Query demographic data

Learn how to query demographic information for locations around the world with the GeoEnrichment service.

The GeoEnrichment service provides information such as population and household size about geographic areas that you define. The enrich method provides the ability to get facts about a location or area. Using Enrich, you can get information about the people, places, and businesses in a specific area or within a certain distance of a point.

In this tutorial, you use ArcGIS REST JS to access the GeoEnrichment service to search for demographic data within one mile of a clicked point and display the data in a overlay panel.

Prerequisites

You need a free ArcGIS developer account to access your dashboard and API keys. The API key must be scoped to access the services used in this tutorial.

Steps

Create a new pen

  1. To get started, either complete the Display a map tutorial or .

Set the API key

To access ArcGIS location services, you need an API key.

  1. Go to your dashboard to get an API key.

  2. In CodePen, update apiKey to use your key.

    Change line
              
    //
    
    const apiKey = "YOUR-API-KEY";
    const basemapEnum = "ArcGIS:Streets";
    const map = new mapboxgl.Map({
      container: "map", // the id of the div element
      style: `https://basemaps-api.arcgis.com/arcgis/rest/services/styles/${basemapEnum}?type=style&apiKey=${apiKey}`,
      zoom: 12, // starting zoom
      center: [-118.805, 34.027] // starting location [longitude, latitude]
    });
    

Add references to ArcGIS REST JS

  1. Add links to the ArcGIS REST JS libraries in the <script> section.

    Add line.Add line.Add line.
                                                                                              
    <!DOCTYPE html>
    <html>
    
      <head>
        <meta charset="utf-8" />
        <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
        <script src="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js"></script>
        <link href="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.css" rel="stylesheet" />
    
        <script src="https://unpkg.com/@esri/arcgis-rest-request@3.0.0/dist/umd/request.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-auth@3.0.0/dist/umd/auth.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-demographics@3.0.0/dist/umd/demographics.umd.js"></script>
    
        <style>
          html,
          body,
          #map {
            padding: 0;
            margin: 0;
            height: 100%;
            width: 100%;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 14px;
            color: #323232;
          }
        </style>
      </head>
    
      <body>
        <div id="map"></div>
    
        <script>
    
          const apiKey = "YOUR-API-KEY";
          const basemapEnum = "ArcGIS:Streets";
    
          const map = new mapboxgl.Map({
            container: "map", // the id of the div element
            style: `https://basemaps-api.arcgis.com/arcgis/rest/services/styles/${basemapEnum}?type=style&apiKey=${apiKey}`,
    
            zoom: 5, // starting zoom
            center: [18.88, 47.33] // starting location [longitude, latitude]
    
          });
    
          const authentication = new arcgisRest.ApiKey({
             key: apiKey
           });
    
          map.getCanvas().style.cursor = "crosshair";
    
          map.on("click", async (e) => {
            // e.lngLat contains the clicked location
    
            const response = await arcgisRest.queryDemographicData({
              studyAreas: [
                {
                  geometry: {
                    x: e.lngLat.lng,
                    y: e.lngLat.lat
                  }
                }
              ],
              authentication: authentication
            });
    
            let message;
            const featureSet = response.results[0].value.FeatureSet;
            if (featureSet.length > 0 && featureSet[0].features.length > 0) {
              const attributes = featureSet[0].features[0].attributes;
              message =
                `<b>Data for a 1 mile search radius</b>` +
                [
                  `Population: ${attributes.TOTPOP.toLocaleString()}`,
                  `Males: ${attributes.TOTMALES.toLocaleString()}`,
                  `Females: ${attributes.TOTFEMALES.toLocaleString()}`,
                  `Average household size: ${attributes.AVGHHSZ}`
                ].join("<br>");
    
            } else {
              message = "Data not available for this location.";
            }
    
            const popup = new mapboxgl.Popup().setHTML(message).setLngLat(e.lngLat).addTo(map);
    
          });
    
        </script>
      </body>
    </html>

Update the map position

The GeoEnrichment service has data sources for many countries around the world, including most of Europe. Change the position of the map to center on eastern Europe.

  1. Update the center parameter to [18.88, 47.33] and set zoom to 5.

    Change lineChange line
                                                                                              
    <!DOCTYPE html>
    <html>
    
      <head>
        <meta charset="utf-8" />
        <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
        <script src="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js"></script>
        <link href="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.css" rel="stylesheet" />
    
        <script src="https://unpkg.com/@esri/arcgis-rest-request@3.0.0/dist/umd/request.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-auth@3.0.0/dist/umd/auth.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-demographics@3.0.0/dist/umd/demographics.umd.js"></script>
    
        <style>
          html,
          body,
          #map {
            padding: 0;
            margin: 0;
            height: 100%;
            width: 100%;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 14px;
            color: #323232;
          }
        </style>
      </head>
    
      <body>
        <div id="map"></div>
    
        <script>
    
          const apiKey = "YOUR-API-KEY";
          const basemapEnum = "ArcGIS:Streets";
    
          const map = new mapboxgl.Map({
            container: "map", // the id of the div element
            style: `https://basemaps-api.arcgis.com/arcgis/rest/services/styles/${basemapEnum}?type=style&apiKey=${apiKey}`,
    
            zoom: 5, // starting zoom
            center: [18.88, 47.33] // starting location [longitude, latitude]
    
          });
    
          const authentication = new arcgisRest.ApiKey({
             key: apiKey
           });
    
          map.getCanvas().style.cursor = "crosshair";
    
          map.on("click", async (e) => {
            // e.lngLat contains the clicked location
    
            const response = await arcgisRest.queryDemographicData({
              studyAreas: [
                {
                  geometry: {
                    x: e.lngLat.lng,
                    y: e.lngLat.lat
                  }
                }
              ],
              authentication: authentication
            });
    
            let message;
            const featureSet = response.results[0].value.FeatureSet;
            if (featureSet.length > 0 && featureSet[0].features.length > 0) {
              const attributes = featureSet[0].features[0].attributes;
              message =
                `<b>Data for a 1 mile search radius</b>` +
                [
                  `Population: ${attributes.TOTPOP.toLocaleString()}`,
                  `Males: ${attributes.TOTMALES.toLocaleString()}`,
                  `Females: ${attributes.TOTFEMALES.toLocaleString()}`,
                  `Average household size: ${attributes.AVGHHSZ}`
                ].join("<br>");
    
            } else {
              message = "Data not available for this location.";
            }
    
            const popup = new mapboxgl.Popup().setHTML(message).setLngLat(e.lngLat).addTo(map);
    
          });
    
        </script>
      </body>
    </html>

Add a click event handler

You need a location before calling the GeoEnrichment service. To get a location, you can add a handler to the Map's click event. The click handler will be called with an object containing a LngLat.

You can change the mouse cursor to a crosshair to make it easier to click precisely. Use map.getCanvas to get the canvas, then modify its style property.

  1. After the map initialization code, set the mouse cursor style to crosshair.

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    <!DOCTYPE html>
    <html>
    
      <head>
        <meta charset="utf-8" />
        <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
        <script src="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js"></script>
        <link href="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.css" rel="stylesheet" />
    
        <script src="https://unpkg.com/@esri/arcgis-rest-request@3.0.0/dist/umd/request.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-auth@3.0.0/dist/umd/auth.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-demographics@3.0.0/dist/umd/demographics.umd.js"></script>
    
        <style>
          html,
          body,
          #map {
            padding: 0;
            margin: 0;
            height: 100%;
            width: 100%;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 14px;
            color: #323232;
          }
        </style>
      </head>
    
