Tutorial: Get local data

Learn how to access local data, such as spending trends, for the United States.

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 detailed local data for specific countries. Each individual data field is represented by an analysis variableAn analysis variable is a data field name that defines which data to query and return from the GeoEnrichment service.Learn more that are organized into data categories such as spending and market behaviors such as 2022 Educational Attainment or 2022 Seen Video Ad at Gas Station Last 30 Days. The data available vary by country and by data provider.

In this tutorial, use ArcGIS REST JS to access the GeoEnrichment service and display spending trend information for a study area within the United States.

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

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 references to ArcGIS REST JS

1. In the <head> element, reference the demographics and request packages from ArcGIS REST JS.

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       <script src="https://cesium.com/downloads/cesiumjs/releases/1.140/Build/Cesium/Cesium.js"></script>
       <link href="https://cesium.com/downloads/cesiumjs/releases/1.140/Build/Cesium/Widgets/widgets.css" rel="stylesheet">
   
       <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 position

Local data is only available in select countries and regions. Update the camera position to center on Nashville, Tennessee.

1. Update the camera destination to [-86.7679, 36.1345, 15000], Nashville TN.

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         viewer.camera.setView({
   
           destination: Cesium.Cartesian3.fromDegrees(-86.7679, 36.1345, 15000),
           orientation: {
             heading: Cesium.Math.toRadians(0.0),
             pitch: Cesium.Math.toRadians(-80.0)
   
           }
         });
   

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Add a click event handler

The study areaA GeoEnrichment study area is a location used for spatial analysis in the GeoEnrichment service.Learn more for your application will be a one-mile buffer around a clicked location. Add an event handler that listens for left clicks on the map and retrieves their coordinates.

1. Add an event listener to the viewer's ScreenSpaceEventHandler that listens for left clicks.

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           destination: Cesium.Cartesian3.fromDegrees(-86.7679, 36.1345, 15000),
           orientation: {
             heading: Cesium.Math.toRadians(0.0),
             pitch: Cesium.Math.toRadians(-80.0)
   
           }
         });
   
         // Add Esri attribution
         // Learn more in https://esriurl.com/attribution
         const poweredByEsri = new Cesium.Credit("Powered by <a href='https://www.esri.com/en-us/home' target='_blank'>Esri</a>", true);
         viewer.creditDisplay.addStaticCredit(poweredByEsri);
   
         viewer.screenSpaceEventHandler.setInputAction(function (movement) {
   
         }, Cesium.ScreenSpaceEventType.LEFT_CLICK);
   

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2. Retrieve the coordinates of the left click and convert them to Cartographic latitude and longitude. Pass the coordinates to a new function called getLocalData that accepts coordinates as degrees.

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           destination: Cesium.Cartesian3.fromDegrees(-86.7679, 36.1345, 15000),
           orientation: {
             heading: Cesium.Math.toRadians(0.0),
             pitch: Cesium.Math.toRadians(-80.0)
   
           }
         });
   
         // Add Esri attribution
         // Learn more in https://esriurl.com/attribution
         const poweredByEsri = new Cesium.Credit("Powered by <a href='https://www.esri.com/en-us/home' target='_blank'>Esri</a>", true);
         viewer.creditDisplay.addStaticCredit(poweredByEsri);
   
         function getLocalData(longitude, latitude) {
   
         }
   
         viewer.screenSpaceEventHandler.setInputAction(function (movement) {
   
           const pickedPosition = viewer.scene.pickPosition(movement.position);
           const cartographic = Cesium.Cartographic.fromCartesian(pickedPosition);
   
           getLocalData(Cesium.Math.toDegrees(cartographic.longitude), Cesium.Math.toDegrees(cartographic.latitude));
   
         }, Cesium.ScreenSpaceEventType.LEFT_CLICK);
   

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Execute the query

Execute the queryDemographicData operation to retrieve local data. To query a circular buffer around a point, pass a geometry object with x and y coordinates. The default search radius is one mile.

1. Create a new ApiKeyManager using your access token to authenticate requests to the GeoEnrichment service.

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         /* 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 authentication = arcgisRest.ApiKeyManager.fromKey(accessToken);
   

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2. Access 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 with 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 passed longitude and latitude. Also pass the authentication object.

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         function getLocalData(longitude, latitude) {
   
           arcgisRest
             .queryDemographicData({
               studyAreas: [{ geometry: { x: longitude, y: latitude } }],
               authentication: authentication,
   
             })
   
         }
   

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3. Set the analysisVariables parameter with the following analysis variables:

   • Buys Natural Products (PsychographicsShopping.MP28067A_B)
   • Auto/Truck Rental on Trips (transportation.X7027_I)
   • Membership fees for Social Clubs (entertainment.X9005_I)
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         function getLocalData(longitude, latitude) {
   
           arcgisRest
             .queryDemographicData({
               studyAreas: [{ geometry: { x: longitude, y: latitude } }],
               authentication: authentication,
   
               analysisVariables: ["PsychographicsShopping.MP28067A_B", "transportation.X7027_I", "entertainment.X9005_I"]
   
             })
   
         }
   

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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 values representing the prevalence of each specified analysis variable in the provided study area. A message will display if there is no data available for a location selected.

1. Access the FeatureSet returned by the service response. If data was returned, access the feature attributesAttributes are fields and values for a single feature or non-spatial record. They are typically stored in a database or service such as a feature service.Learn more to create a message.

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               analysisVariables: ["PsychographicsShopping.MP28067A_B", "transportation.X7027_I", "entertainment.X9005_I"]
   
             })
   
             .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>" +
                   [
                     `Buys Natural Products: ${attributes.MP28067a_B}`,
                     `Membership fees for Social Clubs: ${attributes.X9005_I}`,
                     `Auto/Truck Rental on Trips: ${attributes.X7027_I}`
                   ].join("<br>");
   
               } else {
                 message = "Data not available for this location.";
               }
   
             });
   

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2. Create a new Entity to display the results. Set the position to the clicked location, and set the description to the message you created.

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               } else {
                 message = "Data not available for this location.";
               }
   
               let resultEntity = new Cesium.Entity({
                 name: "Demographic results",
                 description: message,
                 position: Cesium.Cartesian3.fromDegrees(longitude, latitude)
               });
   
               viewer.selectedEntity = resultEntity;
   

   Expand

Run the app

Run the app.

You should now see a map centered over Nashville. Click on the map to access the GeoEnrichment service to return local information and view the results in a popup.

What's next?

Learn how to use additional location services in these tutorials: