Display a scene

Learn how to create and display a scene with a basemap layer and an elevation layer. Set properties of the scene's camera to control the 3D perspective.

Like a map, a scene contains layers of geographic data. It contains a basemap layer and, optionally, one or more data layers. To provide a realistic view of the terrain, you can also add elevation layers to define the height of the surface across the scene. The 3D perspective of the scene is controlled by the scene's camera, which defines the position of the scene observer in 3D space.

In this tutorial, you create and display a scene using the imagery basemap layer. The surface of the scene is defined with an elevation layer and the camera is positioned to display an area of the Santa Monica Mountains in the scene view.

The scene and code will be used as the starting point for other 3D tutorials.

Prerequisites

Steps

Create a new Android Studio project

Use Android Studio to create an app and configure it to reference the API.

1. Open Android Studio.

   • In the Welcome to Android Studio window, click New Project.

     Or if you already have Android Studio opened, click File > New > New Project in the menu bar.

   • In the New Project window, make sure Phone and Tablet tab is selected, and then select Empty Activity. Click Next.

   • In the next window, set the following options and then click Finish.

     • Name: Display a scene.
     • Package name: Change to com.example.app. Or change to match your organization.
     • Save location: Set to a new folder.
     • Minimum SDK: API 26 ("Oreo"; Android 8.0)
     • Build configuration language: Kotlin DSL (build.gradle.kts)

2. In the Project tool window, make sure that your current view is Android. These tutorial instructions refer to that view.

   More info

   If your view name is something other than Android (such as Project or Packages), click on the leftmost control in the title bar of the Project tool window, and select Android from the list.

   

3. From the Project tool window, open Gradle Scripts > build.gradle.kts (Project: Display_a_scene). Replace the contents of the file with the following code:

   build.gradle.kts (Project: Display_a_scene)

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   // Top-level build file where you can add configuration options common to all sub-projects/modules.
   plugins {
       alias(libs.plugins.android.application) apply false
       alias(libs.plugins.jetbrains.kotlin.android) apply false
   }

4. From the Project tool window, open Gradle Scripts > build.gradle.kts (Module :app). Replace the contents of the file with the expanded code below:

   build.gradle.kts (Module: app)

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       // ArcGIS Maps for Kotlin - SDK dependency
       implementation(libs.arcgis.maps.kotlin)
       // Toolkit dependencies
       implementation(platform(libs.arcgis.maps.kotlin.toolkit.bom))
       implementation(libs.arcgis.maps.kotlin.toolkit.geoview.compose)
       // Additional modules from Toolkit, if needed, such as:
       // implementation(libs.arcgis.maps.kotlin.toolkit.authentication)
   

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5. From the Project tool window, open Gradle Scripts > libs.versions.toml` and replace its contents with the expanded code below.

   Gradle version catalogs are the standard Android approach to declaring dependency versions. They are preferred over specifying versions numbers in the build.gradle.kts or listing version numbers in a version.gradle. Note that in recent releases of Android Studio, the New Project Wizard generates build.gradle.kts and gradle/libs.versions.toml files that support this standard.

   The highlights below indicate lines that we are adding to the default gradle/libs.versions.toml generated by the Android Studio New Project Wizard.

   gradle/libs.versions.toml

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   [versions]
   arcgisMapsKotlin = "200.5.0"
   

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6. From the Project tool window, open Gradle Scripts > settings.gradle.kts. Replace the contents of the file with the expanded code below:

   settings.gradle.kts (Project Settings)

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   dependencyResolutionManagement {
       repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
       repositories {
           google()
           mavenCentral()
           maven { url = uri("https://esri.jfrog.io/artifactory/arcgis") }
       }
   }
   rootProject.name = "Display a scene"
   include(":app")

7. Sync the Gradle changes. Click the Sync now prompt or click the refresh icon (Sync Project with Gradle Files) in the toolbar. This may take several minutes.

8. From the Project tool window, open app > manifests > AndroidManifest.xml. Update the Android manifest to allow internet access.

   Insert these new elements within the manifest element. Do not alter or remove any other statements.

