Tutorial: Change language labels for static basemap tiles

Learn how to change language labels for static basemap tiles service.

The static basemap tiles service provides access to raster basemap tiles for the world. The service supports a number of ArcGIS styles such as navigation, streets, outdoor, and light-gray. The tiles are returned as PNG files.

In this tutorial, you use the dropdown menu to toggle between different languages for the static basemap tiles.

Prerequisites

Steps

Get the starter app

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

Set up authentication

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

Set developer credentials

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

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.

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

2. 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>
   

3. 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>
   

Add a language selector

Add a menu that allows users to change the display language of your map. CesiumJS does not have a built-in selector widget, so you will create an HTML <select> element.

1. In the <body> element, add a select element that contains an enumeration for each language available through the static basemap tiles service.

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   <body>
     <div id="cesiumContainer"></div>
   
     <div id="language-wrapper">
       <select id="language">
         <option value="fr">French</option>
         <option value="en">English</option>
         <option value="nl">Dutch</option>
         <option value="da">Danish</option>
         <option value="fi">Finnish</option>
         <option value="de">German</option>
         <option value="nb">Norwegian</option>
       </select>
     </div>
   
   </body>
   

2. In the <head> tag, add CSS that will position the <select> menu element and its wrapper in the upper right corner and provide styling.

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     <style>
       html,
       body,
       #cesiumContainer {
         margin: 0;
         padding: 0;
         width: 100%;
         height: 100%;
       }
   
   
       #language-wrapper {
         position: absolute;
         top: 20px;
         left: 20px;
         background: rgba(255, 255, 255, 0);
       }
   
       #language {
         font-size: 16px;
         padding: 4px 8px;
       }
   
   
     </style>
   

Update the camera's viewpoint

1. Change the camera's destination to 8.20, 46.90, 300000. This will focus the camera on Switzerland.

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       viewer.camera.setView({
   
         destination: Cesium.Cartesian3.fromDegrees(8.20, 46.90, 300000),
   
         orientation: {
           heading: Cesium.Math.toRadians(0.0),
           pitch: Cesium.Math.toRadians(-90.0),
         }
       });
   

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Remove base layer references

1. Remove arcGisImagery, terrain, and the baseLayer properties from the viewer.
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       const arcGisImagery = Cesium.ArcGisMapServerImageryProvider.fromBasemapType(Cesium.ArcGisBaseMapType.SATELLITE);
   
       const viewer = new Cesium.Viewer("cesiumContainer", {
   
         baseLayer: Cesium.ImageryLayer.fromProviderAsync(arcGisImagery),
   
         terrain: Cesium.Terrain.fromWorldTerrain(),
   
         timeline: false,
         animation: false,
         geocoder: false
   
       });
   

Set the basemap

When the scene loads, initialize the app to display the static basemap tiles in French.

1. Create a constant variable called basemapEnum to define the default basemap style and set the value to arcgis/outdoor.

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       const basemapEnum = 'arcgis/outdoor';
   
   

2. Create a function called url that takes a language as a parameter. This will create the URL of the static basemap tiles for that specified language.

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       const basemapEnum = 'arcgis/outdoor';
   
       const baseUrl = `https://static-map-tiles-api.arcgis.com/arcgis/rest/services/static-basemap-tiles-service/v1/${basemapEnum}/static`
       const url = (language) => `${baseUrl}/tile/{z}/{y}/{x}?token=${accessToken}&language=${language}`;
   
   

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3. Create a defaultLanguage variable for the basemap, which is fr for French.

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       const basemapEnum = 'arcgis/outdoor';
   
       const baseUrl = `https://static-map-tiles-api.arcgis.com/arcgis/rest/services/static-basemap-tiles-service/v1/${basemapEnum}/static`
       const url = (language) => `${baseUrl}/tile/{z}/{y}/{x}?token=${accessToken}&language=${language}`;
   
       const defaultLanguage = "fr";
   

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4. Fetch the service URL to retrieve the basemap JSON. Then, create an UrlTemplateImageryProvider object from the JSON.

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       fetch(`${baseUrl}?token=${accessToken}`)
         .then(response => response.json())
         .then(data => {
   
           const imageryProvider = new Cesium.UrlTemplateImageryProvider({
             url: url(defaultLanguage),
             tileHeight: 512,
   
           });
   
         });
   

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5. Create a basemapCredit and instantiate a Credit object from the copyrightText string of the JSON. CesiumJS does not provide attribution automatically for static basemap tiles service. Therefore, you are required to add this attribution manually.

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       let basemapCredit;
   
       fetch(`${baseUrl}?token=${accessToken}`)
         .then(response => response.json())
         .then(data => {
   
           basemapCredit = data.copyrightText
   
           const imageryProvider = new Cesium.UrlTemplateImageryProvider({
             url: url(defaultLanguage),
             tileHeight: 512,
   
             credit: basemapCredit
   
           });
   
         });
   

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6. Add the imageryProvider to the viewer.

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       fetch(`${baseUrl}?token=${accessToken}`)
         .then(response => response.json())
         .then(data => {
   
           basemapCredit = data.copyrightText
   
           const imageryProvider = new Cesium.UrlTemplateImageryProvider({
             url: url(defaultLanguage),
             tileHeight: 512,
   
             credit: basemapCredit
   
           });
   
           viewer.imageryLayers.addImageryProvider(imageryProvider);
   
         });
   

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7. Run the code to ensure the map displays the default static basemap tiles in French and that the <select> element contains different language enumerations.

Add an event listener

Use an event listener to register a language change in the <select> element and to update the scene.

1. Add an event listener for the #language select element.

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       document.querySelector("#language").addEventListener("change", (e) => {
   
       });
   

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2. Create a new UrlTemplateImageryProvider using the selected language.

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       document.querySelector("#language").addEventListener("change", (e) => {
   
         const newImageryProvider = new Cesium.UrlTemplateImageryProvider({
           url: url(e.target.value),
           tileWidth: 512,
           tileHeight: 512,
           credit: basemapCredit
         });
   
       });
   

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3. Update the viewer with the new language.

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       document.querySelector("#language").addEventListener("change", (e) => {
   
         const newImageryProvider = new Cesium.UrlTemplateImageryProvider({
           url: url(e.target.value),
           tileWidth: 512,
           tileHeight: 512,
           credit: basemapCredit
         });
   
         viewer.imageryLayers.removeAll();
         viewer.imageryLayers.addImageryProvider(newImageryProvider);
   
       });
   

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Run the app

Run the app.

The map should be displayed in French and you should be able to use the controls to switch between language labels.

What's next?

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