      <body>
        <div id="map"></div>
    
        <script>
    
          const apiKey = "YOUR-API-KEY";
          const basemapEnum = "ArcGIS:Streets";
    
          const map = new mapboxgl.Map({
            container: "map", // the id of the div element
            style: `https://basemaps-api.arcgis.com/arcgis/rest/services/styles/${basemapEnum}?type=style&apiKey=${apiKey}`,
    
            zoom: 5, // starting zoom
            center: [18.88, 47.33] // starting location [longitude, latitude]
    
          });
    
          const authentication = new arcgisRest.ApiKey({
             key: apiKey
           });
    
          map.getCanvas().style.cursor = "crosshair";
    
          map.on("click", async (e) => {
            // e.lngLat contains the clicked location
    
            const response = await arcgisRest.queryDemographicData({
              studyAreas: [
                {
                  geometry: {
                    x: e.lngLat.lng,
                    y: e.lngLat.lat
                  }
                }
              ],
              authentication: authentication
            });
    
            let message;
            const featureSet = response.results[0].value.FeatureSet;
            if (featureSet.length > 0 && featureSet[0].features.length > 0) {
              const attributes = featureSet[0].features[0].attributes;
              message =
                `<b>Data for a 1 mile search radius</b>` +
                [
                  `Population: ${attributes.TOTPOP.toLocaleString()}`,
                  `Males: ${attributes.TOTMALES.toLocaleString()}`,
                  `Females: ${attributes.TOTFEMALES.toLocaleString()}`,
                  `Average household size: ${attributes.AVGHHSZ}`
                ].join("<br>");
    
            } else {
              message = "Data not available for this location.";
            }
    
            const popup = new mapboxgl.Popup().setHTML(message).setLngLat(e.lngLat).addTo(map);
    
          });
    
        </script>
      </body>
    </html>
  2. Add an async handler for the click event.

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    <!DOCTYPE html>
    <html>
    
      <head>
        <meta charset="utf-8" />
        <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
        <script src="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js"></script>
        <link href="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.css" rel="stylesheet" />
    
        <script src="https://unpkg.com/@esri/arcgis-rest-request@3.0.0/dist/umd/request.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-auth@3.0.0/dist/umd/auth.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-demographics@3.0.0/dist/umd/demographics.umd.js"></script>
    
        <style>
          html,
          body,
          #map {
            padding: 0;
            margin: 0;
            height: 100%;
            width: 100%;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 14px;
            color: #323232;
          }
        </style>
      </head>
    
      <body>
        <div id="map"></div>
    
        <script>
    
          const apiKey = "YOUR-API-KEY";
          const basemapEnum = "ArcGIS:Streets";
    
          const map = new mapboxgl.Map({
            container: "map", // the id of the div element
            style: `https://basemaps-api.arcgis.com/arcgis/rest/services/styles/${basemapEnum}?type=style&apiKey=${apiKey}`,
    
            zoom: 5, // starting zoom
            center: [18.88, 47.33] // starting location [longitude, latitude]
    
          });
    
          const authentication = new arcgisRest.ApiKey({
             key: apiKey
           });
    
          map.getCanvas().style.cursor = "crosshair";
    
          map.on("click", async (e) => {
            // e.lngLat contains the clicked location
    
            const response = await arcgisRest.queryDemographicData({
              studyAreas: [
                {
                  geometry: {
                    x: e.lngLat.lng,
                    y: e.lngLat.lat
                  }
                }
              ],
              authentication: authentication
            });
    
            let message;
            const featureSet = response.results[0].value.FeatureSet;
            if (featureSet.length > 0 && featureSet[0].features.length > 0) {
              const attributes = featureSet[0].features[0].attributes;
              message =
                `<b>Data for a 1 mile search radius</b>` +
                [
                  `Population: ${attributes.TOTPOP.toLocaleString()}`,
                  `Males: ${attributes.TOTMALES.toLocaleString()}`,
                  `Females: ${attributes.TOTFEMALES.toLocaleString()}`,
                  `Average household size: ${attributes.AVGHHSZ}`
                ].join("<br>");
    
            } else {
              message = "Data not available for this location.";
            }
    
            const popup = new mapboxgl.Popup().setHTML(message).setLngLat(e.lngLat).addTo(map);
    
          });
    
        </script>
      </body>
    </html>

Execute the query

You pass one or more study areas to arcgisRest.queryDemographicData to specify the location of your query. To query a circular buffer around a point, pass a geometry object with x and y parameters. The default search radius is one mile.

