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Showing content from https://developers.arcgis.com/cesiumjs/scenes/change-the-basemap-layer/ below:

Tutorial: Change the base layer | CesiumJS

Learn how to customize the CesiumJS base layer picker to display ArcGIS data provider options.

Change the basemap layer using API key authentication Change the basemap layer using user authentication

ArcGIS provides base layers for both imagery and terrain that you can use in your CesiumJS applications. You can use map tiles from the basemap styles service to create an ImageryProvider, and you can use elevation data from the Elevation service to create a TerrainProvider.

In this tutorial, you customize the BaseLayerPicker widget to display the different ArcGIS base layers available for imagery and terrain.

Prerequisites

An ArcGIS Location Platform or ArcGIS Online account.

Steps Get the starter app

Select a type of authentication below and follow the steps to create a new application.

You can choose one of the following to create a new CodePen:

Option 1: Complete the Display a scene tutorial; or,
Option 2: Start from the Display a scene tutorial .

Go to the Display a scene tutorial and download the solution.
Unzip the folder and open it in a text editor of your choice, such as Visual Studio Code. The starter app includes the following:
- callback.html: This contains callback as part of the authentication process.
- index.html: This contains app logic and the OAuth 2.0 code necessary to perform the authentication.

Set up authentication

Create developer credentials in your portal for the type of authentication you selected.

Create a new API key credential with the correct privileges to access the resources used in this tutorial.

Go to the Create an API key tutorial and create an API key with the following privilege(s):
- Privileges
  - Location services > Basemaps
Copy the API key access token to your clipboard when prompted.

Create a new OAuth credential to register the application.

Go to the Create OAuth credentials for user authentication tutorial to create an OAuth credential.
Copy the Client ID and Redirect URL from your OAuth credentials item and paste them to a safe location. They will be used in a later step.

Note

To use this application, users must have an ArcGIS account with the necessary privileges to access all resources and services.

Set developer credentials

Use the API key or OAuth developer credentials created in the previous step in your application.

Add <script> elements in the HTML <body> and create an accessToken variable to store your access token. Set YOUR_ACCESS_TOKEN with the access token you previously copied from your API key credentials.

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  <script>

    /* Use for API key authentication */
    const accessToken = "YOUR_ACCESS_TOKEN";

  </script>

Set the defaultAccessToken included with Cesium to authenticate requests to the ArcGIS services used in this tutorial.

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  <script>

    /* Use for API key authentication */
    const accessToken = "YOUR_ACCESS_TOKEN";

    Cesium.ArcGisMapService.defaultAccessToken = accessToken;

  </script>

In both the index.html and callback.html files, set the properties of clientId and redirectUri with the client ID and redirect URL of your OAuth credentials.

index.html

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    /* Use for user authentication */
    const clientId = "YOUR_CLIENT_ID"; // Your client ID from OAuth credentials
    const redirectUri = "YOUR_REDIRECT_URI"; // The redirect URL registered in your OAuth credentials
    const session = await arcgisRest.ArcGISIdentityManager.beginOAuth2({
      clientId,
      redirectUri,
      portal: "https://www.arcgis.com/sharing/rest" // Your portal URL
    })

    const accessToken = session.token;

callback.html

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    arcgisRest.ArcGISIdentityManager.completeOAuth2({
      clientId: "YOUR_CLIENT_ID", // Your client ID from OAuth credentials
      redirectUri: "YOUR_REDIRECT_URI", // The redirect URL registered in your OAuth credentials
      portal: "https://www.arcgis.com/sharing/rest" // Your portal URL
    })

Run the app and ensure you can sign in successfully.

If you are unable to sign in, make sure you have the correct redirect URL and port. This URL varies based on your application and typically takes the format of https://<server>[:port]/callback.html or http://my-arcgis-app:/auth. For example, if you are running an application on http://127.0.0.1:5500/, set http://127.0.0.1:5500/callback.html as your redirect URL in the index.html and callback.html file and your developer credential. They all have to match!

Set the defaultAccessToken included with Cesium to authenticate requests to the ArcGIS services used in this tutorial.

index.html

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    Cesium.ArcGisMapService.defaultAccessToken = accessToken;

Get a Cesium ion access token

All Cesium applications must use an access token provided through Cesium ion. This token allows you to access assets such as Cesium World Terrain in your application.

Go to your Cesium ion dashboard to generate an access token. Copy the key to your clipboard.

Create a cesiumAccessToken variable and replace YOUR_CESIUM_ACCESS_TOKEN with the access token you copied from the Cesium ion dashboard.

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  <script>

    /* Use for API key authentication */
    const accessToken = "YOUR_ACCESS_TOKEN";

    // or

    /* Use for user authentication */
    // const session = await arcgisRest.ArcGISIdentityManager.beginOAuth2({
    //   clientId: "YOUR_CLIENT_ID", // Your client ID from OAuth credentials
    //   redirectUri: "YOUR_REDIRECT_URI", // The redirect URL registered in your OAuth credentials
    //   portal: "YOUR_PORTAL_URL" // Your portal URL
    // })

    // const accessToken = session.token;

    Cesium.ArcGisMapService.defaultAccessToken = accessToken;

    const cesiumAccessToken = "YOUR_CESIUM_ACCESS_TOKEN";

  </script>

Configure Cesium.Ion.defaultAccessToken with the Cesium access token to validate the application.

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  <script>

    /* Use for API key authentication */
    const accessToken = "YOUR_ACCESS_TOKEN";

    // or

    /* Use for user authentication */
    // const session = await arcgisRest.ArcGISIdentityManager.beginOAuth2({
    //   clientId: "YOUR_CLIENT_ID", // Your client ID from OAuth credentials
    //   redirectUri: "YOUR_REDIRECT_URI", // The redirect URL registered in your OAuth credentials
    //   portal: "YOUR_PORTAL_URL" // Your portal URL
    // })

    // const accessToken = session.token;

    Cesium.ArcGisMapService.defaultAccessToken = accessToken;

    const cesiumAccessToken = "YOUR_CESIUM_ACCESS_TOKEN";

    Cesium.Ion.defaultAccessToken = cesiumAccessToken;

  </script>

Update the camera position

Change the camera position to -122.4106, 37.7908, 200000 to focus on San Francisco.

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        viewer.camera.flyTo({
            destination: Cesium.Cartesian3.fromDegrees(-122.4106, 37.7908, 200000),
        });

Add a terrain provider

To create accurate and realistic terrain in your CesiumJS scene, you need to use a geoid service. This service will allow the elevation of your base layer to align with the elevation values of Cesium World Terrain.

Initialize a terrain provider called arcGisTerrain that references the Terrain 3D. This terrain will provide global elevation surface for your basemap layer.

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        const arcGisTerrain = new Cesium.ProviderViewModel({
            name: "ArcGIS World Terrain",
            iconUrl: "https://www.arcgis.com/sharing/rest/content/items/58a541efc59545e6b7137f961d7de883/info/thumbnail/thumbnail1585609861151.png",
            creationFunction: () => {
                return Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")
            }
        })
        viewModel.terrainProviderViewModels = [arcGisTerrain];

Add the data attribution for the elevation layer source.

Go to the Terrain 3D item.
Scroll down to the Credits (Attribution) section and copy its value.

Create an attribution property and paste the attribution value from the item.

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        const arcGisTerrain = new Cesium.ProviderViewModel({
            name: "ArcGIS World Terrain",
            iconUrl: "https://www.arcgis.com/sharing/rest/content/items/58a541efc59545e6b7137f961d7de883/info/thumbnail/thumbnail1585609861151.png",
            creationFunction: () => {
                return Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")
            }
        })
        viewModel.terrainProviderViewModels = [arcGisTerrain];

        // Attribution text retrieved from https://www.arcgis.com/home/item.html?id=7029fb60158543ad845c7e1527af11e4
        viewer.creditDisplay.addStaticCredit(new Cesium.Credit("Sources: Maxar, Airbus DS, USGS, NGA, NASA, CGIAR, GEBCO, N Robinson, NCEAS, NLS, OS, NMA, Geodatastyrelsen and the GIS User Community", false));

Mapping and location services guide

To learn how to get attribution from an item, go to Attribution.

Change the imagery providers

CesiumJS includes a baseLayerPicker by default that includes imagery layers from multiple providers. Customize this widget to include additional offerings from ArcGIS.

Inside viewer, set the baseLayerPicker property to true.

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

            baseLayer: Cesium.ImageryLayer.fromProviderAsync(arcGisImagery),

            terrain: Cesium.Terrain.fromWorldTerrain(),

            baseLayerPicker: true,

            timeline: false,
            animation: false,
            geocoder: false

        });

Access the baseLayerPicker.viewModel to manage the available base layer options.

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        const viewModel = viewer.baseLayerPicker.viewModel;

Define a set of base layers you want to include in your base layer picker, e.g. ArcGIS World Imagery, ArcGIS World Hillshade, and Esri World Ocean.

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        const imageryProviderNames = ["ArcGIS World Imagery", "ArcGIS World Hillshade", "Esri World Ocean"];

The viewModel.imageryProviderViewModels contains all available basemaps by default. Use a for loop to filter and select only the desired basemaps.

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        const imageryProviderNames = ["ArcGIS World Imagery", "ArcGIS World Hillshade", "Esri World Ocean"];

        const imageryProviders = [];

        for (imageryProvider of viewModel.imageryProviderViewModels) {
            if (imageryProviderNames.includes(imageryProvider.name)) {
                imageryProviders.push(imageryProvider);
            }
        }

Replace the viewModel.imageryProviderViewModels with the filtered list.

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        const imageryProviderNames = ["ArcGIS World Imagery", "ArcGIS World Hillshade", "Esri World Ocean"];

        const imageryProviders = [];

        for (imageryProvider of viewModel.imageryProviderViewModels) {
            if (imageryProviderNames.includes(imageryProvider.name)) {
                imageryProviders.push(imageryProvider);
            }
        }

        viewModel.imageryProviderViewModels = imageryProviders;

Run the app

Run the app.

Open the base layer picker and ensure that only the specified basemaps are available for selection.

What's next?

Learn how to use additional ArcGIS Location Services in these tutorials:

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