Maps
You can use a scene
- Display a basemap layer
A basemap layer is the layer in a map or scene that displays basemap data. The data source for a basemap layer is typically a basemap service. such as streets or satellite imagery. - Access and display data layers
A data layer is a layer that references geographic data from a file or a service and is used to visualize the data in a map or scene. based on files or services, including data you have authored. - Display terrain with an elevation layer
An elevation layer is a layer that defines the ground height or the surface for a scene. . - Display real-world objects such as buildings, cars, and trees.
- Display 3D visualizations of 2D objects.
- Perform 3D analysis, such as line-of-sight, visibility, and 3D measurements.
- Provide context for temporary points, lines, polygons, or text displayed as graphics
A graphic is a visual element composed of a geometry, symbol, and attributes that is displayed on a map or scene. . - Measure distance and explore spatial relationships between geometries
A geometry is a geometric shape, such as a point, polyline, or polygon, that contains one or more coordinates and a spatial reference. . - Inspect data layers and display information from attributes
Attributes are fields and values for a single feature or non-spatial record. They are typically stored in a database or service such as a feature service. .
How a scene works
A scene
For offline
Scene
A scene contains a collection of layers
You can instantiate a new ArcGISScene object by creating a new scene and building it entirely with code. With this approach, you typically first add a basemap layer
// API key authentication or user authentication is required to access basemaps and other location services. ArcGISEnvironment.apiKey = ApiKey.create(YOUR_ACCESS_TOKEN)
// Create a map with an ArcGIS basemap style. val scene = ArcGISScene(BasemapStyle.ArcGISTopographic)
val worldElevationServiceURL = "https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer" val elevationSource = ArcGISTiledElevationSource(worldElevationServiceURL) val surface = Surface().apply { elevationSources.add(elevationSource) } scene.baseSurface = surface
val point = Point( x = -118.808, y = 33.961, z = 2000.0, spatialReference = SpatialReference.wgs84() )
val nullIslandPoint = Point( x = 0.0, y = 0.0, z = 0.0, spatialReference = SpatialReference.wgs84() )
val camera = Camera( locationPoint = point, heading = 0.0, pitch = 75.0, roll = 0.0 )You can also instantiate an ArcGISScene that’s stored in a portal
val portal = Portal("https://www.arcgis.com", Portal.Connection.Anonymous) val portalItem = PortalItem(portal, "31874da8a16d45bfbc1273422f772270")
var scene = ArcGISScene(portalItem)
// Or you can use the URL of the portal item: // val scene = ArcGISScene("https://www.arcgis.com/home/item.html?id=31874da8a16d45bfbc1273422f772270")When the ArcGISScene first appears in the SceneView, you can focus the initial display at a specified view point with the ArcGISScene.initialViewpoint method. If an initial view point is not defined, the scene will initially display at a global scale.
Layer
Each layer
Scenes can also contain scene layers
The Layer class is the base class for all types of layers. The type of layer you create depends on the type of data you want to display. For example, to display feature data you can create a FeatureLayer that references an online service (such as a feature serviceArcGISVectorTiledLayer and AnnotationLayer. Similarly, 3D layers cannot be displayed in a mapArcGISSceneLayer.
ArcGISEnvironment.apiKey = ApiKey.create(YOUR_ACCESS_TOKEN)
scene = ArcGISScene(BasemapStyle.ArcGISTopographic)
val trailheadsLayer = FeatureLayer.createWithFeatureTable( ServiceFeatureTable("https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/Trailheads_Styled/FeatureServer/0") )
val trailsLayer = FeatureLayer.createWithFeatureTable( ServiceFeatureTable("https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/Trails_Styled/FeatureServer/0") )
val openSpacesLayer = FeatureLayer.createWithFeatureTable( ServiceFeatureTable("https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/Parks_and_Open_Space_Styled/FeatureServer/0") )
scene.operationalLayers.addAll(listOf(openSpacesLayer, trailsLayer, trailheadsLayer))Camera
Scenes and scene views extend the concept of two dimensional viewpoints with a camera
The following properties define the camera position:
- Geographic location on the surface (longitude and latitude)
- Altitude (height, in meters, above sea level)
- Heading (angle about the z axis the camera is rotated, in degrees)
- Pitch (angle the camera is rotated up or down, in degrees)
- Roll (angle the camera is rotated side-to-side, in degrees)
val cameraLocation = Point( x = 13.409444, y = 52.520833, z = 1000.0, spatialReference = SpatialReference.wgs84() )
val sceneCamera = Camera( locationPoint = cameraLocation, heading = 180.0, pitch = 0.0, roll = 0.0 )
sceneViewProxy.setViewpointCamera(sceneCamera)
// Alternative: When creating the ArcGISScene instance, you can set the ArcGISScene.initialViewpoint property.A scene view
When a camera controller other than the default GlobeCameraController is active, the scene view’s viewpoint cannot be assigned. Attempts to do so do not raise an exception, but they are ignored.
The following camera controllers are available:
GlobeCameraController(default)—Provides the default scene view camera behavior. Allows the user to freely move and focus the camera anywhere in the scene.OrbitGeoElementCameraController—Locks the scene view’s camera to maintain focus relative to a (possibly moving) graphic. The camera can only move relative to the target graphic.OrbitLocationCameraController—Locks the scene view’s camera to orbit a fixed location (map point). The camera can only move relative to the target map point.TransformationMatrixCameraController—Provides navigation by using aTransformationMatrixto control the camera’s location and rotation. You need to pass this object to allTransformationMatrixCameraControllerfunctions. This can be used with transformation matrices produced by Augmented Reality APIs like ARKit (iOS) and ARCore (Android).
val sceneViewProxy = remember { SceneViewProxy() }
// Create a camera controller to orbit a stationary geoelement in the scene view. // Pass geoelement (graphic) and distance (meters). Geoelement here is green diamond at Berlin TV Tower. cameraController = OrbitGeoElementCameraController( targetGeoElement = berlinTvTowerGraphic, distance = 500.0 ).apply { setCameraPitchOffset(75.0) }
SceneView( // Pass the scene to the Composable SceneView. arcGISScene = scene, cameraController = cameraController, graphicsOverlays = graphicsOverlays, sceneViewProxy = sceneViewProxy,
)SceneView
A scene view
After creating a scene view
Add an ArcGISScene to a SceneView control to display it. Changes you make to the scene, such as adding, removing, or reording layers, will immediately be reflected in the display. The ArcGISScene.initialViewpoint method will set the area shown when the scene loads.
scene.initialViewpoint = Viewpoint(point, camera)
// The Compose equivalent of the view-based SceneView class. SceneView( modifier = Modifier.fillMaxSize(), // Pass the scene to the Composable SceneView. arcGISScene = scene )A scene view
- Adjust light, atmosphere, and space effects.
- Display image overlays on the scene surface.
- Lock the camera to a location or geoelement
A geoelement refers to any geographic element in a map or map view that can be identified by its location to return attribute information. . - Add analysis overlays to visualize analysis results.
- Identify and select features using a mouse or tap location.
- Export an image of the current display.
- Apply a time extent to filter the display of features.
Examples
Display a scene with elevation
This example uses an ArcGISScene and SceneView to display the topographic basemap layerCamera is created to define the initial view of the scene.
Steps
- Create an
ArcGISSceneand add a basemap layerA basemap layer is the layer in a map or scene that displays basemap data. The data source for a basemap layer is typically a basemap service. . - Use an elevation service with
ArcGISScene.baseSurfaceto define a base surface. - Create a
SceneViewand set the cameraA camera defines the rendering viewpoint of a 3D scene in a scene view. position.
