Change language labels for basemap styles

Learn how to change language labels for basemap styles.

Change language labels for basemap styles using API key authentication

The basemap styles service provides a number of different styles that you can use in your MapLibre GL JS applications. Each style accepts a language parameter, which allows you to localize place labels. There are currently over 30 different languages available.

In this tutorial, you use a <select> dropdown menu to toggle between a number of different place label languages.

Prerequisites

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 map tutorial; or,
  • Option 2: Start from the Display a map tutorial .

Set up authentication

Create in your for the type of authentication you selected.

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

  1. Go to the Create an API key tutorial and create an with the following :
    • Privileges
      • Location services > Basemaps
  2. Copy the API key access token to your clipboard when prompted.

Set developer credentials

Use the API key or OAuth so your application can access .

  1. Update the accessToken variable to use your API key.

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

  1. Remove the basemapId, basemapURL, and the olms function.

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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: "https://www.arcgis.com/sharing/rest" // Your portal URL
        // })
    
        // const accessToken = session.token;
    
        const map = new ol.Map({ target: "map" });
    
        map.setView(
          new ol.View({
            center: ol.proj.fromLonLat([-118.805, 34.027]),
            zoom: 12
          })
        );
    
        const basemapId = "arcgis/outdoor";
    
        const basemapURL = `https://basemapstyles-api.arcgis.com/arcgis/rest/services/styles/v2/styles/${basemapId}?token=${accessToken}`;
    
        olms.apply(map, basemapURL)
    
          .then(() => {
            // Add Esri attribution
            // Learn more in https://esriurl.com/attribution
            const source = map.getLayers().item(0).getSource();
            source.setAttributions("Powered by <a href='https://www.esri.com/en-us/home' target='_blank'>Esri</a> | ")
    
          });
    
      </script>
    
    Expand

Add a language selector

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

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

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      <style>
        html,
        body,
        #map {
          padding: 0;
          margin: 0;
          height: 100%;
          width: 100%;
          font-family: Arial, Helvetica, sans-serif;
          font-size: 14px;
          color: #323232;
        }
    
    
        #languages-wrapper {
          position: absolute;
          top: 20px;
          right: 20px;
        }
    
        #languages {
          font-size: 16px;
          padding: 4px 8px;
        }
    
    
      </style>
    
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  2. In the <body> element, add the wrapper tag with an id of languages-wrapper.

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    <body>
      <div id="map"></div>
    
      <div id="languages-wrapper">
    
      </div>
    
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  3. In the wrapper element, add a <select> element that contains an enumeration for each language available through the basemap styles service.

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      <div id="languages-wrapper">
    
        <select id="languages">
          <option value="global">Global</option>
          <option value="ar">Arabic</option>
          <option value="bs">Bosnian</option>
          <option value="bg">Bulgarian</option>
          <option value="ca">Catalan</option>
          <option value="zh-CN">Chinese (Simplified)</option>
          <option value="zh-HK">Chinese (Hong Kong)</option>
          <option value="zh-TW">Chinese (Taiwan)</option>
          <option value="hr">Croatian</option>
          <option value="cs">Czech</option>
          <option value="da">Danish</option>
          <option value="nl">Dutch</option>
          <option value="en">English</option>
          <option value="et">Estonian</option>
          <option value="fi">Finnish</option>
          <option value="fr">French</option>
          <option value="de">German</option>
          <option value="el">Greek</option>
          <option value="he">Hebrew</option>
          <option value="hu">Hungarian</option>
          <option value="id">Indonesian</option>
          <option value="it">Italian</option>
          <option value="ja">Japanese</option>
          <option value="ko">Korean</option>
          <option value="lv">Latvian</option>
          <option value="lt">Lithuanian</option>
          <option value="nb">Norwegian</option>
          <option value="pl">Polish</option>
          <option value="pt-BR">Portugese (Brazil)</option>
          <option value="pt-PT">Portugese (Portugal)</option>
          <option value="ro">Romanian</option>
          <option value="ru">Russian</option>
          <option value="sr">Serbian</option>
          <option value="sk">Slovak</option>
          <option value="sl">Slovenian</option>
          <option value="es">Spanish</option>
          <option value="sv">Swedish</option>
          <option value="th">Thai</option>
          <option value="tr">Turkish</option>
          <option value="uk" selected>Ukrainian</option>
          <option value="vi">Vietnamese</option>
        </select>
    
      </div>
    
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Set the initial language

When the page loads, initialize the app to initially display in Ukrainian.

  1. Create a function called url that creates the URL for a basemap style.

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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;
    
        const map = new ol.Map({ target: "map" });
        map.setView(
          new ol.View({
            center: ol.proj.fromLonLat([48.8790, 35.7088]),
            zoom: 3
          })
        );
    
        const baseUrl = "https://basemapstyles-api.arcgis.com/arcgis/rest/services/styles/v2/styles";
        const url = (language) => `${baseUrl}/arcgis/outdoor?token=${accessToken}&language=${language}`;
    
    Expand
  2. Create a function called setLanguage that will clear existing basemap layers and use olms to instantiate a basemap layer in the new language.

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        const baseUrl = "https://basemapstyles-api.arcgis.com/arcgis/rest/services/styles/v2/styles";
        const url = (language) => `${baseUrl}/arcgis/outdoor?token=${accessToken}&language=${language}`;
    
        const setLanguage = (language) => {
          // Clear out existing layers.
          map.setLayerGroup(new ol.layer.Group());
    
          // Instantiate the given basemap layer.
          olms.apply(map, url(language))
            .then(() => {
            // Add Esri attribution
            // Learn more in https://esriurl.com/attribution
              const source = map.getLayers().item(0).getSource();
              source.setAttributions("Powered by <a href='https://www.esri.com/en-us/home' target='_blank'>Esri</a> | ")
    
          });
        };
    
    Expand
  3. Call setLanguage to initialize the basemap layer to the Ukrainian (uk) enumeration.

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        const setLanguage = (language) => {
          // Clear out existing layers.
          map.setLayerGroup(new ol.layer.Group());
    
          // Instantiate the given basemap layer.
          olms.apply(map, url(language))
            .then(() => {
            // Add Esri attribution
            // Learn more in https://esriurl.com/attribution
              const source = map.getLayers().item(0).getSource();
              source.setAttributions("Powered by <a href='https://www.esri.com/en-us/home' target='_blank'>Esri</a> | ")
    
          });
        };
    
        setLanguage("uk");
    
    Expand

Add an event listener

Call setLanguage when the user selects an option in the <select> menu.

  1. Access the <select> element using its id.

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        setLanguage("uk");
    
        const basemapsSelectElement = document.querySelector("#languages");
    
    Expand
  2. Add an event listener that calls setLanguage when the <select> element is changed.

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        const basemapsSelectElement = document.querySelector("#languages");
    
        basemapsSelectElement.addEventListener("change", (e) => {
          setLanguage(e.target.value);
        });
    
    Expand

Run the app

Run the app.

Use the layer switcher menu at the top right to select and explore different basemap layer styles.

What's Next?

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

Your browser is no longer supported. Please upgrade your browser for the best experience. See our browser deprecation post for more details.

You can no longer sign into this site. Go to your ArcGIS portal or the ArcGIS Location Platform dashboard to perform management tasks.

Your ArcGIS portal

Create, manage, and access API keys and OAuth 2.0 developer credentials, hosted layers, and data services.

Your ArcGIS Location Platform dashboard

Manage billing, monitor service usage, and access additional resources.

Learn more about these changes in the What's new in Esri Developers June 2024 blog post.

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