  1. Create a new arcgisRest.ApiKey to access the feature service.

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    <!DOCTYPE html>
    <html>
    
      <head>
        <meta charset="utf-8" />
        <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
        <script src="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js"></script>
        <link href="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.css" rel="stylesheet" />
    
        <script src="https://unpkg.com/@esri/arcgis-rest-request@3.0.0/dist/umd/request.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-auth@3.0.0/dist/umd/auth.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-demographics@3.0.0/dist/umd/demographics.umd.js"></script>
    
        <style>
          html,
          body,
          #map {
            padding: 0;
            margin: 0;
            height: 100%;
            width: 100%;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 14px;
            color: #323232;
          }
        </style>
      </head>
    
      <body>
        <div id="map"></div>
    
        <script>
    
          const apiKey = "YOUR-API-KEY";
          const basemapEnum = "ArcGIS:Streets";
    
          const map = new mapboxgl.Map({
            container: "map", // the id of the div element
            style: `https://basemaps-api.arcgis.com/arcgis/rest/services/styles/${basemapEnum}?type=style&apiKey=${apiKey}`,
    
            zoom: 5, // starting zoom
            center: [18.88, 47.33] // starting location [longitude, latitude]
    
          });
    
          const authentication = new arcgisRest.ApiKey({
             key: apiKey
           });
    
          map.getCanvas().style.cursor = "crosshair";
    
          map.on("click", async (e) => {
            // e.lngLat contains the clicked location
    
            const response = await arcgisRest.queryDemographicData({
              studyAreas: [
                {
                  geometry: {
                    x: e.lngLat.lng,
                    y: e.lngLat.lat
                  }
                }
              ],
              authentication: authentication
            });
    
            let message;
            const featureSet = response.results[0].value.FeatureSet;
            if (featureSet.length > 0 && featureSet[0].features.length > 0) {
              const attributes = featureSet[0].features[0].attributes;
              message =
                `<b>Data for a 1 mile search radius</b>` +
                [
                  `Population: ${attributes.TOTPOP.toLocaleString()}`,
                  `Males: ${attributes.TOTMALES.toLocaleString()}`,
                  `Females: ${attributes.TOTFEMALES.toLocaleString()}`,
                  `Average household size: ${attributes.AVGHHSZ}`
                ].join("<br>");
    
            } else {
              message = "Data not available for this location.";
            }
    
            const popup = new mapboxgl.Popup().setHTML(message).setLngLat(e.lngLat).addTo(map);
    
          });
    
        </script>
      </body>
    </html>
  2. Inside the click handler, call arcgisRest.queryDemographicData. Pass an array containing a single geometry object made from the event's lngLat property. Also pass the authentication object.

    queryDemographicData is an asynchronous function. Using await, and declaring the click handler async, means the rest of the click handler will wait for the response before continuing.

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    <!DOCTYPE html>
    <html>
    
      <head>
        <meta charset="utf-8" />
        <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
        <script src="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js"></script>
        <link href="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.css" rel="stylesheet" />
    
        <script src="https://unpkg.com/@esri/arcgis-rest-request@3.0.0/dist/umd/request.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-auth@3.0.0/dist/umd/auth.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-demographics@3.0.0/dist/umd/demographics.umd.js"></script>
    
        <style>
          html,
          body,
          #map {
            padding: 0;
            margin: 0;
            height: 100%;
            width: 100%;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 14px;
            color: #323232;
          }
        </style>
      </head>
    
      <body>
        <div id="map"></div>
    
        <script>
    
          const apiKey = "YOUR-API-KEY";
          const basemapEnum = "ArcGIS:Streets";
    
          const map = new mapboxgl.Map({
            container: "map", // the id of the div element
            style: `https://basemaps-api.arcgis.com/arcgis/rest/services/styles/${basemapEnum}?type=style&apiKey=${apiKey}`,
    
            zoom: 5, // starting zoom
            center: [18.88, 47.33] // starting location [longitude, latitude]
    
          });
    
          const authentication = new arcgisRest.ApiKey({
             key: apiKey
           });
    
          map.getCanvas().style.cursor = "crosshair";
    
          map.on("click", async (e) => {
            // e.lngLat contains the clicked location
    
            const response = await arcgisRest.queryDemographicData({
              studyAreas: [
                {
                  geometry: {
                    x: e.lngLat.lng,
                    y: e.lngLat.lat
                  }
                }
              ],
              authentication: authentication
            });
    
            let message;
            const featureSet = response.results[0].value.FeatureSet;
            if (featureSet.length > 0 && featureSet[0].features.length > 0) {
              const attributes = featureSet[0].features[0].attributes;
              message =
                `<b>Data for a 1 mile search radius</b>` +
                [
                  `Population: ${attributes.TOTPOP.toLocaleString()}`,
                  `Males: ${attributes.TOTMALES.toLocaleString()}`,
                  `Females: ${attributes.TOTFEMALES.toLocaleString()}`,
                  `Average household size: ${attributes.AVGHHSZ}`
                ].join("<br>");
    
            } else {
              message = "Data not available for this location.";
            }
    
            const popup = new mapboxgl.Popup().setHTML(message).setLngLat(e.lngLat).addTo(map);
    
          });
    
        </script>
      </body>
    </html>

Show a pop-up

If the query is successful, the response will contain a results array with a value containing a FeatureSet. The FeatureSet contains attributes such as population within the study area, the number of males and females, and the average household size. A message will display if there is no data available for a location selected. See the ArcGIS REST API documentation for more details.

You can use a pop-up to show the results of the query at the location where you clicked on the map.

To add a pop-up to the map, you use the Popup class in Mapbox GL JS. See the Display a pop-up tutorial for more information.

  1. Set a variable containing the contents of the pop-up, using values from the query response.

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    <!DOCTYPE html>
    <html>
    
      <head>
        <meta charset="utf-8" />
        <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
        <script src="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js"></script>
        <link href="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.css" rel="stylesheet" />
    
        <script src="https://unpkg.com/@esri/arcgis-rest-request@3.0.0/dist/umd/request.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-auth@3.0.0/dist/umd/auth.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-demographics@3.0.0/dist/umd/demographics.umd.js"></script>
    
        <style>
          html,
          body,
          #map {
            padding: 0;
            margin: 0;
            height: 100%;
            width: 100%;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 14px;
            color: #323232;
          }
        </style>
      </head>
    
      <body>
        <div id="map"></div>
    
        <script>
    
          const apiKey = "YOUR-API-KEY";
          const basemapEnum = "ArcGIS:Streets";
    
          const map = new mapboxgl.Map({
            container: "map", // the id of the div element
            style: `https://basemaps-api.arcgis.com/arcgis/rest/services/styles/${basemapEnum}?type=style&apiKey=${apiKey}`,
    
            zoom: 5, // starting zoom
            center: [18.88, 47.33] // starting location [longitude, latitude]
    
          });
    
          const authentication = new arcgisRest.ApiKey({
             key: apiKey
           });
    
          map.getCanvas().style.cursor = "crosshair";
    
          map.on("click", async (e) => {
            // e.lngLat contains the clicked location
    
            const response = await arcgisRest.queryDemographicData({
              studyAreas: [
                {
                  geometry: {
                    x: e.lngLat.lng,
                    y: e.lngLat.lat
                  }
                }
              ],
              authentication: authentication
            });
    
            let message;
            const featureSet = response.results[0].value.FeatureSet;
            if (featureSet.length > 0 && featureSet[0].features.length > 0) {
              const attributes = featureSet[0].features[0].attributes;
              message =
                `<b>Data for a 1 mile search radius</b>` +
                [
                  `Population: ${attributes.TOTPOP.toLocaleString()}`,
                  `Males: ${attributes.TOTMALES.toLocaleString()}`,
                  `Females: ${attributes.TOTFEMALES.toLocaleString()}`,
                  `Average household size: ${attributes.AVGHHSZ}`
                ].join("<br>");
    
            } else {
              message = "Data not available for this location.";
            }
    
            const popup = new mapboxgl.Popup().setHTML(message).setLngLat(e.lngLat).addTo(map);
    
          });
    
        </script>
      </body>
    </html>
  2. Create a Popup to display a message containing demographic attributes, and add it to the map at the clicked location.

    Add line.
                                                                                              
    <!DOCTYPE html>
    <html>
    
      <head>
        <meta charset="utf-8" />
        <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
        <script src="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js"></script>
        <link href="https://api.tiles.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.css" rel="stylesheet" />
    
        <script src="https://unpkg.com/@esri/arcgis-rest-request@3.0.0/dist/umd/request.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-auth@3.0.0/dist/umd/auth.umd.js"></script>
        <script src="https://unpkg.com/@esri/arcgis-rest-demographics@3.0.0/dist/umd/demographics.umd.js"></script>
    
        <style>
          html,
          body,
          #map {
            padding: 0;
            margin: 0;
            height: 100%;
            width: 100%;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 14px;
            color: #323232;
          }
        </style>
      </head>
    
      <body>
        <div id="map"></div>
    
        <script>
    
          const apiKey = "YOUR-API-KEY";
          const basemapEnum = "ArcGIS:Streets";
    
          const map = new mapboxgl.Map({
            container: "map", // the id of the div element
            style: `https://basemaps-api.arcgis.com/arcgis/rest/services/styles/${basemapEnum}?type=style&apiKey=${apiKey}`,
    
            zoom: 5, // starting zoom
            center: [18.88, 47.33] // starting location [longitude, latitude]
    
          });
    
          const authentication = new arcgisRest.ApiKey({
             key: apiKey
           });
    
          map.getCanvas().style.cursor = "crosshair";
    
          map.on("click", async (e) => {
            // e.lngLat contains the clicked location
    
            const response = await arcgisRest.queryDemographicData({
              studyAreas: [
                {
                  geometry: {
                    x: e.lngLat.lng,
                    y: e.lngLat.lat
                  }
                }
              ],
              authentication: authentication
            });
    
            let message;
            const featureSet = response.results[0].value.FeatureSet;
            if (featureSet.length > 0 && featureSet[0].features.length > 0) {
              const attributes = featureSet[0].features[0].attributes;
              message =
                `<b>Data for a 1 mile search radius</b>` +
                [
                  `Population: ${attributes.TOTPOP.toLocaleString()}`,
                  `Males: ${attributes.TOTMALES.toLocaleString()}`,
                  `Females: ${attributes.TOTFEMALES.toLocaleString()}`,
                  `Average household size: ${attributes.AVGHHSZ}`
                ].join("<br>");
    
            } else {
              message = "Data not available for this location.";
            }
    
            const popup = new mapboxgl.Popup().setHTML(message).setLngLat(e.lngLat).addTo(map);
    
          });
    
        </script>
      </body>
    </html>

Run the app

In CodePen, run your code to display the map.

You should now see a map centered over eastern Europe. Click on the map to query for demographic data and view the results in a pop-up.

What's next?

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