+    // eq. 9
+    // This fixes the pole crossing defect spotted by Matt Feemster. When a
+    // path passes a pole and essentially crosses a line of latitude twice -
+    // once in each direction - the longitude calculation got messed up.
+    //
+    // Using atan2 instead of atan fixes the defect. The change is in the
+    // next 3 lines.
+    //
+    // double tanLambda = sinSigma * sinAlpha1 / (cosU1 * cosSigma - sinU1 *
+    // sinSigma * cosAlpha1);
+    // double lambda = Math.atan(tanLambda);
+    val lambda: Double = atan2(
+        sinSigma * sinAlpha1,
+        cosU1 * cosSigma - sinU1 * sinSigma * cosAlpha1
+    )
+
+    // eq. 10
+    val C = f / 16 * cos2Alpha * (4 + f * (4 - 3 * cos2Alpha))
+
+    // eq. 11
+    val L = lambda - (1 - C) * f * sinAlpha *
+            (sigma.value + C * sinSigma * (cosSigmaM2 + C * cosSigma * (-1 + 2 * cos2SigmaM2)))
+
+    val endPoint = GeodeticMapCoordinates.normalized(phi2, start.longitude + L.radians)
+
+    // eq. 12
+
+    return GmcCurve(
+        start,
+        GmcPose(
+            endPoint,
+            atan2(sinAlpha, -sinU1 * sinSigma + cosU1 * cosSigma * cosAlpha1).radians
+        ),
+        distance
+    )
+}
+
+/**
+ * Taken from https://github.com/mgavaghan/geodesy
+ *
+ * Calculate the geodetic curve between two points on a specified reference
+ * ellipsoid. This is the solution to the inverse geodetic problem.
+ *
+ * @receiver reference ellipsoid to use
+ * @param start starting coordinates
+ * @param end ending coordinates
+ * @return solution to the inverse geodetic problem
+ */
+@Suppress("SpellCheckingInspection", "LocalVariableName")
+public fun GeoEllipsoid.curveBetween(start: Gmc, end: Gmc, precision: Double = 1e-6): GmcCurve {
+    //
+    // All equation numbers refer back to Vincenty's publication:
+    // See http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf
+    //
+
+    // get constants
+    val a = equatorRadius
+    val b = polarRadius
+
+    if(start == end) error("Can't compute a curve because start and end coincide at $start")
+
+    // get parameters as radians
+    val phi1 = start.latitude
+    val lambda1 = start.longitude
+    val phi2 = end.latitude
+    val lambda2 = end.longitude
+
+    // calculations
+    val a2 = a.kilometers * a.kilometers
+    val b2 = b.kilometers * b.kilometers
+    val a2b2b2 = (a2 - b2) / b2
+    val omega: Angle = lambda2 - lambda1
+    val tanphi1: Double = tan(phi1)
+    val tanU1 = (1.0 - f) * tanphi1
+    val U1: Double = atan(tanU1)
+    val sinU1: Double = sin(U1)
+    val cosU1: Double = cos(U1)
+    val tanphi2: Double = tan(phi2)
+    val tanU2 = (1.0 - f) * tanphi2
+    val U2: Double = atan(tanU2)
+    val sinU2: Double = sin(U2)
+    val cosU2: Double = cos(U2)
+    val sinU1sinU2 = sinU1 * sinU2
+    val cosU1sinU2 = cosU1 * sinU2
+    val sinU1cosU2 = sinU1 * cosU2
+    val cosU1cosU2 = cosU1 * cosU2
+
+    // eq. 13
+    var lambda: Angle = omega
+
+    // intermediates we'll need to compute 's'
+    var A = 0.0
+
+    var sigma = 0.0
+    var deltasigma = 0.0
+    var lambda0: Angle
+    var converged = false
+    for (i in 0..19) {
+        lambda0 = lambda
+        val sinlambda: Double = sin(lambda)
+        val coslambda: Double = cos(lambda)
+
+        // eq. 14
+        val sin2sigma =
+            cosU2 * sinlambda * cosU2 * sinlambda + (cosU1sinU2 - sinU1cosU2 * coslambda) * (cosU1sinU2 - sinU1cosU2 * coslambda)
+        val sinsigma: Double = sqrt(sin2sigma)
+
+        // eq. 15
+        val cossigma = sinU1sinU2 + cosU1cosU2 * coslambda
+
+        // eq. 16
+        sigma = atan2(sinsigma, cossigma)
+
+        // eq. 17 Careful! sin2sigma might be almost 0!
+        val sinalpha = if (sin2sigma == 0.0) 0.0 else cosU1cosU2 * sinlambda / sinsigma
+        val alpha: Double = asin(sinalpha)
+        val cosalpha: Double = cos(alpha)
+        val cos2alpha = cosalpha * cosalpha
+
+        // eq. 18 Careful! cos2alpha might be almost 0!
+        val cos2sigmam = if (cos2alpha == 0.0) 0.0 else cossigma - 2 * sinU1sinU2 / cos2alpha
+        val u2 = cos2alpha * a2b2b2
+        val cos2sigmam2 = cos2sigmam * cos2sigmam
+
+        // eq. 3
+        A = 1.0 + u2 / 16384 * (4096 + u2 * (-768 + u2 * (320 - 175 * u2)))
+
+        // eq. 4
+        val B = u2 / 1024 * (256 + u2 * (-128 + u2 * (74 - 47 * u2)))
+
+        // eq. 6
+        deltasigma =
+            B * sinsigma * (cos2sigmam + B / 4 * (cossigma * (-1 + 2 * cos2sigmam2) - B / 6 * cos2sigmam * (-3 + 4 * sin2sigma) * (-3 + 4 * cos2sigmam2)))
+
+        // eq. 10
+        val C = f / 16 * cos2alpha * (4 + f * (4 - 3 * cos2alpha))
+
+        // eq. 11 (modified)
+        lambda = omega + (
+                (1 - C) * f * sinalpha *
+                        (sigma + C * sinsigma * (cos2sigmam + C * cossigma * (-1 + 2 * cos2sigmam2)))
+                ).radians
+
+        // see how much improvement we got
+        val change: Double = abs((lambda - lambda0) / lambda)
+        if (i > 1 && change < precision) {
+            converged = true
+            break
+        }
+    }
+
+    // eq. 19
+    val s: Distance = b * A * (sigma - deltasigma)
+    val alpha1: Radians
+    val alpha2: Radians
+
+    // didn't converge? must be N/S
+    if (!converged) {
+        if (phi1 > phi2) {
+            alpha1 = Angle.pi.toRadians()
+            alpha2 = 0.0.radians
+        } else if (phi1 < phi2) {
+            alpha1 = 0.0.radians
+            alpha2 = Angle.pi.toRadians()
+        } else {
+            error("Start and end point coinside.")
+        }
+    } else {
+        // eq. 20
+        alpha1 = atan2(
+            cosU2 * sin(lambda),
+            cosU1sinU2 - sinU1cosU2 * cos(lambda)
+        ).radians
+
+        // eq. 21
+        alpha2 = atan2(
+            cosU1 * sin(lambda),
+            -sinU1cosU2 + cosU1sinU2 * cos(lambda)
+        ).radians + Angle.pi
+    }
+    return GmcCurve(
+        GmcPose(start, alpha1),
+        GmcPose(end, alpha2),
+        s
+    )
+}

maps-kt-core/src/commonMain/kotlin/space/kscience/maps/coordinates/GmcPose.kt

@@ -0,0 +1,17 @@
+package space.kscience.maps.coordinates
+
+import kotlinx.serialization.Serializable
+import space.kscience.kmath.geometry.Angle
+import space.kscience.kmath.geometry.normalized
+
+/**
+ * A coordinate-bearing pair
+ */
+@Serializable
+public data class GmcPose(val coordinates: GeodeticMapCoordinates, val bearing: Angle) {
+    val latitude: Angle get() = coordinates.latitude
+    val longitude: Angle get() = coordinates.longitude
+}
+
+public fun GmcPose.reversed(): GmcPose = copy(bearing = (bearing + Angle.pi).normalized())
+

maps-kt-core/src/commonMain/kotlin/space/kscience/maps/coordinates/MercatorProjection.kt

@@ -0,0 +1,96 @@
+/*
+ * Copyright 2018-2021 KMath contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package space.kscience.maps.coordinates
+
+import kotlinx.serialization.Serializable
+import space.kscience.kmath.geometry.*
+import kotlin.math.*
+
+public data class ProjectionCoordinates(val x: Distance, val y: Distance)
+
+/**
+ * @param T the type of projection coordinates
+ */
+public interface MapProjection<T : Any> {
+    public fun toGeodetic(pc: T): GeodeticMapCoordinates
+    public fun toProjection(gmc: GeodeticMapCoordinates): T
+
+    public companion object {
+        public val epsg3857: MercatorProjection = MercatorProjection()
+    }
+}
+
+
+/**
+ * @param baseLongitude the longitude offset in radians
+ * @param ellipsoid - a [GeoEllipsoid] to be used for conversion
+ */
+@Serializable
+public open class MercatorProjection(
+    public val baseLongitude: Angle = Angle.zero,
+    public val ellipsoid: GeoEllipsoid = GeoEllipsoid.sphere,
+) : MapProjection<ProjectionCoordinates> {
+
+
+    /**
+     * Taken from https://github.com/geotools/geotools/blob/main/modules/library/referencing/src/main/java/org/geotools/referencing/operation/projection/Mercator.java#L164
+     */
+    private fun cphi2(ts: Double): Double {
+        val eccnth: Double = 0.5 * ellipsoid.eccentricity
+        var phi: Double = PI / 2 - 2.0 * atan(ts)
+        for (i in 0 until 15) {
+            val con: Double = ellipsoid.eccentricity * sin(phi)
+            val dphi: Double = PI / 2 - 2.0 * atan(ts * ((1 - con) / (1 + con)).pow(eccnth)) - phi
+            phi += dphi
+            if (abs(dphi) <= 1e-10) {
+                return phi
+            }
+        }
+        error("Inverse mercator projection transformation failed to converge")
+    }
+
+
+    override fun toGeodetic(pc: ProjectionCoordinates): GeodeticMapCoordinates {
+        return if (ellipsoid === GeoEllipsoid.sphere) {
+            GeodeticMapCoordinates.ofRadians(
+                atan(sinh(pc.y / ellipsoid.equatorRadius)),
+                baseLongitude.toRadians().value + (pc.x / ellipsoid.equatorRadius),
+            )
+        } else {
+            GeodeticMapCoordinates.ofRadians(
+                cphi2(exp(-(pc.y / ellipsoid.equatorRadius))),
+                baseLongitude.toRadians().value + (pc.x / ellipsoid.equatorRadius)
+            )
+        }
+    }
+
+    /**
+     * https://en.wikipedia.org/wiki/Web_Mercator_projection#Formulas
+     */
+    override fun toProjection(gmc: GeodeticMapCoordinates): ProjectionCoordinates {
+        require(abs(gmc.latitude) <= MAXIMUM_LATITUDE) { "Latitude exceeds the maximum latitude for mercator coordinates" }
+        val e = sqrt(ellipsoid.eSquared)
+
+        return if (ellipsoid === GeoEllipsoid.sphere) {
+            ProjectionCoordinates(
+                x = ellipsoid.equatorRadius * (gmc.longitude - baseLongitude).toRadians().value,
+                y = ellipsoid.equatorRadius * ln(tan(Angle.pi / 4 + gmc.latitude / 2))
+            )
+        } else {
+            val sinPhi = sin(gmc.latitude)
+            ProjectionCoordinates(
+                x = ellipsoid.equatorRadius * (gmc.longitude - baseLongitude).toRadians().value,
+                y = ellipsoid.equatorRadius * ln(
+                    tan(Angle.pi / 4 + gmc.latitude / 2) * ((1 - e * sinPhi) / (1 + e * sinPhi)).pow(e / 2)
+                )
+            )
+        }
+    }
+
+    public companion object {
+        public val MAXIMUM_LATITUDE: Angle = 85.05113.degrees
+    }
+}

maps-kt-core/src/commonMain/kotlin/space/kscience/maps/coordinates/WebMercatorProjection.kt

@@ -3,21 +3,22 @@
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-package centre.sciprog.maps
+package space.kscience.maps.coordinates
 
+import space.kscience.kmath.geometry.abs
 import kotlin.math.*
 
-public data class WebMercatorCoordinates(val zoom: Int, val x: Double, val y: Double)
+public data class WebMercatorCoordinates(val zoom: Int, val x: Float, val y: Float)
 
-public object WebMercatorProjection  {
+public object WebMercatorProjection {
 
     /**
      * Compute radians to projection coordinates ratio for given [zoom] factor
      */
-    public fun scaleFactor(zoom: Double) = 256.0 / 2 / PI * 2.0.pow(zoom)
+    public fun scaleFactor(zoom: Float): Float = (256.0 / 2 / PI * 2f.pow(zoom)).toFloat()
 
     public fun toGeodetic(mercator: WebMercatorCoordinates): GeodeticMapCoordinates {
-        val scaleFactor = scaleFactor(mercator.zoom.toDouble())
+        val scaleFactor = scaleFactor(mercator.zoom.toFloat())
         val longitude = mercator.x / scaleFactor - PI
         val latitude = (atan(exp(PI - mercator.y / scaleFactor)) - PI / 4) * 2
         return GeodeticMapCoordinates.ofRadians(latitude, longitude)
@@ -25,15 +26,17 @@ public object WebMercatorProjection  {
 
     /**
      * https://en.wikipedia.org/wiki/Web_Mercator_projection#Formulas
+     *
+     * return null if gmc is outside of possible coordinate scope for WebMercator
      */
-    public fun toMercator(gmc: GeodeticMapCoordinates, zoom: Int): WebMercatorCoordinates {
-        require(abs(gmc.latitude) <= MercatorProjection.MAXIMUM_LATITUDE) { "Latitude exceeds the maximum latitude for mercator coordinates" }
+    public fun toMercator(gmc: GeodeticMapCoordinates, zoom: Int): WebMercatorCoordinates? {
+        if (abs(gmc.latitude) > MercatorProjection.MAXIMUM_LATITUDE) return null
 
-        val scaleFactor = scaleFactor(zoom.toDouble())
+        val scaleFactor = scaleFactor(zoom.toFloat())
         return WebMercatorCoordinates(
             zoom = zoom,
-            x = scaleFactor * (gmc.longitude + PI),
-            y = scaleFactor * (PI - ln(tan(PI / 4 + gmc.latitude / 2)))
+            x = scaleFactor * (gmc.longitude.toRadians().value + PI).toFloat(),
+            y = scaleFactor * (PI - ln(tan(PI / 4 + gmc.latitude.toRadians().value / 2))).toFloat()
         )
     }
 

maps-kt-core/src/commonTest/kotlin/space/kscience/maps/coordinates/DistanceTest.kt

@@ -0,0 +1,36 @@
+package space.kscience.maps.coordinates
+
+import space.kscience.kmath.geometry.radians
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+internal class DistanceTest {
+    companion object {
+        val moscow = GeodeticMapCoordinates.ofDegrees(55.76058287719673, 37.60358622841869)
+        val spb = GeodeticMapCoordinates.ofDegrees(59.926686023580444, 30.36038109122013)
+    }
+
+    @Test
+    fun ellipsoidParameters() {
+        assertEquals(298.257223563, GeoEllipsoid.WGS84.inverseF, 1e-6)
+    }
+
+    @Test
+    fun curveBetween() {
+        val curve = GeoEllipsoid.WGS84.curveBetween(moscow, spb)
+        val distance = curve.distance
+
+        assertEquals(632.035426877, distance.kilometers, 0.0001)
+        assertEquals(-0.6947937116552751, curve.forward.bearing.toRadians().value, 0.0001)
+    }
+
+    @Test
+    fun curveInDirection() {
+        val curve = GeoEllipsoid.WGS84.curveInDirection(
+            GmcPose(moscow, (-0.6947937116552751).radians), Distance(632.035426877)
+        )
+
+        assertEquals(spb.latitude.toRadians().value, curve.backward.latitude.toRadians().value, 0.0001)
+        assertEquals(spb.longitude.toRadians().value, curve.backward.longitude.toRadians().value, 0.0001)
+    }
+}

maps-kt-core/src/commonTest/kotlin/space/kscience/maps/coordinates/MercatorTest.kt

@@ -0,0 +1,28 @@
+package space.kscience.maps.coordinates
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class MercatorTest {
+    @Test
+    fun sphereForwardBackward(){
+        val moscow = GeodeticMapCoordinates.ofDegrees(55.76058287719673, 37.60358622841869)
+        val mercator = MapProjection.epsg3857.toProjection(moscow)
+        //https://epsg.io/transform#s_srs=4326&t_srs=3857&x=37.6035862&y=55.7605829
+        assertEquals(4186.0120709, mercator.x.kilometers, 1e-4)
+        assertEquals(7510.9013658, mercator.y.kilometers, 1e-4)
+        val backwards = MapProjection.epsg3857.toGeodetic(mercator)
+        assertEquals(moscow.latitude.toDegrees().value, backwards.latitude.toDegrees().value, 1e-6)
+        assertEquals(moscow.longitude.toDegrees().value, backwards.longitude.toDegrees().value, 1e-6)
+    }
+
+    @Test
+    fun ellipseForwardBackward(){
+        val moscow = GeodeticMapCoordinates.ofDegrees(55.76058287719673, 37.60358622841869)
+        val projection = MercatorProjection(ellipsoid = GeoEllipsoid.WGS84)
+        val mercator = projection.toProjection(moscow)
+        val backwards = projection.toGeodetic(mercator)
+        assertEquals(moscow.latitude.toDegrees().value, backwards.latitude.toDegrees().value, 1e-6)
+        assertEquals(moscow.longitude.toDegrees().value, backwards.longitude.toDegrees().value, 1e-6)
+    }
+}

maps-kt-features/README.md

@@ -0,0 +1,21 @@
+# Module maps-kt-features
+
+
+
+## Usage
+
+## Artifact:
+
+The Maven coordinates of this project are `space.kscience:maps-kt-features:0.3.0`.
+
+**Gradle Kotlin DSL:**
+```kotlin
+repositories {
+    maven("https://repo.kotlin.link")
+    mavenCentral()
+}
+
+dependencies {
+    implementation("space.kscience:maps-kt-features:0.3.0")
+}
+```

maps-kt-features/api/maps-kt-features.api

@@ -0,0 +1,765 @@
+public abstract interface class center/sciprog/attributes/Attribute {
+}
+
+public abstract interface class center/sciprog/attributes/AttributeWithDefault : center/sciprog/attributes/Attribute {
+	public abstract fun getDefault ()Ljava/lang/Object;
+}
+
+public final class center/sciprog/attributes/Attributes {
+	public static final field Companion Lcenter/sciprog/attributes/Attributes$Companion;
+	public static final synthetic fun box-impl (Ljava/util/Map;)Lcenter/sciprog/attributes/Attributes;
+	public fun equals (Ljava/lang/Object;)Z
+	public static fun equals-impl (Ljava/util/Map;Ljava/lang/Object;)Z
+	public static final fun equals-impl0 (Ljava/util/Map;Ljava/util/Map;)Z
+	public static final fun get-impl (Ljava/util/Map;Lcenter/sciprog/attributes/Attribute;)Ljava/lang/Object;
+	public final fun getContent ()Ljava/util/Map;
+	public static final fun getKeys-impl (Ljava/util/Map;)Ljava/util/Set;
+	public fun hashCode ()I
+	public static fun hashCode-impl (Ljava/util/Map;)I
+	public fun toString ()Ljava/lang/String;
+	public static fun toString-impl (Ljava/util/Map;)Ljava/lang/String;
+	public final synthetic fun unbox-impl ()Ljava/util/Map;
+}
+
+public final class center/sciprog/attributes/Attributes$Companion {
+	public final fun getEMPTY-hlWAoAs ()Ljava/util/Map;
+}
+
+public final class center/sciprog/attributes/AttributesBuilder {
+	public static final field $stable I
+	public fun <init> ()V
+	public final fun add (Lcenter/sciprog/attributes/SetAttribute;Ljava/lang/Object;)V
+	public final fun build-hlWAoAs ()Ljava/util/Map;
+	public final fun from-xbryb2s (Ljava/util/Map;)V
+	public final fun get (Lcenter/sciprog/attributes/Attribute;)Ljava/lang/Object;
+	public final fun invoke (Lcenter/sciprog/attributes/Attribute;Ljava/lang/Object;)V
+	public final fun remove (Lcenter/sciprog/attributes/SetAttribute;Ljava/lang/Object;)V
+}
+
+public final class center/sciprog/attributes/AttributesBuilderKt {
+	public static final fun Attributes (Lkotlin/jvm/functions/Function1;)Ljava/util/Map;
+	public static final fun AttributesBuilder-xbryb2s (Ljava/util/Map;)Lcenter/sciprog/attributes/AttributesBuilder;
+}
+
+public final class center/sciprog/attributes/AttributesKt {
+	public static final fun Attributes (Lcenter/sciprog/attributes/Attribute;Ljava/lang/Object;)Ljava/util/Map;
+	public static final fun getOrDefault-hZ80nBk (Ljava/util/Map;Lcenter/sciprog/attributes/AttributeWithDefault;)Ljava/lang/Object;
+	public static final fun getZ (Lcenter/sciprog/maps/features/Feature;)F
+	public static final fun isEmpty-xbryb2s (Ljava/util/Map;)Z
+	public static final fun plus-0GKEh6s (Ljava/util/Map;Ljava/util/Map;)Ljava/util/Map;
+	public static final fun withAttribute-svNjpeE (Ljava/util/Map;Lcenter/sciprog/attributes/Attribute;Ljava/lang/Object;)Ljava/util/Map;
+	public static final fun withAttributeElement-svNjpeE (Ljava/util/Map;Lcenter/sciprog/attributes/SetAttribute;Ljava/lang/Object;)Ljava/util/Map;
+	public static final fun withoutAttributeElement-svNjpeE (Ljava/util/Map;Lcenter/sciprog/attributes/SetAttribute;Ljava/lang/Object;)Ljava/util/Map;
+}
+
+public final class center/sciprog/attributes/AttributesSerializer : kotlinx/serialization/KSerializer {
+	public static final field $stable I
+	public fun <init> (Ljava/util/Set;)V
+	public synthetic fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Ljava/lang/Object;
+	public fun deserialize-7icwqAM (Lkotlinx/serialization/encoding/Decoder;)Ljava/util/Map;
+	public fun getDescriptor ()Lkotlinx/serialization/descriptors/SerialDescriptor;
+	public synthetic fun serialize (Lkotlinx/serialization/encoding/Encoder;Ljava/lang/Object;)V
+	public fun serialize-izrVrxc (Lkotlinx/serialization/encoding/Encoder;Ljava/util/Map;)V
+}
+
+public final class center/sciprog/attributes/NameAttribute : center/sciprog/attributes/SerializableAttribute {
+	public static final field $stable I
+	public static final field INSTANCE Lcenter/sciprog/attributes/NameAttribute;
+}
+
+public abstract class center/sciprog/attributes/SerializableAttribute : center/sciprog/attributes/Attribute {
+	public static final field $stable I
+	public fun <init> (Ljava/lang/String;Lkotlinx/serialization/KSerializer;)V
+	public final fun getSerialId ()Ljava/lang/String;
+	public final fun getSerializer ()Lkotlinx/serialization/KSerializer;
+	public fun toString ()Ljava/lang/String;
+}
+
+public abstract interface class center/sciprog/attributes/SetAttribute : center/sciprog/attributes/Attribute {
+}
+
+public final class center/sciprog/maps/compose/ClickGesturesKt {
+	public static final fun detectClicks (Landroidx/compose/ui/input/pointer/PointerInputScope;Lkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function3;Lkotlin/jvm/functions/Function2;Lkotlin/coroutines/Continuation;)Ljava/lang/Object;
+	public static synthetic fun detectClicks$default (Landroidx/compose/ui/input/pointer/PointerInputScope;Lkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function3;Lkotlin/jvm/functions/Function2;Lkotlin/coroutines/Continuation;ILjava/lang/Object;)Ljava/lang/Object;
+	public static final fun getPosition (Landroidx/compose/ui/input/pointer/PointerEvent;)J
+}
+
+public final class center/sciprog/maps/compose/MapControlsKt {
+	public static final fun mapControls (Landroidx/compose/ui/Modifier;Lcenter/sciprog/maps/features/CoordinateViewScope;Lcenter/sciprog/maps/features/FeatureGroup;)Landroidx/compose/ui/Modifier;
+}
+
+public final class center/sciprog/maps/features/AlphaAttribute : center/sciprog/attributes/Attribute {
+	public static final field $stable I
+	public static final field INSTANCE Lcenter/sciprog/maps/features/AlphaAttribute;
+}
+
+public final class center/sciprog/maps/features/ArcFeature : center/sciprog/maps/features/DraggableFeature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Ljava/util/Map;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Ljava/util/Map;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Lcenter/sciprog/maps/features/Rectangle;
+	public final fun component3 ()Lspace/kscience/kmath/geometry/Angle;
+	public final fun component4 ()Lspace/kscience/kmath/geometry/Angle;
+	public final fun component5-hlWAoAs ()Ljava/util/Map;
+	public final fun copy-CqjioLk (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Ljava/util/Map;)Lcenter/sciprog/maps/features/ArcFeature;
+	public static synthetic fun copy-CqjioLk$default (Lcenter/sciprog/maps/features/ArcFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Ljava/util/Map;ILjava/lang/Object;)Lcenter/sciprog/maps/features/ArcFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public final fun getArcLength ()Lspace/kscience/kmath/geometry/Angle;
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public final fun getOval ()Lcenter/sciprog/maps/features/Rectangle;
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun getStartAngle ()Lspace/kscience/kmath/geometry/Angle;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+	public fun withCoordinates (Ljava/lang/Object;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public abstract interface class center/sciprog/maps/features/Area {
+	public abstract fun contains (Ljava/lang/Object;)Z
+}
+
+public final class center/sciprog/maps/features/BitmapIconFeature : center/sciprog/maps/features/MarkerFeature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;JLandroidx/compose/ui/graphics/ImageBitmap;Ljava/util/Map;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;JLandroidx/compose/ui/graphics/ImageBitmap;Ljava/util/Map;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Ljava/lang/Object;
+	public final fun component3-MYxV2XQ ()J
+	public final fun component4 ()Landroidx/compose/ui/graphics/ImageBitmap;
+	public final fun component5-hlWAoAs ()Ljava/util/Map;
+	public final fun copy-xcw5jm0 (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;JLandroidx/compose/ui/graphics/ImageBitmap;Ljava/util/Map;)Lcenter/sciprog/maps/features/BitmapIconFeature;
+	public static synthetic fun copy-xcw5jm0$default (Lcenter/sciprog/maps/features/BitmapIconFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;JLandroidx/compose/ui/graphics/ImageBitmap;Ljava/util/Map;ILjava/lang/Object;)Lcenter/sciprog/maps/features/BitmapIconFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public fun getCenter ()Ljava/lang/Object;
+	public final fun getImage ()Landroidx/compose/ui/graphics/ImageBitmap;
+	public final fun getSize-MYxV2XQ ()J
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+	public fun withCoordinates (Ljava/lang/Object;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public final class center/sciprog/maps/features/CircleFeature : center/sciprog/maps/features/MarkerFeature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;FLjava/util/Map;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;FLjava/util/Map;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Ljava/lang/Object;
+	public final fun component3-D9Ej5fM ()F
+	public final fun component4-hlWAoAs ()Ljava/util/Map;
+	public fun contains (Lcenter/sciprog/maps/features/ViewPoint;)Z
+	public final fun copy-eji0nfc (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;FLjava/util/Map;)Lcenter/sciprog/maps/features/CircleFeature;
+	public static synthetic fun copy-eji0nfc$default (Lcenter/sciprog/maps/features/CircleFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;FLjava/util/Map;ILjava/lang/Object;)Lcenter/sciprog/maps/features/CircleFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public fun getCenter ()Ljava/lang/Object;
+	public final fun getRadius-D9Ej5fM ()F
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+	public fun withCoordinates (Ljava/lang/Object;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public final class center/sciprog/maps/features/ClickListenerAttribute : center/sciprog/attributes/SetAttribute {
+	public static final field $stable I
+	public static final field INSTANCE Lcenter/sciprog/maps/features/ClickListenerAttribute;
+}
+
+public final class center/sciprog/maps/features/ClickRadius : center/sciprog/attributes/Attribute {
+	public static final field $stable I
+	public static final field INSTANCE Lcenter/sciprog/maps/features/ClickRadius;
+}
+
+public final class center/sciprog/maps/features/ColorAttribute : center/sciprog/attributes/Attribute {
+	public static final field $stable I
+	public static final field INSTANCE Lcenter/sciprog/maps/features/ColorAttribute;
+}
+
+public final class center/sciprog/maps/features/CompositeFeaturesKt {
+	public static final fun draggableLine (Lcenter/sciprog/maps/features/FeatureGroup;Lcenter/sciprog/maps/features/FeatureRef;Lcenter/sciprog/maps/features/FeatureRef;Ljava/lang/String;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun draggableLine$default (Lcenter/sciprog/maps/features/FeatureGroup;Lcenter/sciprog/maps/features/FeatureRef;Lcenter/sciprog/maps/features/FeatureRef;Ljava/lang/String;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun draggableMultiLine (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/util/List;Ljava/lang/String;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun draggableMultiLine$default (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/util/List;Ljava/lang/String;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun draggableMultiLineFromPoints (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/util/List;Ljava/lang/String;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun draggableMultiLineFromPoints$default (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/util/List;Ljava/lang/String;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+}
+
+public abstract interface class center/sciprog/maps/features/CoordinateSpace {
+	public abstract fun Rectangle (Ljava/lang/Object;Ljava/lang/Object;)Lcenter/sciprog/maps/features/Rectangle;
+	public abstract fun Rectangle-Iw8sGQE (Ljava/lang/Object;FJ)Lcenter/sciprog/maps/features/Rectangle;
+	public abstract fun ViewPoint (Ljava/lang/Object;F)Lcenter/sciprog/maps/features/ViewPoint;
+	public fun distanceTo-ccRj1GA (Ljava/lang/Object;Ljava/lang/Object;F)F
+	public fun distanceToLine-DwT6o7Y (Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;F)F
+	public abstract fun getDefaultViewPoint ()Lcenter/sciprog/maps/features/ViewPoint;
+	public abstract fun isInsidePolygon (Ljava/lang/Object;Ljava/util/List;)Z
+	public abstract fun moveBy (Lcenter/sciprog/maps/features/ViewPoint;Ljava/lang/Object;)Lcenter/sciprog/maps/features/ViewPoint;
+	public abstract fun offsetTo-LQHvzoY (Ljava/lang/Object;Ljava/lang/Object;F)J
+	public abstract fun withCenter (Lcenter/sciprog/maps/features/Rectangle;Ljava/lang/Object;)Lcenter/sciprog/maps/features/Rectangle;
+	public abstract fun wrapPoints (Ljava/util/Collection;)Lcenter/sciprog/maps/features/Rectangle;
+	public abstract fun wrapRectangles (Ljava/util/Collection;)Lcenter/sciprog/maps/features/Rectangle;
+	public abstract fun zoomBy (Lcenter/sciprog/maps/features/ViewPoint;FLjava/lang/Object;)Lcenter/sciprog/maps/features/ViewPoint;
+	public static synthetic fun zoomBy$default (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/ViewPoint;FLjava/lang/Object;ILjava/lang/Object;)Lcenter/sciprog/maps/features/ViewPoint;
+}
+
+public final class center/sciprog/maps/features/CoordinateSpaceKt {
+	public static final fun Rectangle-Iw8sGQE (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/ViewPoint;J)Lcenter/sciprog/maps/features/Rectangle;
+}
+
+public abstract class center/sciprog/maps/features/CoordinateViewScope {
+	public static final field $stable I
+	public fun <init> (Lcenter/sciprog/maps/features/ViewConfig;)V
+	public abstract fun computeViewPoint (Lcenter/sciprog/maps/features/Rectangle;)Lcenter/sciprog/maps/features/ViewPoint;
+	public final fun getCanvasSize-MYxV2XQ ()J
+	public final fun getConfig ()Lcenter/sciprog/maps/features/ViewConfig;
+	public final fun getSelectRect ()Landroidx/compose/ui/unit/DpRect;
+	public abstract fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun getViewPoint ()Lcenter/sciprog/maps/features/ViewPoint;
+	public final fun getZoom ()F
+	public abstract fun moveBy-VpY3zN4 (Lcenter/sciprog/maps/features/ViewPoint;FF)Lcenter/sciprog/maps/features/ViewPoint;
+	public final fun setCanvasSize-EaSLcWc (J)V
+	public final fun setSelectRect (Landroidx/compose/ui/unit/DpRect;)V
+	public final fun setViewPoint (Lcenter/sciprog/maps/features/ViewPoint;)V
+	public final fun toCoordinates-3MmeM6k (JLandroidx/compose/ui/unit/Density;)Ljava/lang/Object;
+	public abstract fun toCoordinates-jo-Fl9I (J)Ljava/lang/Object;
+	public abstract fun toDpOffset-gVRvYmI (Ljava/lang/Object;)J
+	public abstract fun toDpRect (Lcenter/sciprog/maps/features/Rectangle;)Landroidx/compose/ui/unit/DpRect;
+	public final fun toOffset-dBAh8RU (Ljava/lang/Object;Landroidx/compose/ui/unit/Density;)J
+}
+
+public final class center/sciprog/maps/features/CoordinateViewScopeKt {
+	public static final fun getBottomRight (Landroidx/compose/ui/unit/DpRect;)J
+	public static final fun getTopLeft (Landroidx/compose/ui/unit/DpRect;)J
+}
+
+public abstract interface class center/sciprog/maps/features/DomainFeature : center/sciprog/maps/features/Feature {
+	public fun contains (Lcenter/sciprog/maps/features/ViewPoint;)Z
+}
+
+public abstract interface class center/sciprog/maps/features/DragHandle {
+	public static final field Companion Lcenter/sciprog/maps/features/DragHandle$Companion;
+	public abstract fun handle (Landroidx/compose/ui/input/pointer/PointerEvent;Lcenter/sciprog/maps/features/ViewPoint;Lcenter/sciprog/maps/features/ViewPoint;)Lcenter/sciprog/maps/features/DragResult;
+}
+
+public final class center/sciprog/maps/features/DragHandle$Companion {
+	public final fun bypass ()Lcenter/sciprog/maps/features/DragHandle;
+	public final fun combine ([Lcenter/sciprog/maps/features/DragHandle;)Lcenter/sciprog/maps/features/DragHandle;
+	public final fun withPrimaryButton (Lkotlin/jvm/functions/Function3;)Lcenter/sciprog/maps/features/DragHandle;
+}
+
+public abstract interface class center/sciprog/maps/features/DragListener {
+	public abstract fun handle (Landroidx/compose/ui/input/pointer/PointerEvent;Lcenter/sciprog/maps/features/ViewPoint;Lcenter/sciprog/maps/features/ViewPoint;)V
+}
+
+public final class center/sciprog/maps/features/DragListenerAttribute : center/sciprog/attributes/SetAttribute {
+	public static final field $stable I
+	public static final field INSTANCE Lcenter/sciprog/maps/features/DragListenerAttribute;
+}
+
+public final class center/sciprog/maps/features/DragResult {
+	public static final field $stable I
+	public fun <init> (Lcenter/sciprog/maps/features/ViewPoint;Z)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/ViewPoint;ZILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/ViewPoint;
+	public final fun component2 ()Z
+	public final fun copy (Lcenter/sciprog/maps/features/ViewPoint;Z)Lcenter/sciprog/maps/features/DragResult;
+	public static synthetic fun copy$default (Lcenter/sciprog/maps/features/DragResult;Lcenter/sciprog/maps/features/ViewPoint;ZILjava/lang/Object;)Lcenter/sciprog/maps/features/DragResult;
+	public fun equals (Ljava/lang/Object;)Z
+	public final fun getHandleNext ()Z
+	public final fun getResult ()Lcenter/sciprog/maps/features/ViewPoint;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+}
+
+public final class center/sciprog/maps/features/DraggableAttribute : center/sciprog/attributes/Attribute {
+	public static final field $stable I
+	public static final field INSTANCE Lcenter/sciprog/maps/features/DraggableAttribute;
+}
+
+public abstract interface class center/sciprog/maps/features/DraggableFeature : center/sciprog/maps/features/DomainFeature {
+	public abstract fun withCoordinates (Ljava/lang/Object;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public final class center/sciprog/maps/features/DrawFeature : center/sciprog/maps/features/DraggableFeature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;Ljava/util/Map;Lkotlin/jvm/functions/Function1;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;Ljava/util/Map;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Ljava/lang/Object;
+	public final fun component3-hlWAoAs ()Ljava/util/Map;
+	public final fun component4 ()Lkotlin/jvm/functions/Function1;
+	public final fun copy-4xdkkFs (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;Ljava/util/Map;Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/DrawFeature;
+	public static synthetic fun copy-4xdkkFs$default (Lcenter/sciprog/maps/features/DrawFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;Ljava/util/Map;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lcenter/sciprog/maps/features/DrawFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public final fun getDrawFeature ()Lkotlin/jvm/functions/Function1;
+	public final fun getPosition ()Ljava/lang/Object;
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+	public fun withCoordinates (Ljava/lang/Object;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public final class center/sciprog/maps/features/DrawFeatureKt {
+	public static final fun drawFeature (Landroidx/compose/ui/graphics/drawscope/DrawScope;Lcenter/sciprog/maps/features/CoordinateViewScope;Ljava/util/Map;Lcenter/sciprog/maps/features/Feature;)V
+}
+
+public abstract interface class center/sciprog/maps/features/Feature {
+	public abstract fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public abstract fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public static synthetic fun getBoundingBox$default (Lcenter/sciprog/maps/features/Feature;FILjava/lang/Object;)Lcenter/sciprog/maps/features/Rectangle;
+	public abstract fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public abstract fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public final class center/sciprog/maps/features/FeatureGroup : center/sciprog/maps/features/CoordinateSpace, center/sciprog/maps/features/Feature {
+	public static final field $stable I
+	public static final field Companion Lcenter/sciprog/maps/features/FeatureGroup$Companion;
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Landroidx/compose/runtime/snapshots/SnapshotStateMap;Ljava/util/Map;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Landroidx/compose/runtime/snapshots/SnapshotStateMap;Ljava/util/Map;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public fun Rectangle (Ljava/lang/Object;Ljava/lang/Object;)Lcenter/sciprog/maps/features/Rectangle;
+	public fun Rectangle-Iw8sGQE (Ljava/lang/Object;FJ)Lcenter/sciprog/maps/features/Rectangle;
+	public fun ViewPoint (Ljava/lang/Object;F)Lcenter/sciprog/maps/features/ViewPoint;
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Landroidx/compose/runtime/snapshots/SnapshotStateMap;
+	public final fun component3-hlWAoAs ()Ljava/util/Map;
+	public final fun copy-EHyjM0Q (Lcenter/sciprog/maps/features/CoordinateSpace;Landroidx/compose/runtime/snapshots/SnapshotStateMap;Ljava/util/Map;)Lcenter/sciprog/maps/features/FeatureGroup;
+	public static synthetic fun copy-EHyjM0Q$default (Lcenter/sciprog/maps/features/FeatureGroup;Lcenter/sciprog/maps/features/CoordinateSpace;Landroidx/compose/runtime/snapshots/SnapshotStateMap;Ljava/util/Map;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureGroup;
+	public fun distanceTo-ccRj1GA (Ljava/lang/Object;Ljava/lang/Object;F)F
+	public fun distanceToLine-DwT6o7Y (Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;F)F
+	public fun equals (Ljava/lang/Object;)Z
+	public final fun feature (Ljava/lang/String;Lcenter/sciprog/maps/features/Feature;)Lcenter/sciprog/maps/features/FeatureRef;
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public fun getDefaultViewPoint ()Lcenter/sciprog/maps/features/ViewPoint;
+	public final fun getFeatureMap ()Landroidx/compose/runtime/snapshots/SnapshotStateMap;
+	public final fun getFeatures ()Ljava/util/Collection;
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public fun hashCode ()I
+	public fun isInsidePolygon (Ljava/lang/Object;Ljava/util/List;)Z
+	public fun moveBy (Lcenter/sciprog/maps/features/ViewPoint;Ljava/lang/Object;)Lcenter/sciprog/maps/features/ViewPoint;
+	public fun offsetTo-LQHvzoY (Ljava/lang/Object;Ljava/lang/Object;F)J
+	public final fun removeFeature (Ljava/lang/String;)V
+	public fun toString ()Ljava/lang/String;
+	public final fun visit (Lkotlin/jvm/functions/Function3;)V
+	public final fun visitUntil (Lkotlin/jvm/functions/Function3;)V
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+	public fun withCenter (Lcenter/sciprog/maps/features/Rectangle;Ljava/lang/Object;)Lcenter/sciprog/maps/features/Rectangle;
+	public fun wrapPoints (Ljava/util/Collection;)Lcenter/sciprog/maps/features/Rectangle;
+	public fun wrapRectangles (Ljava/util/Collection;)Lcenter/sciprog/maps/features/Rectangle;
+	public fun zoomBy (Lcenter/sciprog/maps/features/ViewPoint;FLjava/lang/Object;)Lcenter/sciprog/maps/features/ViewPoint;
+}
+
+public final class center/sciprog/maps/features/FeatureGroup$Companion {
+	public final fun build (Lcenter/sciprog/maps/features/CoordinateSpace;Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/FeatureGroup;
+	public static synthetic fun build$default (Lcenter/sciprog/maps/features/FeatureGroup$Companion;Lcenter/sciprog/maps/features/CoordinateSpace;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureGroup;
+	public final fun remember (Lcenter/sciprog/maps/features/CoordinateSpace;Lkotlin/jvm/functions/Function1;Landroidx/compose/runtime/Composer;II)Lcenter/sciprog/maps/features/FeatureGroup;
+}
+
+public final class center/sciprog/maps/features/FeatureGroupKt {
+	public static final fun Structure2D (IILkotlin/jvm/functions/Function1;)Lspace/kscience/kmath/nd/Structure2D;
+	public static final fun StructureND-qL90JFI ([ILkotlin/jvm/functions/Function1;)Lspace/kscience/kmath/nd/StructureND;
+	public static final fun arc-f9v9FWM (Lcenter/sciprog/maps/features/FeatureGroup;Lcenter/sciprog/maps/features/Rectangle;Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Ljava/util/Map;Ljava/lang/String;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun arc-f9v9FWM$default (Lcenter/sciprog/maps/features/FeatureGroup;Lcenter/sciprog/maps/features/Rectangle;Lspace/kscience/kmath/geometry/Angle;Lspace/kscience/kmath/geometry/Angle;Ljava/util/Map;Ljava/lang/String;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun circle-vJIlCZg (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/lang/Object;FLjava/util/Map;Ljava/lang/String;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun circle-vJIlCZg$default (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/lang/Object;FLjava/util/Map;Ljava/lang/String;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun draw-UqNt6FI (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/lang/Object;Ljava/util/Map;Ljava/lang/String;Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun draw-UqNt6FI$default (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/lang/Object;Ljava/util/Map;Ljava/lang/String;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun forEachWithAttribute (Lcenter/sciprog/maps/features/FeatureGroup;Lcenter/sciprog/attributes/Attribute;Lkotlin/jvm/functions/Function4;)V
+	public static final fun forEachWithAttributeUntil (Lcenter/sciprog/maps/features/FeatureGroup;Lcenter/sciprog/attributes/Attribute;Lkotlin/jvm/functions/Function4;)V
+	public static final fun getAttributes (Lcenter/sciprog/maps/features/FeatureRef;)Ljava/util/Map;
+	public static final fun group-WhaQnWU (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/util/Map;Ljava/lang/String;Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun group-WhaQnWU$default (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/util/Map;Ljava/lang/String;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun icon-Rwk-ljY (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/lang/Object;Landroidx/compose/ui/graphics/vector/ImageVector;JLjava/util/Map;Ljava/lang/String;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun icon-Rwk-ljY$default (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/lang/Object;Landroidx/compose/ui/graphics/vector/ImageVector;JLjava/util/Map;Ljava/lang/String;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun line-JCOR_Dk (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/lang/Object;Ljava/lang/Object;Ljava/util/Map;Ljava/lang/String;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun line-JCOR_Dk$default (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/lang/Object;Ljava/lang/Object;Ljava/util/Map;Ljava/lang/String;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun multiLine-4xdkkFs (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/util/List;Ljava/util/Map;Ljava/lang/String;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun multiLine-4xdkkFs$default (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/util/List;Ljava/util/Map;Ljava/lang/String;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun pixelMap-JCOR_Dk (Lcenter/sciprog/maps/features/FeatureGroup;Lcenter/sciprog/maps/features/Rectangle;Lspace/kscience/kmath/nd/Structure2D;Ljava/util/Map;Ljava/lang/String;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun pixelMap-JCOR_Dk$default (Lcenter/sciprog/maps/features/FeatureGroup;Lcenter/sciprog/maps/features/Rectangle;Lspace/kscience/kmath/nd/Structure2D;Ljava/util/Map;Ljava/lang/String;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun points-4xdkkFs (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/util/List;Ljava/util/Map;Ljava/lang/String;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun points-4xdkkFs$default (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/util/List;Ljava/util/Map;Ljava/lang/String;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun polygon-4xdkkFs (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/util/List;Ljava/util/Map;Ljava/lang/String;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun polygon-4xdkkFs$default (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/util/List;Ljava/util/Map;Ljava/lang/String;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun rectangle-H_bhbsI (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/lang/Object;JLjava/util/Map;Ljava/lang/String;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun rectangle-H_bhbsI$default (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/lang/Object;JLjava/util/Map;Ljava/lang/String;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun resolve (Lcenter/sciprog/maps/features/FeatureRef;)Lcenter/sciprog/maps/features/Feature;
+	public static final fun scalableImage-UqNt6FI (Lcenter/sciprog/maps/features/FeatureGroup;Lcenter/sciprog/maps/features/Rectangle;Ljava/util/Map;Ljava/lang/String;Lkotlin/jvm/functions/Function2;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun scalableImage-UqNt6FI$default (Lcenter/sciprog/maps/features/FeatureGroup;Lcenter/sciprog/maps/features/Rectangle;Ljava/util/Map;Ljava/lang/String;Lkotlin/jvm/functions/Function2;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun text-f9v9FWM (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/lang/Object;Ljava/lang/String;Lkotlin/jvm/functions/Function1;Ljava/util/Map;Ljava/lang/String;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun text-f9v9FWM$default (Lcenter/sciprog/maps/features/FeatureGroup;Ljava/lang/Object;Ljava/lang/String;Lkotlin/jvm/functions/Function1;Ljava/util/Map;Ljava/lang/String;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+}
+
+public final class center/sciprog/maps/features/FeatureKt {
+	public static final fun computeBoundingBox (Ljava/lang/Iterable;Lcenter/sciprog/maps/features/CoordinateSpace;F)Lcenter/sciprog/maps/features/Rectangle;
+	public static final fun getColor (Lcenter/sciprog/maps/features/Feature;)Landroidx/compose/ui/graphics/Color;
+	public static final fun getName (Lcenter/sciprog/maps/features/Feature;)Ljava/lang/String;
+	public static final fun getZoomRange (Lcenter/sciprog/maps/features/Feature;)Lkotlin/ranges/ClosedFloatingPointRange;
+}
+
+public final class center/sciprog/maps/features/FeatureRef {
+	public static final field $stable I
+	public fun <init> (Ljava/lang/String;Lcenter/sciprog/maps/features/FeatureGroup;)V
+	public final fun getId ()Ljava/lang/String;
+	public final fun getParent ()Lcenter/sciprog/maps/features/FeatureGroup;
+}
+
+public final class center/sciprog/maps/features/FeatureSelector : center/sciprog/maps/features/Feature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/Map;Lkotlin/jvm/functions/Function1;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/Map;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2-hlWAoAs ()Ljava/util/Map;
+	public final fun component3 ()Lkotlin/jvm/functions/Function1;
+	public final fun copy-I8jStn0 (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/Map;Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/FeatureSelector;
+	public static synthetic fun copy-I8jStn0$default (Lcenter/sciprog/maps/features/FeatureSelector;Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/Map;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureSelector;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public final fun getSelector ()Lkotlin/jvm/functions/Function1;
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public final class center/sciprog/maps/features/HoverListenerAttribute : center/sciprog/attributes/SetAttribute {
+	public static final field $stable I
+	public static final field INSTANCE Lcenter/sciprog/maps/features/HoverListenerAttribute;
+}
+
+public final class center/sciprog/maps/features/LineFeature : center/sciprog/maps/features/DomainFeature, center/sciprog/maps/features/LineSegmentFeature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;Ljava/lang/Object;Ljava/util/Map;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;Ljava/lang/Object;Ljava/util/Map;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Ljava/lang/Object;
+	public final fun component3 ()Ljava/lang/Object;
+	public final fun component4-hlWAoAs ()Ljava/util/Map;
+	public fun contains (Lcenter/sciprog/maps/features/ViewPoint;)Z
+	public final fun copy-a7qfu0U (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;Ljava/lang/Object;Ljava/util/Map;)Lcenter/sciprog/maps/features/LineFeature;
+	public static synthetic fun copy-a7qfu0U$default (Lcenter/sciprog/maps/features/LineFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;Ljava/lang/Object;Ljava/util/Map;ILjava/lang/Object;)Lcenter/sciprog/maps/features/LineFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public final fun getA ()Ljava/lang/Object;
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public final fun getB ()Ljava/lang/Object;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public final fun getCenter ()Ljava/lang/Object;
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public abstract interface class center/sciprog/maps/features/LineSegmentFeature : center/sciprog/maps/features/Feature {
+}
+
+public final class center/sciprog/maps/features/MapFeatureAttributesKt {
+	public static final fun color-4WTKRHQ (Lcenter/sciprog/maps/features/FeatureRef;J)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun draggable (Lcenter/sciprog/maps/features/FeatureRef;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function3;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun draggable$default (Lcenter/sciprog/maps/features/FeatureRef;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function3;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun modifyAttribute (Lcenter/sciprog/maps/features/FeatureRef;Lcenter/sciprog/attributes/Attribute;Ljava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun modifyAttributes (Lcenter/sciprog/maps/features/FeatureRef;Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun onClick (Lcenter/sciprog/maps/features/FeatureRef;Landroidx/compose/foundation/PointerMatcher;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function2;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun onClick (Lcenter/sciprog/maps/features/FeatureRef;Lkotlin/jvm/functions/Function2;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static synthetic fun onClick$default (Lcenter/sciprog/maps/features/FeatureRef;Landroidx/compose/foundation/PointerMatcher;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function2;ILjava/lang/Object;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun onDrag (Lcenter/sciprog/maps/features/FeatureRef;Lkotlin/jvm/functions/Function3;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun onHover (Lcenter/sciprog/maps/features/FeatureRef;Lkotlin/jvm/functions/Function2;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun pathEffect (Lcenter/sciprog/maps/features/FeatureRef;Landroidx/compose/ui/graphics/PathEffect;)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun stroke (Lcenter/sciprog/maps/features/FeatureRef;F)Lcenter/sciprog/maps/features/FeatureRef;
+	public static final fun zoomRange (Lcenter/sciprog/maps/features/FeatureRef;Lkotlin/ranges/ClosedFloatingPointRange;)Lcenter/sciprog/maps/features/FeatureRef;
+}
+
+public abstract interface class center/sciprog/maps/features/MarkerFeature : center/sciprog/maps/features/DraggableFeature {
+	public abstract fun getCenter ()Ljava/lang/Object;
+}
+
+public abstract interface class center/sciprog/maps/features/MouseListener {
+	public static final field Companion Lcenter/sciprog/maps/features/MouseListener$Companion;
+	public abstract fun handle (Landroidx/compose/ui/input/pointer/PointerEvent;Lcenter/sciprog/maps/features/ViewPoint;)V
+}
+
+public final class center/sciprog/maps/features/MouseListener$Companion {
+	public final fun withPrimaryButton (Lkotlin/jvm/functions/Function2;)Lcenter/sciprog/maps/features/MouseListener;
+}
+
+public final class center/sciprog/maps/features/MultiLineFeature : center/sciprog/maps/features/DomainFeature, center/sciprog/maps/features/LineSegmentFeature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/List;Ljava/util/Map;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/List;Ljava/util/Map;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Ljava/util/List;
+	public final fun component3-hlWAoAs ()Ljava/util/Map;
+	public fun contains (Lcenter/sciprog/maps/features/ViewPoint;)Z
+	public final fun copy-EHyjM0Q (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/List;Ljava/util/Map;)Lcenter/sciprog/maps/features/MultiLineFeature;
+	public static synthetic fun copy-EHyjM0Q$default (Lcenter/sciprog/maps/features/MultiLineFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/List;Ljava/util/Map;ILjava/lang/Object;)Lcenter/sciprog/maps/features/MultiLineFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public final fun getPoints ()Ljava/util/List;
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public abstract interface class center/sciprog/maps/features/PainterFeature : center/sciprog/maps/features/Feature {
+	public abstract fun getPainter (Landroidx/compose/runtime/Composer;I)Landroidx/compose/ui/graphics/painter/Painter;
+}
+
+public final class center/sciprog/maps/features/PathEffectAttribute : center/sciprog/attributes/Attribute {
+	public static final field $stable I
+	public static final field INSTANCE Lcenter/sciprog/maps/features/PathEffectAttribute;
+}
+
+public final class center/sciprog/maps/features/PathFeature : center/sciprog/maps/features/DraggableFeature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Landroidx/compose/ui/graphics/Path;Landroidx/compose/ui/graphics/Brush;Landroidx/compose/ui/graphics/drawscope/DrawStyle;Landroidx/compose/ui/geometry/Rect;Ljava/util/Map;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Landroidx/compose/ui/graphics/Path;Landroidx/compose/ui/graphics/Brush;Landroidx/compose/ui/graphics/drawscope/DrawStyle;Landroidx/compose/ui/geometry/Rect;Ljava/util/Map;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Lcenter/sciprog/maps/features/Rectangle;
+	public final fun component3 ()Landroidx/compose/ui/graphics/Path;
+	public final fun component4 ()Landroidx/compose/ui/graphics/Brush;
+	public final fun component5 ()Landroidx/compose/ui/graphics/drawscope/DrawStyle;
+	public final fun component6 ()Landroidx/compose/ui/geometry/Rect;
+	public final fun component7-hlWAoAs ()Ljava/util/Map;
+	public final fun copy-mDmFKLY (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Landroidx/compose/ui/graphics/Path;Landroidx/compose/ui/graphics/Brush;Landroidx/compose/ui/graphics/drawscope/DrawStyle;Landroidx/compose/ui/geometry/Rect;Ljava/util/Map;)Lcenter/sciprog/maps/features/PathFeature;
+	public static synthetic fun copy-mDmFKLY$default (Lcenter/sciprog/maps/features/PathFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Landroidx/compose/ui/graphics/Path;Landroidx/compose/ui/graphics/Brush;Landroidx/compose/ui/graphics/drawscope/DrawStyle;Landroidx/compose/ui/geometry/Rect;Ljava/util/Map;ILjava/lang/Object;)Lcenter/sciprog/maps/features/PathFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public final fun getBrush ()Landroidx/compose/ui/graphics/Brush;
+	public final fun getPath ()Landroidx/compose/ui/graphics/Path;
+	public final fun getRectangle ()Lcenter/sciprog/maps/features/Rectangle;
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun getStyle ()Landroidx/compose/ui/graphics/drawscope/DrawStyle;
+	public final fun getTargetRect ()Landroidx/compose/ui/geometry/Rect;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+	public fun withCoordinates (Ljava/lang/Object;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public final class center/sciprog/maps/features/PixelMapFeature : center/sciprog/maps/features/Feature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Lspace/kscience/kmath/nd/Structure2D;Ljava/util/Map;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Lspace/kscience/kmath/nd/Structure2D;Ljava/util/Map;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Lcenter/sciprog/maps/features/Rectangle;
+	public final fun component3 ()Lspace/kscience/kmath/nd/Structure2D;
+	public final fun component4-hlWAoAs ()Ljava/util/Map;
+	public final fun copy-a7qfu0U (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Lspace/kscience/kmath/nd/Structure2D;Ljava/util/Map;)Lcenter/sciprog/maps/features/PixelMapFeature;
+	public static synthetic fun copy-a7qfu0U$default (Lcenter/sciprog/maps/features/PixelMapFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Lspace/kscience/kmath/nd/Structure2D;Ljava/util/Map;ILjava/lang/Object;)Lcenter/sciprog/maps/features/PixelMapFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public final fun getPixelMap ()Lspace/kscience/kmath/nd/Structure2D;
+	public final fun getRectangle ()Lcenter/sciprog/maps/features/Rectangle;
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public final class center/sciprog/maps/features/PointsFeature : center/sciprog/maps/features/Feature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/List;Ljava/util/Map;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/List;Ljava/util/Map;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Ljava/util/List;
+	public final fun component3-hlWAoAs ()Ljava/util/Map;
+	public final fun copy-EHyjM0Q (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/List;Ljava/util/Map;)Lcenter/sciprog/maps/features/PointsFeature;
+	public static synthetic fun copy-EHyjM0Q$default (Lcenter/sciprog/maps/features/PointsFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/List;Ljava/util/Map;ILjava/lang/Object;)Lcenter/sciprog/maps/features/PointsFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public final fun getPoints ()Ljava/util/List;
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public final class center/sciprog/maps/features/PolygonFeature : center/sciprog/maps/features/DomainFeature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/List;Ljava/util/Map;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/List;Ljava/util/Map;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Ljava/util/List;
+	public final fun component3-hlWAoAs ()Ljava/util/Map;
+	public fun contains (Lcenter/sciprog/maps/features/ViewPoint;)Z
+	public final fun copy-EHyjM0Q (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/List;Ljava/util/Map;)Lcenter/sciprog/maps/features/PolygonFeature;
+	public static synthetic fun copy-EHyjM0Q$default (Lcenter/sciprog/maps/features/PolygonFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/util/List;Ljava/util/Map;ILjava/lang/Object;)Lcenter/sciprog/maps/features/PolygonFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public final fun getPoints ()Ljava/util/List;
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public abstract interface class center/sciprog/maps/features/Rectangle : center/sciprog/maps/features/Area {
+	public abstract fun getA ()Ljava/lang/Object;
+	public abstract fun getB ()Ljava/lang/Object;
+	public abstract fun getCenter ()Ljava/lang/Object;
+}
+
+public final class center/sciprog/maps/features/RectangleFeature : center/sciprog/maps/features/MarkerFeature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;JLjava/util/Map;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;JLjava/util/Map;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Ljava/lang/Object;
+	public final fun component3-MYxV2XQ ()J
+	public final fun component4-hlWAoAs ()Ljava/util/Map;
+	public final fun copy-tzWo0Eo (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;JLjava/util/Map;)Lcenter/sciprog/maps/features/RectangleFeature;
+	public static synthetic fun copy-tzWo0Eo$default (Lcenter/sciprog/maps/features/RectangleFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;JLjava/util/Map;ILjava/lang/Object;)Lcenter/sciprog/maps/features/RectangleFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public fun getCenter ()Ljava/lang/Object;
+	public final fun getSize-MYxV2XQ ()J
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+	public fun withCoordinates (Ljava/lang/Object;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public final class center/sciprog/maps/features/ScalableImageFeature : center/sciprog/maps/features/Feature, center/sciprog/maps/features/PainterFeature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Ljava/util/Map;Lkotlin/jvm/functions/Function2;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Ljava/util/Map;Lkotlin/jvm/functions/Function2;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Lcenter/sciprog/maps/features/Rectangle;
+	public final fun component3-hlWAoAs ()Ljava/util/Map;
+	public final fun component4 ()Lkotlin/jvm/functions/Function2;
+	public final fun copy-4xdkkFs (Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Ljava/util/Map;Lkotlin/jvm/functions/Function2;)Lcenter/sciprog/maps/features/ScalableImageFeature;
+	public static synthetic fun copy-4xdkkFs$default (Lcenter/sciprog/maps/features/ScalableImageFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Lcenter/sciprog/maps/features/Rectangle;Ljava/util/Map;Lkotlin/jvm/functions/Function2;ILjava/lang/Object;)Lcenter/sciprog/maps/features/ScalableImageFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public final fun getPainter ()Lkotlin/jvm/functions/Function2;
+	public fun getPainter (Landroidx/compose/runtime/Composer;I)Landroidx/compose/ui/graphics/painter/Painter;
+	public final fun getRectangle ()Lcenter/sciprog/maps/features/Rectangle;
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public final class center/sciprog/maps/features/StrokeAttribute : center/sciprog/attributes/Attribute {
+	public static final field $stable I
+	public static final field INSTANCE Lcenter/sciprog/maps/features/StrokeAttribute;
+}
+
+public final class center/sciprog/maps/features/TextFeature : center/sciprog/maps/features/DraggableFeature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;Ljava/lang/String;Ljava/util/Map;Lkotlin/jvm/functions/Function1;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;Ljava/lang/String;Ljava/util/Map;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Ljava/lang/Object;
+	public final fun component3 ()Ljava/lang/String;
+	public final fun component4-hlWAoAs ()Ljava/util/Map;
+	public final fun component5 ()Lkotlin/jvm/functions/Function1;
+	public final fun copy-JCOR_Dk (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;Ljava/lang/String;Ljava/util/Map;Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/TextFeature;
+	public static synthetic fun copy-JCOR_Dk$default (Lcenter/sciprog/maps/features/TextFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;Ljava/lang/String;Ljava/util/Map;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lcenter/sciprog/maps/features/TextFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public final fun getFontConfig ()Lkotlin/jvm/functions/Function1;
+	public final fun getPosition ()Ljava/lang/Object;
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun getText ()Ljava/lang/String;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+	public fun withCoordinates (Ljava/lang/Object;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public final class center/sciprog/maps/features/VectorIconFeature : center/sciprog/maps/features/MarkerFeature, center/sciprog/maps/features/PainterFeature {
+	public static final field $stable I
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;JLandroidx/compose/ui/graphics/vector/ImageVector;Ljava/util/Map;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;JLandroidx/compose/ui/graphics/vector/ImageVector;Ljava/util/Map;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public final fun component2 ()Ljava/lang/Object;
+	public final fun component3-MYxV2XQ ()J
+	public final fun component4 ()Landroidx/compose/ui/graphics/vector/ImageVector;
+	public final fun component5-hlWAoAs ()Ljava/util/Map;
+	public final fun copy-xcw5jm0 (Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;JLandroidx/compose/ui/graphics/vector/ImageVector;Ljava/util/Map;)Lcenter/sciprog/maps/features/VectorIconFeature;
+	public static synthetic fun copy-xcw5jm0$default (Lcenter/sciprog/maps/features/VectorIconFeature;Lcenter/sciprog/maps/features/CoordinateSpace;Ljava/lang/Object;JLandroidx/compose/ui/graphics/vector/ImageVector;Ljava/util/Map;ILjava/lang/Object;)Lcenter/sciprog/maps/features/VectorIconFeature;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getAttributes-hlWAoAs ()Ljava/util/Map;
+	public fun getBoundingBox (F)Lcenter/sciprog/maps/features/Rectangle;
+	public fun getCenter ()Ljava/lang/Object;
+	public final fun getImage ()Landroidx/compose/ui/graphics/vector/ImageVector;
+	public synthetic fun getPainter (Landroidx/compose/runtime/Composer;I)Landroidx/compose/ui/graphics/painter/Painter;
+	public fun getPainter (Landroidx/compose/runtime/Composer;I)Landroidx/compose/ui/graphics/vector/VectorPainter;
+	public final fun getSize-MYxV2XQ ()J
+	public fun getSpace ()Lcenter/sciprog/maps/features/CoordinateSpace;
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+	public fun withAttributes (Lkotlin/jvm/functions/Function1;)Lcenter/sciprog/maps/features/Feature;
+	public fun withCoordinates (Ljava/lang/Object;)Lcenter/sciprog/maps/features/Feature;
+}
+
+public final class center/sciprog/maps/features/ViewConfig {
+	public static final field $stable I
+	public fun <init> ()V
+	public fun <init> (FLcenter/sciprog/maps/features/MouseListener;Lcenter/sciprog/maps/features/DragHandle;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;ZZ)V
+	public synthetic fun <init> (FLcenter/sciprog/maps/features/MouseListener;Lcenter/sciprog/maps/features/DragHandle;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;ZZILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public final fun component1 ()F
+	public final fun component2 ()Lcenter/sciprog/maps/features/MouseListener;
+	public final fun component3 ()Lcenter/sciprog/maps/features/DragHandle;
+	public final fun component4 ()Lkotlin/jvm/functions/Function1;
+	public final fun component5 ()Lkotlin/jvm/functions/Function1;
+	public final fun component6 ()Lkotlin/jvm/functions/Function1;
+	public final fun component7 ()Z
+	public final fun component8 ()Z
+	public final fun copy (FLcenter/sciprog/maps/features/MouseListener;Lcenter/sciprog/maps/features/DragHandle;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;ZZ)Lcenter/sciprog/maps/features/ViewConfig;
+	public static synthetic fun copy$default (Lcenter/sciprog/maps/features/ViewConfig;FLcenter/sciprog/maps/features/MouseListener;Lcenter/sciprog/maps/features/DragHandle;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;ZZILjava/lang/Object;)Lcenter/sciprog/maps/features/ViewConfig;
+	public fun equals (Ljava/lang/Object;)Z
+	public final fun getDragHandle ()Lcenter/sciprog/maps/features/DragHandle;
+	public final fun getOnCanvasSizeChange ()Lkotlin/jvm/functions/Function1;
+	public final fun getOnClick ()Lcenter/sciprog/maps/features/MouseListener;
+	public final fun getOnSelect ()Lkotlin/jvm/functions/Function1;
+	public final fun getOnViewChange ()Lkotlin/jvm/functions/Function1;
+	public final fun getZoomOnDoubleClick ()Z
+	public final fun getZoomOnSelect ()Z
+	public final fun getZoomSpeed ()F
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+}
+
+public abstract interface class center/sciprog/maps/features/ViewPoint {
+	public abstract fun getFocus ()Ljava/lang/Object;
+	public abstract fun getZoom ()F
+}
+
+public final class center/sciprog/maps/features/VisibleAttribute : center/sciprog/attributes/Attribute {
+	public static final field $stable I
+	public static final field INSTANCE Lcenter/sciprog/maps/features/VisibleAttribute;
+}
+
+public final class center/sciprog/maps/features/ZAttribute : center/sciprog/attributes/Attribute {
+	public static final field $stable I
+	public static final field INSTANCE Lcenter/sciprog/maps/features/ZAttribute;
+}
+
+public final class center/sciprog/maps/features/ZoomRangeAttribute : center/sciprog/attributes/Attribute {
+	public static final field $stable I
+	public static final field INSTANCE Lcenter/sciprog/maps/features/ZoomRangeAttribute;
+}
+

maps-kt-features/build.gradle.kts

@@ -0,0 +1,44 @@
+plugins {
+    id("space.kscience.gradle.mpp")
+    alias(spclibs.plugins.compose.compiler)
+    alias(spclibs.plugins.compose.jb)
+    `maven-publish`
+}
+
+val kmathVersion: String by rootProject.extra
+
+kscience {
+    jvm()
+//    js()
+    wasm{
+        browser {
+            testTask {
+                enabled = false
+            }
+        }
+    }
+
+    useCoroutines()
+
+    useSerialization {
+        json()
+    }
+
+    useSerialization(sourceSet = space.kscience.gradle.DependencySourceSet.TEST) {
+        protobuf()
+    }
+
+    commonMain{
+        api(projects.trajectoryKt)
+        api(compose.runtime)
+        api(compose.foundation)
+        api(compose.material)
+        api(compose.ui)
+        api("io.github.oshai:kotlin-logging:6.0.3")
+        api("com.benasher44:uuid:0.8.4")
+    }
+
+    jvmMain{
+        api("org.jfree:org.jfree.svg:5.0.4")
+    }
+}

maps-kt-features/src/commonMain/kotlin/space/kscience/maps/compose/canvasControls.kt

@@ -0,0 +1,189 @@
+package space.kscience.maps.compose
+
+import androidx.compose.foundation.gestures.drag
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.input.pointer.*
+import androidx.compose.ui.unit.DpOffset
+import androidx.compose.ui.unit.DpRect
+import androidx.compose.ui.unit.dp
+import space.kscience.maps.features.*
+import kotlin.math.max
+import kotlin.math.min
+
+
+/**
+ * Create a modifier for Map/Scheme canvas controls on desktop
+ * @param features a collection of features to be rendered in descending [ZAttribute] order
+ */
+public fun <T : Any> Modifier.canvasControls(
+    state: CanvasState<T>,
+    features: FeatureStore<T>,
+): Modifier = with(state) {
+
+//    //selecting all tapabales ahead of time
+//    val allTapable = buildMap {
+//        features.forEachWithAttribute(TapListenerAttribute) { _, feature, listeners ->
+//            put(feature, listeners)
+//        }
+//    }
+
+    pointerInput(Unit) {
+        awaitPointerEventScope {
+            while (true) {
+                val event = awaitPointerEvent()
+                val coordinates = toCoordinates(event.changes.first().position, this)
+                val point = state.space.ViewPoint(coordinates, zoom)
+
+                if (event.type == PointerEventType.Move) {
+                    features.forEachWithAttribute(HoverListenerAttribute) { _, feature, listeners ->
+                        if (point in feature as DomainFeature) {
+                            listeners.forEach { it.handle(event, point) }
+                            return@forEachWithAttribute
+                        }
+                    }
+                }
+            }
+        }
+    }.pointerInput(Unit) {
+        detectClicks(
+            onDoubleClick = if (viewConfig.zoomOnDoubleClick) {
+                { event ->
+                    val invariant = toCoordinates(event.position, this)
+                    viewPoint = with(space) {
+                        viewPoint.zoomBy(
+                            if (event.buttons.isPrimaryPressed) 1f else if (event.buttons.isSecondaryPressed) -1f else 0f,
+                            invariant
+                        )
+                    }
+                }
+            } else null,
+            onClick = { event ->
+                val coordinates = toCoordinates(event.position, this)
+                val point = space.ViewPoint(coordinates, zoom)
+
+                viewConfig.onClick?.handle(
+                    event,
+                    point
+                )
+
+                features.forEachWithAttributeUntil(ClickListenerAttribute) {_, feature, listeners ->
+                    if (point in (feature as DomainFeature)) {
+                        listeners.forEach { it.handle(event, point) }
+                        false
+                    } else {
+                        true
+                    }
+                }
+            }
+        )
+    }.pointerInput(Unit) {
+        awaitPointerEventScope {
+            while (true) {
+                val event: PointerEvent = awaitPointerEvent()
+                event.changes.forEach { change ->
+
+                    if (event.type == PointerEventType.Scroll) {
+                        val (xPos, yPos) = change.position
+                        //compute invariant point of translation
+                        val invariant = DpOffset(xPos.toDp(), yPos.toDp()).toCoordinates()
+                        viewPoint = with(space) {
+                            viewPoint.zoomBy(-change.scrollDelta.y * viewConfig.zoomSpeed, invariant)
+                        }
+                        change.consume()
+                    }
+
+                    //val dragStart = change.position
+                    //val dpPos = DpOffset(dragStart.x.toDp(), dragStart.y.toDp())
+
+                    //start selection
+                    val selectionStart: Offset? =
+                        if (event.buttons.isPrimaryPressed && event.keyboardModifiers.isShiftPressed) {
+                            change.position
+                        } else {
+                            null
+                        }
+
+                    drag(change.id) { dragChange ->
+                        val dragAmount: Offset = dragChange.position - dragChange.previousPosition
+
+                        //apply drag handle and check if it prohibits the drag even propagation
+                        if (selectionStart == null) {
+                            val dragStart = space.ViewPoint(
+                                toCoordinates(dragChange.previousPosition, this),
+                                zoom
+                            )
+                            val dragEnd = space.ViewPoint(
+                                toCoordinates(dragChange.position, this),
+                                zoom
+                            )
+                            val dragResult = viewConfig.dragHandle?.handle(event, dragStart, dragEnd)
+                            if (dragResult?.handleNext == false) return@drag
+
+                            var continueAfter = true
+
+                            features.forEachWithAttributeUntil(DraggableAttribute) { _, _, handler ->
+                                handler.handle(event, dragStart, dragEnd).handleNext.also {
+                                    if (!it) continueAfter = false
+                                }
+                            }
+
+                            if (!continueAfter) return@drag
+                        }
+
+                        if (event.buttons.isPrimaryPressed) {
+                            //If the selection process is started, modify the frame
+                            selectionStart?.let { start ->
+                                val offset = dragChange.position
+                                selectRect = DpRect(
+                                    min(offset.x, start.x).dp,
+                                    min(offset.y, start.y).dp,
+                                    max(offset.x, start.x).dp,
+                                    max(offset.y, start.y).dp
+                                )
+                                return@drag
+                            }
+
+//                            config.onClick(MapViewPoint(dpPos.toGeodetic(), viewPoint.zoom), event)
+                            //If no selection, drag map
+                            viewPoint = viewPoint.moveBy(
+                                -dragAmount.x.toDp(),
+                                dragAmount.y.toDp()
+                            )
+
+                        }
+                    }
+
+                    // evaluate selection
+                    selectRect?.let { rect ->
+                        //Use selection override if it is defined
+                        val coordinateRect = space.Rectangle(
+                            rect.topLeft.toCoordinates(),
+                            rect.bottomRight.toCoordinates()
+                        )
+                        viewConfig.onSelect(coordinateRect)
+                        if (viewConfig.zoomOnSelect) {
+                            viewPoint = computeViewPoint(coordinateRect)
+                        }
+                        selectRect = null
+                    }
+                }
+            }
+        }
+    }
+}
+
+/*
+.pointerInput(Unit) {
+        allTapable.forEach { (feature, listeners) ->
+            listeners.forEach { listener ->
+                detectTapGestures(listener.pointerMatcher, listener.keyboardFilter) { offset ->
+                    val point = space.ViewPoint(offset.toCoordinates(this@pointerInput), zoom)
+                    if (point in feature as DomainFeature) {
+                        listener.onTap(point)
+                    }
+                }
+            }
+        }
+    }
+ */

maps-kt-features/src/commonMain/kotlin/space/kscience/maps/compose/clickGestures.kt

@@ -0,0 +1,283 @@
+package space.kscience.maps.compose
+
+import androidx.compose.foundation.gestures.GestureCancellationException
+import androidx.compose.foundation.gestures.PressGestureScope
+import androidx.compose.foundation.gestures.awaitEachGesture
+import androidx.compose.foundation.gestures.detectTapGestures
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.input.pointer.*
+import androidx.compose.ui.platform.ViewConfiguration
+import androidx.compose.ui.unit.Density
+import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.sync.Mutex
+
+/*
+ * Clone of tap gestures for mouse
+ */
+
+private val NoPressGesture: suspend PressGestureScope.(event: PointerEvent) -> Unit = { }
+
+internal fun PointerEvent.consume() = changes.forEach { it.consume() }
+
+internal val PointerEvent.firstChange get() = changes.first()
+
+public val PointerEvent.position: Offset get() = firstChange.position
+
+
+/**
+ * An alternative to [detectTapGestures] with reimplementation of internal logic
+ */
+internal suspend fun PointerInputScope.detectClicks(
+    onDoubleClick: (Density.(PointerEvent) -> Unit)? = null,
+    onLongClick: (Density.(PointerEvent) -> Unit)? = null,
+    onPress: suspend PressGestureScope.(event: PointerEvent) -> Unit = NoPressGesture,
+    onClick: (Density.(PointerEvent) -> Unit)? = null,
+): Unit = coroutineScope {
+    // special signal to indicate to the sending side that it shouldn't intercept and consume
+    // cancel/up events as we're only require down events
+    val pressScope = PressGestureScopeImpl(this@detectClicks)
+
+    awaitEachGesture {
+        val down = awaitFirstDownEvent()
+        down.consume()
+
+        pressScope.reset()
+        if (onPress !== NoPressGesture) launch {
+            pressScope.onPress(down)
+        }
+        val longPressTimeout = onLongClick?.let {
+            viewConfiguration.longPressTimeoutMillis
+        } ?: (Long.MAX_VALUE / 2)
+        var upOrCancel: PointerEvent? = null
+        try {
+            // wait for first tap up or long press
+            upOrCancel = withTimeout(longPressTimeout) {
+                waitForUpOrCancellation()
+            }
+            if (upOrCancel == null) {
+                pressScope.cancel() // tap-up was canceled
+            } else {
+                upOrCancel.consume()
+                pressScope.release()
+            }
+        } catch (_: PointerEventTimeoutCancellationException) {
+            onLongClick?.invoke(this, down)
+            consumeUntilUp()
+            pressScope.release()
+        }
+
+        if (upOrCancel != null) {
+            // tap was successful.
+            if (onDoubleClick == null) {
+                onClick?.invoke(this, down) // no need to check for double-tap.
+            } else {
+                // check for second tap
+                val secondDown = awaitSecondDown(upOrCancel.firstChange)
+
+                if (secondDown == null) {
+                    onClick?.invoke(this, down) // no valid second tap started
+                } else {
+                    // Second tap down detected
+                    pressScope.reset()
+                    if (onPress !== NoPressGesture) {
+                        launch { pressScope.onPress(secondDown) }
+                    }
+
+                    try {
+                        // Might have a long second press as the second tap
+                        withTimeout(longPressTimeout) {
+                            val secondUp = waitForUpOrCancellation()
+                            if (secondUp != null) {
+                                secondUp.consume()
+                                pressScope.release()
+                                onDoubleClick(secondDown)
+                            } else {
+                                pressScope.cancel()
+                                onClick?.invoke(this, down)
+                            }
+                        }
+                    } catch (e: PointerEventTimeoutCancellationException) {
+                        // The first tap was valid, but the second tap is a long press.
+                        // notify for the first tap
+                        onClick?.invoke(this, down)
+
+                        // notify for the long press
+                        onLongClick?.invoke(this, secondDown)
+                        consumeUntilUp()
+                        pressScope.release()
+                    }
+                }
+            }
+        }
+    }
+}
+
+/**
+ * Consumes all pointer events until nothing is pressed and then returns. This method assumes
+ * that something is currently pressed.
+ */
+private suspend fun AwaitPointerEventScope.consumeUntilUp() {
+    do {
+        val event = awaitPointerEvent()
+        event.consume()
+    } while (event.changes.any { it.pressed })
+}
+
+/**
+ * Waits for [ViewConfiguration.doubleTapTimeoutMillis] for a second press event. If a
+ * second press event is received before the time-out, it is returned or `null` is returned
+ * if no second press is received.
+ */
+private suspend fun AwaitPointerEventScope.awaitSecondDown(
+    firstUp: PointerInputChange,
+): PointerEvent? = withTimeoutOrNull(viewConfiguration.doubleTapTimeoutMillis) {
+    val minUptime = firstUp.uptimeMillis + viewConfiguration.doubleTapMinTimeMillis
+    var event: PointerEvent
+    // The second tap doesn't count if it happens before DoubleTapMinTime of the first tap
+    do {
+        event = awaitFirstDownEvent()
+    } while (event.firstChange.uptimeMillis < minUptime)
+    event
+}
+
+///**
+// * Shortcut for cases when we only need to get press/click logic, as for cases without long press
+// * and double click we don't require channelling or any other complications.
+// *
+// * Each function parameter receives an [Offset] representing the position relative to the containing
+// * element. The [Offset] can be outside the actual bounds of the element itself meaning the numbers
+// * can be negative or larger than the element bounds if the touch target is smaller than the
+// * [ViewConfiguration.minimumTouchTargetSize].
+// */
+//internal suspend fun PointerInputScope.detectTapAndPress(
+//    onPress: suspend PressGestureScope.(event: PointerEvent, Offset) -> Unit = NoPressGesture,
+//    onTap: ((Offset) -> Unit)? = null,
+//) {
+//    val pressScope = PressGestureScopeImpl(this)
+//    forEachGesture {
+//        coroutineScope {
+//            pressScope.reset()
+//            awaitPointerEventScope {
+//
+//                val down = awaitFirstDownEvent()
+//
+//                down.consume()
+//
+//                if (onPress !== NoPressGesture) {
+//                    launch { pressScope.onPress(down, down.position) }
+//                }
+//
+//                val up = waitForUpOrCancellation()
+//                if (up == null) {
+//                    pressScope.cancel() // tap-up was canceled
+//                } else {
+//                    up.consume()
+//                    pressScope.release()
+//                    onTap?.invoke(up.position)
+//                }
+//            }
+//        }
+//    }
+//}
+
+/**
+ * Reads events until the first down is received. If [requireUnconsumed] is `true` and the first
+ * down is consumed in the [PointerEventPass.Main] pass, that gesture is ignored.
+ */
+internal suspend fun AwaitPointerEventScope.awaitFirstDownEvent(
+    requireUnconsumed: Boolean = true,
+): PointerEvent = awaitFirstDownEventOnPass(pass = PointerEventPass.Main, requireUnconsumed = requireUnconsumed)
+
+internal suspend fun AwaitPointerEventScope.awaitFirstDownEventOnPass(
+    pass: PointerEventPass,
+    requireUnconsumed: Boolean,
+): PointerEvent {
+    var event: PointerEvent
+    do {
+        event = awaitPointerEvent(pass)
+    } while (!event.changes.all {
+            if (requireUnconsumed) it.changedToDown() else it.changedToDownIgnoreConsumed()
+        })
+    return event
+}
+
+/**
+ * Reads events until all pointers are up or the gesture was canceled. The gesture
+ * is considered canceled when a pointer leaves the event region, a position change
+ * has been consumed or a pointer down change event was consumed in the [PointerEventPass.Main]
+ * pass. If the gesture was not canceled, the final up change is returned or `null` if the
+ * event was canceled.
+ */
+internal suspend fun AwaitPointerEventScope.waitForUpOrCancellation(): PointerEvent? {
+    while (true) {
+        val event = awaitPointerEvent(PointerEventPass.Main)
+        if (event.changes.all { it.changedToUp() }) {
+            // All pointers are up
+            return event
+        }
+
+        if (event.changes.any {
+                it.isConsumed || it.isOutOfBounds(size, extendedTouchPadding)
+            }
+        ) {
+            return null // Canceled
+        }
+
+        // Check for cancel by position consumption. We can look on the Final pass of the
+        // existing pointer event because it comes after the Main pass we checked above.
+        val consumeCheck = awaitPointerEvent(PointerEventPass.Final)
+        if (consumeCheck.changes.any { it.isConsumed }) {
+            return null
+        }
+    }
+}
+
+/**
+ * [detectTapGestures]'s implementation of [PressGestureScope].
+ */
+internal class PressGestureScopeImpl(
+    density: Density,
+) : PressGestureScope, Density by density {
+    private var isReleased = false
+    private var isCanceled = false
+    private val mutex = Mutex(locked = false)
+
+    /**
+     * Called when a gesture has been canceled.
+     */
+    fun cancel() {
+        isCanceled = true
+        mutex.unlock()
+    }
+
+    /**
+     * Called when all pointers are up.
+     */
+    fun release() {
+        isReleased = true
+        mutex.unlock()
+    }
+
+    /**
+     * Called when a new gesture has started.
+     */
+    fun reset() {
+        mutex.tryLock() // If tryAwaitRelease wasn't called, this will be unlocked.
+        isReleased = false
+        isCanceled = false
+    }
+
+    override suspend fun awaitRelease() {
+        if (!tryAwaitRelease()) {
+            throw GestureCancellationException("The press gesture was canceled.")
+        }
+    }
+
+    override suspend fun tryAwaitRelease(): Boolean {
+        if (!isReleased && !isCanceled) {
+            mutex.lock()
+        }
+        return isReleased
+    }
+}

maps-kt-features/src/commonMain/kotlin/space/kscience/maps/features/CanvasState.kt

@@ -0,0 +1,66 @@
+package space.kscience.maps.features
+
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.unit.*
+
+/**
+ * A state holder for current canvas size and view point. Allows transformation from coordinates to pixels and back
+ */
+public abstract class CanvasState<T: Any>(
+    public val viewConfig: ViewConfig<T>
+){
+    public abstract val space: CoordinateSpace<T>
+
+    private var canvasSizeState: MutableState<DpSize?> = mutableStateOf(null)
+    private var viewPointState: MutableState<ViewPoint<T>?> = mutableStateOf(null)
+
+    public var canvasSize: DpSize
+        get() = canvasSizeState.value ?: DpSize(512.dp, 512.dp)
+        set(value) {
+            canvasSizeState.value = value
+            viewConfig.onCanvasSizeChange(value)
+        }
+
+    public var viewPoint: ViewPoint<T>
+        get() = viewPointState.value ?: space.defaultViewPoint
+        set(value) {
+            viewPointState.value = value
+            viewConfig.onViewChange(viewPoint)
+        }
+
+    public val zoom: Float get() = viewPoint.zoom
+
+
+    // Selection rectangle. If null - no selection
+    public var selectRect: DpRect? by mutableStateOf(null)
+
+    public abstract fun Rectangle<T>.toDpRect(): DpRect
+
+    public abstract fun ViewPoint<T>.moveBy(x: Dp, y: Dp): ViewPoint<T>
+
+    public abstract fun computeViewPoint(rectangle: Rectangle<T>): ViewPoint<T>
+
+    public abstract fun DpOffset.toCoordinates(): T
+
+
+    public abstract fun T.toDpOffset(): DpOffset
+
+    public fun toCoordinates(offset: Offset, density: Density): T  = with(density){
+        val dpOffset = DpOffset(offset.x.toDp(), offset.y.toDp())
+        dpOffset.toCoordinates()
+    }
+
+    public fun toOffset(coordinates: T, density: Density): Offset = with(density){
+        val dpOffset = coordinates.toDpOffset()
+        return Offset(dpOffset.x.toPx(), dpOffset.y.toPx())
+    }
+
+}
+
+public val DpRect.topLeft: DpOffset get() = DpOffset(left, top)
+
+public val DpRect.bottomRight: DpOffset get() = DpOffset(right, bottom)

maps-kt-features/src/commonMain/kotlin/space/kscience/maps/features/CoordinateSpace.kt

@@ -0,0 +1,86 @@
+package space.kscience.maps.features
+
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.DpOffset
+import androidx.compose.ui.unit.DpSize
+import androidx.compose.ui.unit.dp
+import kotlin.math.abs
+import kotlin.math.sqrt
+
+
+public interface Area<T : Any> {
+    public operator fun contains(point: T): Boolean
+}
+
+/**
+ * A map coordinates rectangle. [a] and [b] represent opposing angles
+ * of the rectangle without specifying which ones.
+ */
+public interface Rectangle<T : Any> : Area<T> {
+    public val a: T
+    public val b: T
+
+    public val center: T
+}
+
+/**
+ * A context for map/scheme coordinates manipulation
+ */
+public interface CoordinateSpace<T : Any> {
+
+    /**
+     * Build a rectangle by two opposing corners
+     */
+    public fun Rectangle(first: T, second: T): Rectangle<T>
+
+    /**
+     * Build a rectangle of visual size [size]
+     */
+    public fun Rectangle(center: T, zoom: Float, size: DpSize): Rectangle<T>
+
+    /**
+     * A view point used by default
+     */
+    public val defaultViewPoint: ViewPoint<T>
+
+    /**
+     * Create a [ViewPoint] associated with this coordinate space.
+     */
+    public fun ViewPoint(center: T, zoom: Float): ViewPoint<T>
+
+    public fun ViewPoint<T>.moveBy(delta: T): ViewPoint<T>
+
+    public fun ViewPoint<T>.zoomBy(
+        zoomDelta: Float,
+        invariant: T = focus,
+    ): ViewPoint<T>
+
+    /**
+     * Move given rectangle to be centered at [center]
+     */
+    public fun Rectangle<T>.withCenter(center: T): Rectangle<T>
+
+    public fun Collection<Rectangle<T>>.wrapRectangles(): Rectangle<T>?
+
+    public fun Collection<T>.wrapPoints(): Rectangle<T>?
+
+    public fun T.offsetTo(b: T, zoom: Float): DpOffset
+
+    public fun T.distanceTo(b: T, zoom: Float): Dp {
+        val offset: DpOffset = offsetTo(b, zoom)
+        return sqrt(offset.x.value * offset.x.value + offset.y.value * offset.y.value).dp
+    }
+
+    public fun T.distanceToLine(a: T, b: T, zoom: Float): Dp {
+        val d12 = a.offsetTo(b, zoom)
+        val d01 = offsetTo(a, zoom)
+        val distanceVale = abs(d12.x.value * d01.y.value - d12.y.value * d01.x.value) / a.distanceTo(b, zoom).value
+
+        return distanceVale.dp
+    }
+
+    public fun T.isInsidePolygon(points: List<T>): Boolean
+}
+
+public fun <T : Any> CoordinateSpace<T>.Rectangle(viewPoint: ViewPoint<T>, size: DpSize): Rectangle<T> =
+    Rectangle(viewPoint.focus, viewPoint.zoom, size)

maps-kt-features/src/commonMain/kotlin/space/kscience/maps/features/DragHandle.kt

@@ -0,0 +1,56 @@
+package space.kscience.maps.features
+
+import androidx.compose.ui.input.pointer.PointerEvent
+import androidx.compose.ui.input.pointer.isPrimaryPressed
+
+/**
+ * @param result - the endpoint of the drag to perform constrained drag
+ * @param handleNext - if false do not evaluate subsequent drag handles
+ */
+public data class DragResult<T : Any>(val result: ViewPoint<T>, val handleNext: Boolean = true)
+
+public fun interface DragListener<in T : Any> {
+    public fun handle(event: PointerEvent, from: ViewPoint<T>, to: ViewPoint<T>)
+}
+
+public fun interface DragHandle<T : Any> {
+    /**
+     * @param event - qualifiers of the event used for drag
+     * @param start - is a point where drag begins, end is a point where drag ends
+     * @param end - end point of the drag
+     *
+     * @return true if default event processors should be used after this one
+     */
+    public fun handle(event: PointerEvent, start: ViewPoint<T>, end: ViewPoint<T>): DragResult<T>
+
+    public companion object {
+        public fun <T : Any> bypass(): DragHandle<T> = DragHandle<T> { _, _, end -> DragResult(end) }
+
+        /**
+         * Process only events with primary button pressed
+         */
+        public fun <T : Any> withPrimaryButton(
+            block: (event: PointerEvent, start: ViewPoint<T>, end: ViewPoint<T>) -> DragResult<T>,
+        ): DragHandle<T> = DragHandle { event, start, end ->
+            if (event.buttons.isPrimaryPressed) {
+                block(event, start, end)
+            } else {
+                DragResult(end)
+            }
+        }
+
+        /**
+         * Combine several handles into one
+         */
+        public fun <T : Any> combine(vararg handles: DragHandle<T>): DragHandle<T> = DragHandle { event, start, end ->
+            var current: ViewPoint<T> = end
+            handles.forEach {
+                val result = it.handle(event, start, current)
+                if (!result.handleNext) return@DragHandle result else {
+                    current = result.result
+                }
+            }
+            return@DragHandle DragResult(current)
+        }
+    }
+}

maps-kt-features/src/commonMain/kotlin/space/kscience/maps/features/Feature.kt

@@ -0,0 +1,365 @@
+package space.kscience.maps.features
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.Stable
+import androidx.compose.ui.geometry.Rect
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.ImageBitmap
+import androidx.compose.ui.graphics.Path
+import androidx.compose.ui.graphics.drawscope.DrawScope
+import androidx.compose.ui.graphics.drawscope.DrawStyle
+import androidx.compose.ui.graphics.drawscope.Fill
+import androidx.compose.ui.graphics.painter.Painter
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.graphics.vector.VectorPainter
+import androidx.compose.ui.graphics.vector.rememberVectorPainter
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.DpSize
+import androidx.compose.ui.unit.dp
+import org.jetbrains.skia.Font
+import space.kscience.attributes.Attributes
+import space.kscience.attributes.NameAttribute
+import space.kscience.kmath.geometry.Angle
+import space.kscience.kmath.nd.Structure2D
+
+public typealias FloatRange = ClosedFloatingPointRange<Float>
+
+public interface Feature<T : Any> {
+
+    public val space: CoordinateSpace<T>
+
+    public val attributes: Attributes
+
+    public fun getBoundingBox(zoom: Float = Float.MAX_VALUE): Rectangle<T>?
+
+    public fun withAttributes(modify: Attributes.() -> Attributes): Feature<T>
+}
+
+public val Feature<*>.color: Color? get() = attributes[ColorAttribute]
+
+public val Feature<*>.zoomRange: FloatRange
+    get() = attributes[ZoomRangeAttribute] ?: Float.NEGATIVE_INFINITY..Float.POSITIVE_INFINITY
+
+public val Feature<*>.name: String?
+    get() = attributes[NameAttribute]
+
+public interface PainterFeature<T : Any> : Feature<T> {
+    @Composable
+    public fun getPainter(): Painter
+}
+
+public interface DomainFeature<T : Any> : Feature<T> {
+    public operator fun contains(viewPoint: ViewPoint<T>): Boolean = getBoundingBox(viewPoint.zoom)?.let {
+        viewPoint.focus in it
+    } ?: false
+}
+
+public interface DraggableFeature<T : Any> : DomainFeature<T> {
+    public fun withCoordinates(newCoordinates: T): Feature<T>
+}
+
+/**
+ * A draggable marker feature. Other features could be bound to this one.
+ */
+public interface MarkerFeature<T : Any> : DraggableFeature<T> {
+    public val center: T
+}
+
+public fun <T : Any> Iterable<Feature<T>>.computeBoundingBox(
+    space: CoordinateSpace<T>,
+    zoom: Float,
+): Rectangle<T>? = with(space) {
+    mapNotNull { it.getBoundingBox(zoom) }.wrapRectangles()
+}
+
+/**
+ * A feature that decides what to show depending on the zoom value (it could change size of shape)
+ */
+@Stable
+public data class FeatureSelector<T : Any>(
+    override val space: CoordinateSpace<T>,
+    override val attributes: Attributes = Attributes.EMPTY,
+    public val selector: (zoom: Float) -> Feature<T>,
+) : Feature<T> {
+
+    override fun getBoundingBox(zoom: Float): Rectangle<T>? = selector(zoom).getBoundingBox(zoom)
+
+    override fun withAttributes(modify: Attributes.() -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+}
+
+@Stable
+public data class PathFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    public val rectangle: Rectangle<T>,
+    public val path: Path,
+    public val brush: Brush,
+    public val style: DrawStyle = Fill,
+    public val targetRect: Rect = path.getBounds(),
+    override val attributes: Attributes = Attributes.EMPTY,
+) : DraggableFeature<T> {
+    override fun withCoordinates(newCoordinates: T): Feature<T> = with(space) {
+        PathFeature(
+            space = space,
+            rectangle = rectangle.withCenter(newCoordinates),
+            path = path,
+            brush = brush,
+            style = style,
+            targetRect = targetRect,
+        )
+    }
+
+    override fun getBoundingBox(zoom: Float): Rectangle<T> = rectangle
+    override fun withAttributes(modify: Attributes.() -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+}
+
+@Stable
+public data class PointsFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    public val points: List<T>,
+    override val attributes: Attributes = Attributes.EMPTY,
+) : Feature<T> {
+
+    private val boundingBox by lazy {
+        with(space) { points.wrapPoints() }
+    }
+
+    override fun getBoundingBox(zoom: Float): Rectangle<T>? = boundingBox
+    override fun withAttributes(modify: (Attributes) -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+}
+
+
+public interface LineSegmentFeature<T : Any> : Feature<T>
+
+@Stable
+public data class LineFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    public val a: T,
+    public val b: T,
+    override val attributes: Attributes = Attributes.EMPTY,
+) : DomainFeature<T>, LineSegmentFeature<T> {
+    override fun getBoundingBox(zoom: Float): Rectangle<T> = space.Rectangle(a, b)
+
+    val center: T by lazy { getBoundingBox().center }
+
+    override fun contains(viewPoint: ViewPoint<T>): Boolean = with(space) {
+        val length = a.distanceTo(b, viewPoint.zoom)
+        viewPoint.focus.distanceTo(center, viewPoint.zoom) <= length / 2 &&
+                viewPoint.focus.distanceToLine(a, b, viewPoint.zoom).value <= clickRadius
+    }
+
+    override fun withAttributes(modify: (Attributes) -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+}
+
+public data class MultiLineFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    public val points: List<T>,
+    override val attributes: Attributes = Attributes.EMPTY,
+) : DomainFeature<T>, LineSegmentFeature<T> {
+
+    private val boundingBox by lazy {
+        with(space) { points.wrapPoints() }
+    }
+
+    override fun getBoundingBox(zoom: Float): Rectangle<T>? = boundingBox
+    override fun withAttributes(modify: (Attributes) -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+
+    override fun contains(viewPoint: ViewPoint<T>): Boolean = with(space) {
+        val boundingBox = getBoundingBox(viewPoint.zoom) ?: return@with false
+        viewPoint.focus in boundingBox && points.zipWithNext().minOf { (a, b) ->
+            viewPoint.focus.distanceToLine(
+                a,
+                b,
+                viewPoint.zoom
+            ).value
+        } < clickRadius
+    }
+}
+
+
+private val <T : Any, F : LineSegmentFeature<T>> F.clickRadius get() = attributes[ClickRadius] ?: 10f
+
+
+@Stable
+public data class PolygonFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    public val points: List<T>,
+    override val attributes: Attributes = Attributes.EMPTY,
+) : DomainFeature<T> {
+
+    private val boundingBox: Rectangle<T>? by lazy {
+        with(space) { points.wrapPoints() }
+    }
+
+    override fun getBoundingBox(zoom: Float): Rectangle<T>? = boundingBox
+
+    override fun contains(viewPoint: ViewPoint<T>): Boolean {
+        val boundingBox = boundingBox ?: return false
+        return viewPoint.focus in boundingBox && with(space) { viewPoint.focus.isInsidePolygon(points) }
+    }
+
+    override fun withAttributes(modify: (Attributes) -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+}
+
+@Stable
+public data class CircleFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    override val center: T,
+    public val radius: Dp = 5.dp,
+    override val attributes: Attributes = Attributes.EMPTY,
+) : MarkerFeature<T> {
+    override fun getBoundingBox(zoom: Float): Rectangle<T> =
+        space.Rectangle(center, zoom, DpSize(radius * 2, radius * 2))
+
+    override fun contains(viewPoint: ViewPoint<T>): Boolean = with(space) {
+        viewPoint.focus.distanceTo(center, viewPoint.zoom) < radius
+    }
+
+    override fun withCoordinates(newCoordinates: T): Feature<T> = copy(center = newCoordinates)
+
+    override fun withAttributes(modify: (Attributes) -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+}
+
+@Stable
+public data class RectangleFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    override val center: T,
+    public val size: DpSize = DpSize(5.dp, 5.dp),
+    override val attributes: Attributes = Attributes.EMPTY,
+) : MarkerFeature<T> {
+    override fun getBoundingBox(zoom: Float): Rectangle<T> =
+        space.Rectangle(center, zoom, size)
+
+    override fun withCoordinates(newCoordinates: T): Feature<T> = copy(center = newCoordinates)
+
+    override fun withAttributes(modify: (Attributes) -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+}
+
+/**
+ * @param startAngle the angle from 3 o'clock downwards for the start of the arc in radians
+ * @param arcLength arc length in radians
+ */
+@Stable
+public data class ArcFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    public val oval: Rectangle<T>,
+    public val startAngle: Angle,
+    public val arcLength: Angle,
+    override val attributes: Attributes = Attributes.EMPTY,
+) : DraggableFeature<T> {
+    override fun getBoundingBox(zoom: Float): Rectangle<T> = oval
+
+    override fun withCoordinates(newCoordinates: T): Feature<T> =
+        copy(oval = with(space) { oval.withCenter(newCoordinates) })
+
+    override fun withAttributes(modify: (Attributes) -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+}
+
+public data class DrawFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    public val position: T,
+    override val attributes: Attributes = Attributes.EMPTY,
+    public val drawFeature: DrawScope.() -> Unit,
+) : DraggableFeature<T> {
+    override fun getBoundingBox(zoom: Float): Rectangle<T> = space.Rectangle(position, position)
+
+    override fun withCoordinates(newCoordinates: T): Feature<T> = copy(position = newCoordinates)
+
+    override fun withAttributes(modify: (Attributes) -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+}
+
+/**
+ * Fixed size bitmap icon
+ */
+@Stable
+public data class BitmapIconFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    override val center: T,
+    public val size: DpSize,
+    public val image: ImageBitmap,
+    override val attributes: Attributes = Attributes.EMPTY,
+) : MarkerFeature<T> {
+    override fun getBoundingBox(zoom: Float): Rectangle<T> = space.Rectangle(center, zoom, size)
+
+    override fun withCoordinates(newCoordinates: T): Feature<T> = copy(center = newCoordinates)
+
+    override fun withAttributes(modify: (Attributes) -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+}
+
+/**
+ * Fixed size vector icon
+ */
+@Stable
+public data class VectorIconFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    override val center: T,
+    public val size: DpSize,
+    public val image: ImageVector,
+    override val attributes: Attributes = Attributes.EMPTY,
+) : MarkerFeature<T>, PainterFeature<T> {
+    override fun getBoundingBox(zoom: Float): Rectangle<T> = space.Rectangle(center, zoom, size)
+
+    override fun withCoordinates(newCoordinates: T): Feature<T> = copy(center = newCoordinates)
+
+    override fun withAttributes(modify: (Attributes) -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+
+    @Composable
+    override fun getPainter(): VectorPainter = rememberVectorPainter(image)
+}
+
+/**
+ * An image that is bound to coordinates and is scaled (and possibly warped) together with them
+ *
+ * @param rectangle the size of background in scheme size units. The screen units to scheme units ratio equals scale.
+ */
+public data class ScalableImageFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    public val rectangle: Rectangle<T>,
+    override val attributes: Attributes = Attributes.EMPTY,
+    public val painter: @Composable () -> Painter,
+) : Feature<T>, PainterFeature<T> {
+    @Composable
+    override fun getPainter(): Painter = painter.invoke()
+
+    override fun getBoundingBox(zoom: Float): Rectangle<T> = rectangle
+
+    override fun withAttributes(modify: (Attributes) -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+}
+
+
+public data class TextFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    public val position: T,
+    public val text: String,
+    override val attributes: Attributes = Attributes.EMPTY,
+    public val fontConfig: Font.() -> Unit,
+) : DraggableFeature<T> {
+    override fun getBoundingBox(zoom: Float): Rectangle<T> = space.Rectangle(position, position)
+
+    override fun withCoordinates(newCoordinates: T): Feature<T> = copy(position = newCoordinates)
+
+    override fun withAttributes(modify: (Attributes) -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+}
+
+/**
+ * A pixel map representation on the map/scheme.
+ * [rectangle] describes the boundary of the pixel map.
+ * [pixelMap] contained indexed color of pixels. Minimal indices correspond to bottom-left corner of the rectangle.
+ * Maximal indices - top-right.
+ */
+public data class PixelMapFeature<T : Any>(
+    override val space: CoordinateSpace<T>,
+    val rectangle: Rectangle<T>,
+    val pixelMap: Structure2D<Color?>,
+    override val attributes: Attributes = Attributes.EMPTY,
+) : Feature<T> {
+
+    init {
+        require(pixelMap.shape[0] > 0) { "Empty dimensions in pixel map are not allowed" }
+        require(pixelMap.shape[1] > 0) { "Empty dimensions in pixel map are not allowed" }
+    }
+
+    override fun getBoundingBox(zoom: Float): Rectangle<T> = rectangle
+
+    override fun withAttributes(modify: Attributes.() -> Attributes): Feature<T> = copy(attributes = modify(attributes))
+}

maps-kt-features/src/commonMain/kotlin/space/kscience/maps/features/FeatureDrawScope.kt

@@ -0,0 +1,147 @@
+package space.kscience.maps.features
+
+import androidx.compose.foundation.Canvas
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.key