   Depending on what ArcGIS functionality you add in future tutorials, it is likely you will need to add additional permissions to your manifest.

   AndroidManifest.xml

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   Add line.

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   <manifest xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:tools="http://schemas.android.com/tools">
   
       <uses-permission android:name="android.permission.INTERNET" />
   

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Create a scene

1. From the Project tool window, right click on app > kotlin+java > com.example.app, select New > package from the list. Enter com.example.app.screens as the package name. Hit Enter on your keyboard. This step creates a new package that will contain all the UI files.

2. Right click on the screens package you just created, select New > Kotlin Class/File from the list. In the pop-up window, select File and enter MainScreen as the file name. Hit Enter on your keyboard.

3. In MainScreen.kt, delete any lines of code that were inserted automatically by Android Studio. Then add the following OptIn annotation, package name, and imports.

   MainScreen.kt

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   @file:OptIn(ExperimentalMaterial3Api::class)
   
   package com.example.app.screens
   
   import androidx.compose.foundation.layout.fillMaxSize
   import androidx.compose.foundation.layout.padding
   import androidx.compose.material3.ExperimentalMaterial3Api
   import androidx.compose.material3.Scaffold
   import androidx.compose.material3.Text
   import androidx.compose.material3.TopAppBar
   import androidx.compose.runtime.Composable
   import androidx.compose.runtime.remember
   import androidx.compose.ui.Modifier
   import androidx.compose.ui.res.stringResource
   import com.arcgismaps.geometry.Point
   import com.arcgismaps.geometry.SpatialReference
   import com.arcgismaps.mapping.ArcGISScene
   import com.arcgismaps.mapping.ArcGISTiledElevationSource
   import com.arcgismaps.mapping.BasemapStyle
   import com.arcgismaps.mapping.Surface
   import com.arcgismaps.mapping.Viewpoint
   import com.arcgismaps.mapping.view.Camera
   import com.arcgismaps.toolkit.geoviewcompose.SceneView
   import com.example.app.R
   
   

4. You will start by creating a function named createScene().

   Inside that function, you will create an ArcGISScene, assign a base surface to it, and use the top-level composable function remember to retain state across recompositions.

   Then you will create a camera location and a Camera, use them to create a Viewpoint, and then assign the view point to the initialViewpoint property of the ArcGISScene.

   1. Create a top-level function named createScene() that returns an ArcGISScene.

      MainScreen.kt

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      fun createScene(): ArcGISScene {
      
      }

   2. Create a new ArcGISTiledElevationSource. Then create a Surface and, inside the apply block for Surface, add the elevation source to the elevationSources property, and set the elevationExaggeration property to 2.5f, which increases the 3D effect of the elevation.

      More info

      An elevation source can define a surface with 3D terrain in a scene. Without an elevation source, the default globe surface is used to display the scene.

      MainScreen.kt

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      fun createScene(): ArcGISScene {
      
          // add base surface for elevation data
          val elevationSource = ArcGISTiledElevationSource("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")
          val surface = Surface().apply {
              elevationSources.add(elevationSource)
              // add an exaggeration factor to increase the 3D effect of the elevation.
              elevationExaggeration = 2.5f
          }
      
      }

   3. Create a Point for the camera and assign it to the variable cameraLocation. Then create a Camera, passing the camera ocation and values for the camera's heading, pitch, and roll.

      MainScreen.kt

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      fun createScene(): ArcGISScene {
      
          // add base surface for elevation data
          val elevationSource = ArcGISTiledElevationSource("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")
          val surface = Surface().apply {
              elevationSources.add(elevationSource)
              // add an exaggeration factor to increase the 3D effect of the elevation.
              elevationExaggeration = 2.5f
          }
      
          val cameraLocation = Point(
              x = -118.794,
              y = 33.909,
              z = 5330.0,
              spatialReference = SpatialReference.wgs84()
          )
      
          val camera = Camera(
              locationPoint = cameraLocation,
              heading = 355.0,
              pitch = 72.0,
              roll = 0.0
          )
      
      }

   4. Create an ArcGISScene with a BasemapStyle.ArcGISImagery. Then call apply() on the new ArcGISScene. The createScene() function returns this ArcGISScene.