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package com.example.guide.scenes3d.displayascenewithelevation.example
import android.os.Bundleimport androidx.activity.compose.setContentimport androidx.appcompat.app.AppCompatActivityimport androidx.compose.foundation.layout.fillMaxSizeimport androidx.compose.material3.MaterialThemeimport androidx.compose.ui.Modifierimport com.arcgismaps.ApiKeyimport com.arcgismaps.ArcGISEnvironmentimport com.arcgismaps.geometry.Pointimport com.arcgismaps.geometry.SpatialReferenceimport com.arcgismaps.mapping.ArcGISSceneimport com.arcgismaps.mapping.ArcGISTiledElevationSourceimport com.arcgismaps.mapping.BasemapStyleimport com.arcgismaps.mapping.Surfaceimport com.arcgismaps.mapping.Viewpointimport com.arcgismaps.mapping.view.Cameraimport com.arcgismaps.toolkit.geoviewcompose.SceneViewimport com.example.guide.scenes3d.displayascenewithelevation.example.BuildConfig.YOUR_ACCESS_TOKEN
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState)
// API key authentication or user authentication is required to access basemaps and other location services. ArcGISEnvironment.apiKey = ApiKey.create(YOUR_ACCESS_TOKEN) setContent { MaterialTheme {
// Create a map with an ArcGIS basemap style. val scene = ArcGISScene(BasemapStyle.ArcGISTopographic)
val elevationSource = ArcGISTiledElevationSource("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer") val surface = Surface().apply { elevationSources.add(elevationSource) }
val point = Point( x = -118.808, y = 33.961, z = 2000.0, spatialReference = SpatialReference.wgs84() ) val camera = Camera( locationPoint = point, heading = 0.0, pitch = 75.0, roll = 0.0 ) scene.apply { baseSurface = surface initialViewpoint = Viewpoint(point, camera) }
SceneView( modifier = Modifier.fillMaxSize(), // Pass the map to the Composable SceneView. arcGISScene = scene )5 collapsed lines
} } }}Display a scene from a mobile scene package
This example displays a scene
Steps
- Create a
MobileScenePackageusing the path to a local .mspk file. - Call
MobileScenePackage.load()to load the package. - When the package loads, get the first scene from the package using
MobileScenePackage.scenes. - Display the scene in a
SceneView.
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package com.example.guide.scenes3d.displayascenewithamobilescenepackage.example
import android.os.Bundleimport android.util.Logimport androidx.activity.compose.setContentimport androidx.appcompat.app.AppCompatActivityimport androidx.compose.foundation.layout.fillMaxSizeimport androidx.compose.material3.MaterialThemeimport androidx.compose.runtime.getValueimport androidx.compose.runtime.mutableStateOfimport androidx.compose.runtime.setValueimport androidx.compose.ui.Modifierimport androidx.lifecycle.lifecycleScopeimport com.arcgismaps.ApiKeyimport com.arcgismaps.ArcGISEnvironmentimport com.arcgismaps.mapping.ArcGISSceneimport com.arcgismaps.mapping.BasemapStyleimport com.arcgismaps.mapping.MobileScenePackageimport com.arcgismaps.toolkit.geoviewcompose.SceneViewimport com.example.guide.scenes3d.displayascenewithamobilescenepackage.example.BuildConfig.YOUR_ACCESS_TOKENimport kotlinx.coroutines.launchimport java.io.File
class MainActivity : AppCompatActivity() {
private val pathToAppStorageDir: String by lazy { getExternalFilesDir(null)?.path.toString() + File.separator + getString(R.string.app_name) }
private val provisionPath: String by lazy { getExternalFilesDir(null)?.path.toString() + File.separator + getString(R.string.app_name) }
private var scene by mutableStateOf(ArcGISScene(BasemapStyle.ArcGISImagery))
override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) // API key authentication or user authentication is required to access basemaps // and other location services. ArcGISEnvironment.apiKey = ApiKey.create(YOUR_ACCESS_TOKEN)
// Get the file path of the (.mmpk) file. val filePath = provisionPath + File.separator + getString(R.string.philadelphia_mspk)
// Load and add the mobile map package. addMobileScenePackage(filePath)
setContent { MaterialTheme { // Compose equivalent of the view-based MapView class. SceneView( arcGISScene = scene, modifier = Modifier.fillMaxSize() ) } } }
fun addMobileScenePackage(filePath: String) {
// Create the mobile map package val scenePackage = MobileScenePackage(filePath) lifecycleScope.launch { // Load the mobile map package. scenePackage.load().getOrElse { // Mobile map package failed to load. showError("Map package failed to load: ${it.message.toString()}") } // Add the loaded map from the mobile map package to the mutable ArcGISMap used by the Composable MapView. scene = scenePackage.scenes.first() }8 collapsed lines
}
private fun showError(message: String) { Log.e(this::javaClass.name, message) }
}
