How to access data services

CesiumJS applications can access data services hosted in a portal. You can access data services to display features, map tiles, or 3D objects such as buildings. Supported data types include features, I3S data, and map tiles.

All data stored in ArcGIS is managed and accessed as a data service. You can create a data service by uploading your own data to ArcGIS. Data services are managed through an item and can be accessed in your application by referencing their service URL.

Feature data

If you have features containing geometry and attributes, you can import the data to create an ArcGIS feature layer in a feature service. To access the data, you can use the URL of the service to query and return features. You can style and display the results in a map or scene. Feature layers can also contain styling information as part of the service response.

How to access a feature service

To display features from a feature service in CesiumJS, you need to use ArcGIS REST JS to query the features and return results as GeoJSON. Once you have the GeoJSON response, use a Cesium GeoJsonDataSource to add and style the feature data.

Create a new feature service in your portal or select an existing one. You can create a feature service by uploading a CSV, XLS, GeoJSON, or shapefile.
In your CesiumJS application, add references to the ArcGIS REST JS request and feature-service packages.
Create an authentication object with ArcGIS REST JS using your ArcGIS access token. If the feature service is private, ensure that your access token is properly scoped to access the features.
Use arcgisRest.queryFeatures to request features from the feature service. Set the url parameter to the URL of the feature service, and include f:"geojson" to return results as GeoJSON.
Create a new Cesium.GeoJsonDataSource from the ArcGIS REST JS response.
Add the GeoJSON data source to your scene using dataSources.add.

Example

Add a trailhead (points) layer

This example queries the Santa Monica Trailheads (points) feature layer and adds the results to the scene as a GeoJsonDataSource.

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<div id="cesiumContainer"></div>
<script>
   const viewer = new Cesium.Viewer("cesiumContainer", {
        imageryProvider: arcGISImageTileProvider,
   });

   const pointLayerURL = "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/Trailheads/FeatureServer/0";

   arcgisRest.queryFeatures({
      url: pointLayerURL,
      authentication,
      f:"geojson"
   }).then((response) => {
      const data = Cesium.GeoJsonDataSource.load(response,{
            clampToGround:true
      })
      viewer.dataSources.add(data);
   })
</script>

Scene data

A scene service contains 3D scene data stored in the Indexed 3D Scene Layer (I3S) format, an OGC standard. Cesium currently supports the following types of I3S layers:

How to access a scene service

To display scene data in CesiumJS, add an I3SDataProvider to your app that references the URL of the scene service.

Create a scene service in ArcGIS by uploading a scene layer package, or find an existing scene layer from ArcGIS Living Atlas.
In your CesiumJS application, create a new I3SDataProvider. Set the url to the URL of the scene service.
If your layer has gravity-related heights, set the geoidTiledTerrainProvider parameter of the I3SDataProvider to an Earth Gravitational Model.
Add the I3S data provider to your scene using scene.primitives.add.

Example

Add a 3D object layer of San Francisco

This example displays a 3D object layer containing textured building models of San Francisco. It uses the Earth Gravitational Model EGM2008 to align buildings with terrain.

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  <div id="cesiumContainer"></div>
  <script type="module">

    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, {
      enablePickFeatures:false
    });

    const viewer = new Cesium.Viewer("cesiumContainer", {

        baseLayer: Cesium.ImageryLayer.fromProviderAsync(arcGisImagery),

    });

    // 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);

  </script>

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Map tiles

You can add an ArcGIS map tile layer to a CesiumJS application to visualize your data. Map tiles can be accessed through the ArcGISMapServerImageryProvider class.

How to access a map tile service

In ArcGIS, create a map tile service by publishing one from an existing feature layer, or by importing a tile package.
In your CesiumJS application, create a Viewer or CesiumWidget.
Create a new ArcGISMapServerImageryProvider and set the url to the URL of the map tile service. Set the token parameter to your ArcGIS access token.
Display the map tiles in your scene by adding the provider to the viewer's ImageryLayerCollection.

Example

Add map tiles

This example shows how to add a custom map tile layer hosted in a portal to your CesiumJS application.

Use dark colors for code blocks
    <div id="cesiumContainer"></div>
    <script>

      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, {
        enablePickFeatures:false
      });

      const viewer = new Cesium.Viewer("cesiumContainer", {

          baseLayer: Cesium.ImageryLayer.fromProviderAsync(arcGisImagery),

      });

      const santaMonicaParcels = Cesium.ArcGisMapServerImageryProvider.fromUrl("https://tiles.arcgis.com/tiles/P3ePLMYs2RVChkJx/arcgis/rest/services/WV03_Kilauea_20180519_ShortwaveInfrared/MapServer", {
        token:accessToken
      });
      viewer.scene.imageryLayers.add(
        Cesium.ImageryLayer.fromProviderAsync(santaMonicaParcels)
      );

    </script>
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