      More info

      For more information on apply(), see Kotlin scope functions.

      MainScreen.kt

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      fun createScene(): ArcGISScene {
      
          // add base surface for elevation data
          val elevationSource = ArcGISTiledElevationSource("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")
          val surface = Surface().apply {
              elevationSources.add(elevationSource)
              // add an exaggeration factor to increase the 3D effect of the elevation.
              elevationExaggeration = 2.5f
          }
      
          val cameraLocation = Point(
              x = -118.794,
              y = 33.909,
              z = 5330.0,
              spatialReference = SpatialReference.wgs84()
          )
      
          val camera = Camera(
              locationPoint = cameraLocation,
              heading = 355.0,
              pitch = 72.0,
              roll = 0.0
          )
      
          return ArcGISScene(BasemapStyle.ArcGISImagery).apply {
      
          }
      
      }

   5. In the apply block, set the baseSurface property of the ArcGISScene to surface.

      MainScreen.kt

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      fun createScene(): ArcGISScene {
      
          // add base surface for elevation data
          val elevationSource = ArcGISTiledElevationSource("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")
          val surface = Surface().apply {
              elevationSources.add(elevationSource)
              // add an exaggeration factor to increase the 3D effect of the elevation.
              elevationExaggeration = 2.5f
          }
      
          val cameraLocation = Point(
              x = -118.794,
              y = 33.909,
              z = 5330.0,
              spatialReference = SpatialReference.wgs84()
          )
      
          val camera = Camera(
              locationPoint = cameraLocation,
              heading = 355.0,
              pitch = 72.0,
              roll = 0.0
          )
      
          return ArcGISScene(BasemapStyle.ArcGISImagery).apply {
      
              baseSurface = surface
      
          }
      
      }

   6. Create a Viewpoint using cameraLocation and camera and set it as the initial viewpoint for the scene.

      MainScreen.kt

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      fun createScene(): ArcGISScene {
      
          // add base surface for elevation data
          val elevationSource = ArcGISTiledElevationSource("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")
          val surface = Surface().apply {
              elevationSources.add(elevationSource)
              // add an exaggeration factor to increase the 3D effect of the elevation.
              elevationExaggeration = 2.5f
          }
      
          val cameraLocation = Point(
              x = -118.794,
              y = 33.909,
              z = 5330.0,
              spatialReference = SpatialReference.wgs84()
          )
      
          val camera = Camera(
              locationPoint = cameraLocation,
              heading = 355.0,
              pitch = 72.0,
              roll = 0.0
          )
      
          return ArcGISScene(BasemapStyle.ArcGISImagery).apply {
      
              baseSurface = surface
      
              initialViewpoint = Viewpoint(cameraLocation, camera)
      
          }
      
      }

Create a MainScreen to hold the scene

1. In MainScreen.kt, create a composable function named MainScreen, which will call SceneView.

   MainScreen.kt

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   @Composable
   fun MainScreen() {
   
   }
   

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2. Add a remember block and call createScene() inside it. Assign remember to a local variable named scene.

   More info

   The top-level composable function remember is used to retain state across recompositions.

   MainScreen.kt

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   @Composable
   fun MainScreen() {
   
       val scene = remember {
           createScene()
       }
   
   }
   

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3. You will now call several composable functions from Android Jetpack Compose. Call Scaffold and pass a TopAppBar with a Text that contains the app name (R.string.app_name).

   MainScreen.kt

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   @Composable
   fun MainScreen() {
   
       val scene = remember {
           createScene()
       }
   
       Scaffold(
           topBar = { TopAppBar(title = { Text(text = stringResource(id = R.string.app_name)) }) }
       ) {
   
       }
   
   }
   

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4. In the trailing lambda for Scaffold, call the SceneView composable defined in the ArcGIS Maps SDK for Kotlin Toolkit. Pass a Modifier that has maximum size and default padding. And pass scene as the arcGISScene parameter

   MainScreen.kt

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   @Composable
   fun MainScreen() {
   
       val scene = remember {
           createScene()
       }
   
       Scaffold(
           topBar = { TopAppBar(title = { Text(text = stringResource(id = R.string.app_name)) }) }
       ) {
   
           SceneView(
               modifier = Modifier.fillMaxSize().padding(it),
               arcGISScene = scene
           )
   
       }
   
   }
   

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Call MainScreen inside MainActivity class

1. Open the app > kotlin+java > com.example.app > MainActivity.kt. Delete all lines of code except for the package declaration (the first line) and the MainActivity class definition.

   MainActivity.kt

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   package com.example.app
   
   class MainActivity : ComponentActivity() {
   
   }

2. Add import statements to MainActivity.kt.

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   package com.example.app
   
   import android.os.Bundle
   import androidx.activity.ComponentActivity
   import androidx.activity.compose.setContent
   import com.arcgismaps.ApiKey
   import com.arcgismaps.ArcGISEnvironment
   import com.example.app.screens.MainScreen
   import com.example.app.ui.theme.DisplayASceneTheme
   
   class MainActivity : ComponentActivity() {
   
   }

3. In the setContent block of the onCreate() lifecylce function, you will call the composable function MainScreen, with default theming applied. To do this, add onCreate() with the following code.

   MainActivity.kt

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   class MainActivity : ComponentActivity() {
   
       override fun onCreate(savedInstanceState: Bundle?) {
           super.onCreate(savedInstanceState)
   
           setContent {
               DisplayASceneTheme {
                   MainScreen()
               }
           }
       }
   
   }

Get an access token

You need an access token to use the location services used in this tutorial.

1. Go to the Create an API key tutorial to obtain an access token.

2. Ensure that the following privilege is enabled: Location services > Basemaps > Basemap styles service.

3. Copy the access token as it will be used in the next step.

To learn more about other ways to get an access token, go to Types of authentication.

Set an API Key

2. In the MainActivity class, create the setApiKey() method, where you set the ArcGISEnvironment.apiKey​ property by calling ApiKey.create() and passing your access token as a string. Don't forget the double quotes.

   MainActivity.kt

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   class MainActivity : ComponentActivity() {
   
       override fun onCreate(savedInstanceState: Bundle?) {
           super.onCreate(savedInstanceState)
   
           setContent {
               DisplayASceneTheme {
                   MainScreen()
               }
           }
       }
   
       private fun setApiKey() {
   
           ArcGISEnvironment.apiKey = ApiKey.create("YOUR_ACCESS_TOKEN")
   
       }
   
   }

3. Call setApiKey() in the onCreate() lifecycle method, before setContent {}.

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   class MainActivity : ComponentActivity() {
   
       override fun onCreate(savedInstanceState: Bundle?) {
           super.onCreate(savedInstanceState)
   
           setApiKey()
   
           setContent {
               DisplayASceneTheme {
                   MainScreen()
               }
           }
       }
   
       private fun setApiKey() {
   
           ArcGISEnvironment.apiKey = ApiKey.create("YOUR_ACCESS_TOKEN")
   
       }
   
   }

Run your app

1. Click Run > Run > app to run the app.

   More info

   In Android Studio, you have two choices for running your app: an actual Android device or the Android Emulator.

   Android device

   Connect your computer to your Android device, using USB or Wi-Fi. For more details, see How to connect your Android device.

   Android Emulator

   Create an AVD (Android Virtual Device) to run in the Android Emulator. For details, see Run apps on the Android Emulator.

   Selecting a device

   When you build and run an app in Android Studio, you must first select a device. From the Android Studio toolbar, you can access the drop-down list of your currently available devices, both virtual and physical.

   .

   If you cannot access the list on the toolbar, click Tools > Device Manager.

You should see a scene with the imagery basemap layer centered on the Santa Monica Mountains in California. Pinch, drag, and double-tap the scene view to explore the scene.

What's next?

Learn how to use additional API features, ArcGIS location services, and ArcGIS tools in these tutorials:

• Add a point, line, and polygon

• Add a feature layer

• Search for an address

• Find a route and directions