Get global data

Learn how to query global demographic information with the .

Get global data using API key authentication

The provides global demographic data for 170 countries and regions. To get globally available information, you use the KeyGlobalFacts , which returns information for the total population, total households, average household size, and total population for males and females for a study area.

In this tutorial, you use to access the GeoEnrichment service and display global data for Eastern Europe.

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 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
      • Location services > Data enrichment
  2. When prompted, copy and paste the API key to a safe location. It will be used in the next step.

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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      <script>
    
        /* Use for API key authentication */
        const accessToken = "YOUR_ACCESS_TOKEN";
    
        const map = L.map("map", {
          minZoom: 2
        })
    
        map.setView([34.02, -118.805], 13);
    
        const basemapEnum = "arcgis/streets";
    
        L.esri.Vector.vectorBasemapLayer(basemapEnum, {
          token: accessToken
        }).addTo(map);
    
      </script>
    

Add references to ArcGIS REST JS

  1. Reference the demographics and request modules from ArcGIS REST JS.

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      <!-- Load Leaflet from CDN -->
      <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" crossorigin="" />
      <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js" crossorigin=""></script>
    
      <!-- Load Esri Leaflet from CDN -->
      <script src="https://unpkg.com/esri-leaflet@3.0.14/dist/esri-leaflet.js"></script>
      <script src="https://unpkg.com/esri-leaflet-vector@4.2.7/dist/esri-leaflet-vector.js"></script>
    
      <!-- Load ArcGIS REST JS libraries from https://unpkg.com -->
      <script src="https://unpkg.com/@esri/arcgis-rest-request@4/dist/bundled/request.umd.js"></script>
      <script
        src="https://unpkg.com/@esri/arcgis-rest-demographics@4/dist/bundled/demographics.umd.js"></script>
    
    Expand

Update the map

  1. Center the map on [18.88, 47.33] and set the zoom level to 5. Change the basemapEnum to arcgis/navigation.

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        const basemapEnum = "arcgis/navigation";
    
        const map = L.map("map", {
          minZoom: 2
        });
    
        map.setView([47.33, 18.88], 5); //Eastern Europe
    
        L.esri.Vector.vectorBasemapLayer(basemapEnum, {
          token: accessToken
        }).addTo(map);
    
    Expand

Add a click handler

When you click on the map, your application will display demographic data for the area near the clicked location. Use a click handler to retrieve the coordinates of the click.

  1. Create a function called getDemographicData that takes the latlng coordinates as a parameter.

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        L.esri.Vector.vectorBasemapLayer(basemapEnum, {
          token: accessToken
        }).addTo(map);
    
        function getDemographicData(latlng) {
    
        }
    
    
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  2. Add a click event handler. Inside, call getDemographicData with the LatLng of the clicked location.

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        L.esri.Vector.vectorBasemapLayer(basemapEnum, {
          token: accessToken
        }).addTo(map);
    
        function getDemographicData(latlng) {
    
        }
    
        map.on("click", (e) => {
          getDemographicData(e.latlng);
        });
    
    Expand

Get demographic data

Use the queryDemographicData operation to retrieve demographic data. 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 ApiKeyManager using your .

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        L.esri.Vector.vectorBasemapLayer(basemapEnum, {
          token: accessToken
        }).addTo(map);
    
        const authentication = arcgisRest.ApiKeyManager.fromKey(accessToken);
    
        function getDemographicData(latlng) {
    
        }
    
    Expand
  2. Access the with queryDemographicData. Set the studyAreas parameter with an array containing a single geometry object with longitude and latitude. Set the dataCollections parameter to to ["KeyGlobalFacts"] to obtain global data for your location.

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        function getDemographicData(latlng) {
    
          arcgisRest
            .queryDemographicData({
              studyAreas: [{ geometry: { x: latlng.lng, y: latlng.lat } }],
              dataCollections: ["KeyGlobalFacts"],
              authentication: authentication
            })
    
        }
    
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Display results

If the query is successful, the response will contain a results array with a value containing a FeatureSet. The FeatureSet contains demographic 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. To learn more, go to Data enrichment in the Mapping and location services guide.

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

  1. Access the response FeatureSet in a callback function and check to see if it contains data. If data was returned, access the feature to retrieve demographic information.

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        function getDemographicData(latlng) {
    
          arcgisRest
            .queryDemographicData({
              studyAreas: [{ geometry: { x: latlng.lng, y: latlng.lat } }],
              dataCollections: ["KeyGlobalFacts"],
              authentication: authentication
            })
    
            .then((response) => {
              const featureSet = response.results[0].value.FeatureSet;
              let message;
    
              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><br>Population: ${attributes.TOTPOP}<br>Males: ${attributes.TOTMALES} <br>Females: ${attributes.TOTFEMALES}<br>Average Household Size: ${attributes.AVGHHSZ}`;
              } else {
                message = "Data not available for this location.";
              }
    
            });
    
        }
    
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  2. Display a Popup at the clicked location containing the demographic information.

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            .then((response) => {
              const featureSet = response.results[0].value.FeatureSet;
              let message;
    
              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><br>Population: ${attributes.TOTPOP}<br>Males: ${attributes.TOTMALES} <br>Females: ${attributes.TOTFEMALES}<br>Average Household Size: ${attributes.AVGHHSZ}`;
              } else {
                message = "Data not available for this location.";
              }
    
              var popup = L.popup().setLatLng(latlng).setContent(message).openOn(map);
    
            });
    
    Expand

Run the app

Run the app.

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 popup

What's next?

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

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

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

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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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