Tutorial: Add 3D objects

Learn how to display I3S 3D objects in a scene.

3D objects are a type of I3S data that are used to model entities such as buildings. They are typically stored in a hosted ArcGIS scene service. 3D objects are part of the I3S OGC community standard.

This tutorial explains how to add 3D objects from a scene service to your CesiumJS application using the I3SDataProvider class.

The 3D objects you will use are hosted in the San Francisco 3D Objects layer.

Prerequisites

Steps

Create a new pen

1. To get started, either complete the Display a scene tutorial or use this pen.

Get an access token

You need an access token with the correct privileges to access the resources used in this tutorial.

1. Go to the Create an API key tutorial and create an API key with the following privilege(s):
   

   • Privileges
     • Location services > Basemaps
   • Item access
     • Note: If you are using your own custom data layer for this tutorial, you need to grant the API key credentials access to the layer item. Learn more in Item access privileges.

2. Copy the API key access token to your clipboard when prompted.

3. In CodePen, update the accessToken variable to use your access token.

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         const accessToken = "YOUR_ACCESS_TOKEN";
   
         Cesium.ArcGisMapService.defaultAccessToken = accessToken;
   
         const cesiumAccessToken = "YOUR_CESIUM_ACCESS_TOKEN";
   
         Cesium.Ion.defaultAccessToken = cesiumAccessToken;
   
         const arcGisImagery = Cesium.ArcGisMapServerImageryProvider.fromBasemapType(Cesium.ArcGisBaseMapType.SATELLITE);
   
         const viewer = new Cesium.Viewer("cesiumContainer", {
   
           baseLayer: Cesium.ImageryLayer.fromProviderAsync(arcGisImagery),
   
         });
   

To learn about the other types of authentication available, go to Types of authentication.

Update the camera position

1. This tutorial uses a 3D object layer centered on the city of San Francisco. Update the camera to focus on the coordinates [-122.433, 37.777] with a height of 500.

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       const arcGisImagery = Cesium.ArcGisMapServerImageryProvider.fromBasemapType(Cesium.ArcGisBaseMapType.SATELLITE, {
         enablePickFeatures:false
       });
   
       const viewer = new Cesium.Viewer("cesiumContainer", {
   
           baseLayer: Cesium.ImageryLayer.fromProviderAsync(arcGisImagery),
   
           terrain: Cesium.Terrain.fromWorldTerrain(),
           timeline: false,
           animation: false,
           geocoder:false
   
       });
   
       viewer.camera.setView({
         destination: Cesium.Cartesian3.fromDegrees(-122.433,37.777,500),
         orientation: {
           heading: Cesium.Math.toRadians(60),
           pitch: Cesium.Math.toRadians(-15.0),
         }
       });
   
   

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Add a terrain provider

To ensure that your 3D objects sit properly on top of the terrain, you need to use a geoid service. This service will allow the elevation of the 3D objects to align with the elevation values of Cesium World Terrain.

1. Initialize a terrain provider called geoidService that references the Earth Gravitational Model EGM2008. This provider will allow for geoid conversion between the gravity-based 3D object layer and the ellipsoidal-based Cesium World Terrain.

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       viewer.camera.setView({
         destination: Cesium.Cartesian3.fromDegrees(-122.433,37.777,500),
         orientation: {
           heading: Cesium.Math.toRadians(60),
           pitch: Cesium.Math.toRadians(-15.0),
         }
       });
   
       // The source data used in this transcoding service was compiled from https://earth-info.nga.mil/#tab_wgs84-data and is based on EGM2008 Gravity Model
       const geoidService = await Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://tiles.arcgis.com/tiles/GVgbJbqm8hXASVYi/arcgis/rest/services/EGM2008/ImageServer");
   
       const i3sProvider = await Cesium.I3SDataProvider.fromUrl(i3sLayer, {
           geoidTiledTerrainProvider: geoidService,
           token: accessToken
       })
   
   

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Add 3D objects

1. Reference the service URL of the San Francisco 3D Objects scene layer.

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       viewer.camera.setView({
         destination: Cesium.Cartesian3.fromDegrees(-122.433,37.777,500),
         orientation: {
           heading: Cesium.Math.toRadians(60),
           pitch: Cesium.Math.toRadians(-15.0),
         }
       });
   
       // The source data used in this transcoding service was compiled from https://earth-info.nga.mil/#tab_wgs84-data and is based on EGM2008 Gravity Model
       const geoidService = await Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://tiles.arcgis.com/tiles/GVgbJbqm8hXASVYi/arcgis/rest/services/EGM2008/ImageServer");
   
       const i3sLayer = "https://tiles.arcgis.com/tiles/z2tnIkrLQ2BRzr6P/arcgis/rest/services/SanFrancisco_Bldgs/SceneServer";
   
   

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2. Create an I3SDataProvider by calling the fromUrl method. Pass the geoidService you created as well as your access token to provide authentication.

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       viewer.camera.setView({
         destination: Cesium.Cartesian3.fromDegrees(-122.433,37.777,500),
         orientation: {
           heading: Cesium.Math.toRadians(60),
           pitch: Cesium.Math.toRadians(-15.0),
         }
       });
   
       // The source data used in this transcoding service was compiled from https://earth-info.nga.mil/#tab_wgs84-data and is based on EGM2008 Gravity Model
       const geoidService = await Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://tiles.arcgis.com/tiles/GVgbJbqm8hXASVYi/arcgis/rest/services/EGM2008/ImageServer");
   
       const i3sLayer = "https://tiles.arcgis.com/tiles/z2tnIkrLQ2BRzr6P/arcgis/rest/services/SanFrancisco_Bldgs/SceneServer";
   
       const i3sProvider = await Cesium.I3SDataProvider.fromUrl(i3sLayer, {
           geoidTiledTerrainProvider: geoidService,
           token: accessToken
       })
   
   

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3. Add the I3S provider to your viewer as a Primitive.

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       // The source data used in this transcoding service was compiled from https://earth-info.nga.mil/#tab_wgs84-data and is based on EGM2008 Gravity Model
       const geoidService = await Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://tiles.arcgis.com/tiles/GVgbJbqm8hXASVYi/arcgis/rest/services/EGM2008/ImageServer");
   
       const i3sLayer = "https://tiles.arcgis.com/tiles/z2tnIkrLQ2BRzr6P/arcgis/rest/services/SanFrancisco_Bldgs/SceneServer";
   
       const i3sProvider = await Cesium.I3SDataProvider.fromUrl(i3sLayer, {
           geoidTiledTerrainProvider: geoidService,
           token: accessToken
       })
   
       viewer.scene.primitives.add(i3sProvider);
   

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Run the app

In CodePen, run your code to display the map. The map should display the city of San Francisco with 3D objects.

What's next?

Learn how to use additional ArcGIS location services in these tutorials: