Get global data

Learn how to query demographic information for locations around the world with the ArcGIS GeoEnrichment serviceA GeoEnrichment service is a service that aggregates demographic data and local facts for locations around the world. It is used to provide insight about the people and places near a location. It is hosted by Esri as the ArcGIS GeoEnrichment service and can also be hosted in ArcGIS Enterprise.Learn more.

The ArcGIS GeoEnrichment serviceA GeoEnrichment service is a service that aggregates demographic data and local facts for locations around the world. It is used to provide insight about the people and places near a location. It is hosted by Esri as the ArcGIS GeoEnrichment service and can also be hosted in ArcGIS Enterprise.Learn more provides global demographic data for 170 countries and regions. To get globally available information, you use the KeyGlobalFacts data collectionA data collection is pre-defined and categorized list of analysis variables (data field names) that are used by the GeoEnrichment service.Learn more, 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, use ArcGIS REST JS to access the GeoEnrichment service and display global data for Eastern Europe.

Prerequisites

Steps

Get the starter app

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

Set up authentication

Set developer credentials

Use the API key or OAuth developer credentialsDeveloper credentials are a type of item in a portal that contains parameters for authentication. There are two types of developer credentials: API key credentials and OAuth credentials.Learn more so your application can access ArcGIS servicesA service, also known as an ArcGIS service, is software that supports an ArcGIS REST API and provides geospatial functionality or data. A service can be hosted by Esri or in ArcGIS Enterprise.Learn more.

Add references to ArcGIS REST JS

This tutorial uses ArcGIS REST JS to access the geoenrichment service. It also uses the ol-popup library to display pop-ups.

1. Reference the ArcGIS REST JS and ol-popup libraries.

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       <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@v10.9.0/ol.css">
       <script src="https://cdn.jsdelivr.net/npm/ol@v10.9.0/dist/ol.js"></script>
       <script src="https://cdn.jsdelivr.net/npm/ol-mapbox-style@13.4.1/dist/olms.js"></script>
       <script src="https://unpkg.com/ol-popup@5.1.1/dist/ol-popup.js"></script>
       <link rel="stylesheet" href="https://unpkg.com/ol-popup@5.1.1/src/ol-popup.css">
   
       <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>
   

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Update the map

The GeoEnrichment serviceA GeoEnrichment service is a service that aggregates demographic data and local facts for locations around the world. It is used to provide insight about the people and places near a location. It is hosted by Esri as the ArcGIS GeoEnrichment service and can also be hosted in ArcGIS Enterprise.Learn more has data sources for many countries around the world, including most of Europe. Update the position of the map to center on eastern Europe and the basemapId.

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

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       map.setView(
         new ol.View({
   
           center: ol.proj.fromLonLat([18.88, 47.33]),
           zoom: 5
   
         })
       );
   

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2. Update the basemapId to arcgis/navigation.

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       const basemapId = "arcgis/navigation";
   
       const basemapURL = `https://basemapstyles-api.arcgis.com/arcgis/rest/services/styles/v2/styles/${basemapId}?token=${accessToken}`;
   
       olms.apply(map, basemapURL).then(function (map) {
   
   

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Add a click event handler

You need a locationA location is a position or region (point, line, or polygon) on the earth's surface.Learn more before calling the GeoEnrichment serviceA GeoEnrichment service is a service that aggregates demographic data and local facts for locations around the world. It is used to provide insight about the people and places near a location. It is hosted by Esri as the ArcGIS GeoEnrichment service and can also be hosted in ArcGIS Enterprise.Learn more. 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 Coordinate.

You can change the mouse cursor to a crosshair to make it easier to click precisely. Modify the CSS style of its canvas element to do this.

1. In the <style>, set the mouse cursor style to crosshair.

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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;
       }
   
   
       #map canvas {
         cursor: crosshair;
       }
   
       </style>
   

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2. Add a handler for the click event. Inside, convert the click coordinate to a longitude and latitude and save it in a variable.

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       olms.apply(map, basemapURL).then(function (map) {
   
         map.on("click", (event) => {
   
           const lonLat = ol.proj.toLonLat(event.coordinate);
   
         });
   
         // Add Esri attribution
         // Learn more in https://esriurl.com/attribution
         const source = map.getLayers().item(0).getSource();
         const poweredByEsriString = "Powered by <a href='https://www.esri.com/en-us/home' target='_blank'>Esri</a> | ";
   
         const attributionFn = source.getAttributions();
         if (attributionFn) {
           source.setAttributions((ViewStateLayerStateExtent) => {
             return [poweredByEsriString, ...attributionFn(ViewStateLayerStateExtent)];
           });
         } else source.setAttributions(poweredByEsriString);
   
       });
   

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Execute the query

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

1. Inside the click handler, create a new arcgisRest.ApiKeyManager and call queryDemographicData. Set the studyAreas parameter to a pointA point is a type of geometry containing a single set of x,y coordinates and a spatial reference.Learn more geometry made from the event's lngLat property. Set the dataCollections parameter to to ["KeyGlobalFacts"] to obtain global data for your location.

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         map.on("click", (event) => {
   
           const lonLat = ol.proj.toLonLat(event.coordinate);
   
           const authentication = arcgisRest.ApiKeyManager.fromKey(accessToken);
   
           arcgisRest
             .queryDemographicData({
               studyAreas: [{ geometry: { x: lonLat[0], y: lonLat[1] } }],
               dataCollections: ["KeyGlobalFacts"],
               authentication: authentication
             })
   
         });
   

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Display the results

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. To learn more, visit the GeoEnrichment service page.

You will display the results of the query in a pop-up.

1. Before the click handler, create a Popup and save it to a popup variable. Add it to the map with map.addOverlay.

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       const basemapId = "arcgis/navigation";
   
       const basemapURL = `https://basemapstyles-api.arcgis.com/arcgis/rest/services/styles/v2/styles/${basemapId}?token=${accessToken}`;
   
       olms.apply(map, basemapURL).then(function (map) {
   
         const popup = new Popup();
         map.addOverlay(popup);
   

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2. Add a then handler to the queryDemographicData call. Inside, store the FeatureSet from the first result in a variable.

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           arcgisRest
             .queryDemographicData({
               studyAreas: [{ geometry: { x: lonLat[0], y: lonLat[1] } }],
               dataCollections: ["KeyGlobalFacts"],
               authentication: authentication
             })
   
             .then((response) => {
   
               const featureSet = response.results[0].value.FeatureSet;
   
             });
   

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3. If the FeatureSet contains data, use its attributes to build a message to show. Use popup.show to display the message at the location of the mouse click. Otherwise, display a "Data not available" message.

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               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}`,
                     `Males: ${attributes.TOTMALES} `,
                     `Females: ${attributes.TOTFEMALES}`,
                     `Average Household Size: ${attributes.AVGHHSZ}`
                   ].join("<br>");
               } else {
                 message = "Data not available for this location.";
               }
               popup.show(event.coordinate, message);
   

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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 location services in these tutorials: