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Showing content from https://developers.arcgis.com/cesiumjs/layers/add-features-as-geojson/ below:

Tutorial: Add features as GeoJSON | CesiumJS

Learn how to add features from a feature service to a scene.

Add features as GeoJSON using API key authentication Add features as GeoJSON using user authentication

Features are a type of geographic data that contain a geometry and attributes. They are typically hosted in an ArcGIS feature service. You can query a feature service to return features formatted as GeoJSON.

This tutorial explains how to get features from a feature service with ArcGIS REST JS, then display them in your CesiumJS application as a GeoJsonDataSource. The tutorial uses three different feature layers, containing points, lines, and polygons.

The three layers you will use are:

Portal and data services guide

To learn how to publish your own data as a feature service, go to Data hosting.

Prerequisites

An ArcGIS Location Platform or ArcGIS Online account.

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

Go to the Display a scene tutorial and download the solution.
Unzip the folder and open it in a text editor of your choice, such as Visual Studio Code. The starter app includes the following:
- callback.html: This contains callback as part of the authentication process.
- index.html: This contains app logic and the OAuth 2.0 code necessary to perform the authentication.

Set up authentication

Create developer credentials in your portal for the type of authentication you selected.

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

Go to the Create an API key tutorial and create an API key with the following privilege(s):
- Privileges
  - Location services > Basemaps
- Item access
  - Note: If you are using your own custom data layer for this tutorial, you need to grant the API key credentials access to the layer item. Learn more in Item access privileges.
Copy the API key access token to your clipboard when prompted.

Create a new OAuth credential to register the application.

Go to the Create OAuth credentials for user authentication tutorial to create an OAuth credential.
Copy the Client ID and Redirect URL from your OAuth credentials item and paste them to a safe location. They will be used in a later step.

Note

To use this application, users must have an ArcGIS account with the necessary privileges to access all resources and services.

Set developer credentials

Use the API key or OAuth developer credentials created in the previous step in your application.

Add <script> elements in the HTML <body> and create an accessToken variable to store your access token. Set YOUR_ACCESS_TOKEN with the access token you previously copied from your API key credentials.

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  <script>

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

  </script>

Set the defaultAccessToken included with Cesium to authenticate requests to the ArcGIS services used in this tutorial.

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  <script>

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

    Cesium.ArcGisMapService.defaultAccessToken = accessToken;

  </script>

In both the index.html and callback.html files, set the properties of clientId and redirectUri with the client ID and redirect URL of your OAuth credentials.

index.html

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    /* Use for user authentication */
    const clientId = "YOUR_CLIENT_ID"; // Your client ID from OAuth credentials
    const redirectUri = "YOUR_REDIRECT_URI"; // The redirect URL registered in your OAuth credentials
    const session = await arcgisRest.ArcGISIdentityManager.beginOAuth2({
      clientId,
      redirectUri,
      portal: "https://www.arcgis.com/sharing/rest" // Your portal URL
    })

    const accessToken = session.token;

callback.html

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    arcgisRest.ArcGISIdentityManager.completeOAuth2({
      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
    })

Run the app and ensure you can sign in successfully.

If you are unable to sign in, make sure you have the correct redirect URL and port. This URL varies based on your application and typically takes the format of https://<server>[:port]/callback.html or http://my-arcgis-app:/auth. For example, if you are running an application on http://127.0.0.1:5500/, set http://127.0.0.1:5500/callback.html as your redirect URL in the index.html and callback.html file and your developer credential. They all have to match!

Set the defaultAccessToken included with Cesium to authenticate requests to the ArcGIS services used in this tutorial.

index.html

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    Cesium.ArcGisMapService.defaultAccessToken = accessToken;

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.

Go to your Cesium ion dashboard to generate an access token. Copy the key to your clipboard.

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>

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

In the <head> element, reference the feature-service and request packages from ArcGIS REST JS.

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    <script src="https://cesium.com/downloads/cesiumjs/releases/1.132/Build/Cesium/Cesium.js"></script>
    <link href="https://cesium.com/downloads/cesiumjs/releases/1.132/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-feature-service@4/dist/bundled/feature-service.umd.js"></script>

In the <body>, create an arcgisRest.ApiKeyManager using your access token to authenticate requests to the feature 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);

Add point features

Point features are typically displayed on top of all other layers. Use arcgisRest.queryFeatures to query the Trailheads feature service and add features to the scene as GeoJSON.

Tip

The maximum number of features returned by a single query request to hosted feature layers is 2000. To return more, you need to detect if the request exceeded the maximum feature amount with exceededTransferLimit, and then use the resultOffset parameter to make multiple requests with the appropriate offset values. To learn more, go to Query Layer.

Go to the Trailheads URL and browse the properties of the layer. Make note of the layer's Name, Type, and Fields.

In CodePen, define a variable to store the URL of the feature service.

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    const pointLayerName = "Trailheads";
    const pointLayerURL = "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/"+pointLayerName+"/FeatureServer/0";

Call the arcgisRest.queryFeatures operation to make an authenticated request to the Trailheads feature service. Set the f property to geojson to format the response as GeoJSON.

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    const pointLayerName = "Trailheads";
    const pointLayerURL = "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/"+pointLayerName+"/FeatureServer/0";

    arcgisRest.queryFeatures({
        url: pointLayerURL,
        authentication,
        f:"geojson"
    }).then((response) => {

    });

Add the service response service to the scene as a GeoJsonDataSource. Set the clampToGround property to clamp the features to terrain.

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    const pointLayerName = "Trailheads";
    const pointLayerURL = "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/"+pointLayerName+"/FeatureServer/0";

    arcgisRest.queryFeatures({
        url: pointLayerURL,
        authentication,
        f:"geojson"
    }).then((response) => {

        const data = Cesium.GeoJsonDataSource.load(response,{
            clampToGround:true,

        })
        viewer.dataSources.add(data);

    });

Add the data attribution for the feature layer source.

Go to the Trailheads (Santa Monica Mountains) item.
Scroll down to the Credits (Attribution) section and copy its value.

Create an attribution property and paste the attribution value from the item.

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    const pointLayerName = "Trailheads";
    const pointLayerURL = "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/"+pointLayerName+"/FeatureServer/0";

    arcgisRest.queryFeatures({
        url: pointLayerURL,
        authentication,
        f:"geojson"
    }).then((response) => {

        const data = Cesium.GeoJsonDataSource.load(response,{
            clampToGround:true,

            // Attribution text retrieved from https://arcgis.com/home/item.html?id=883cedb8c9fe4524b64d47666ed234a7
            credit: new Cesium.Credit('Los Angeles GeoHub', false)

        })
        viewer.dataSources.add(data);

    });

Note

To learn how to get attribution from an item, go to Esri and data attribution.

Add polyline features

Line features are typically displayed below points. Use arcgisRest.queryFeatures to query the Trails feature service and add features to the scene as GeoJSON.

Go to the Trails URL and browse the properties of the layer. Make note of the layer's Name, Type, and Fields.

In CodePen, define a variable to store the URL of the feature service.

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    const lineLayerName = "Trails";
    const lineLayerURL = "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/"+lineLayerName+"/FeatureServer/0";

Call the arcgisRest.queryFeatures operation to make an authenticated request to the Trails feature service. Set the f property to geojson to format the response as GeoJSON.

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    const lineLayerName = "Trails";
    const lineLayerURL = "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/"+lineLayerName+"/FeatureServer/0";

    arcgisRest.queryFeatures({
        url: lineLayerURL,
        authentication,
        f:"geojson"
    }).then((response) => {

    });

Add the service response service to your scene as a GeoJsonDataSource. Set the clampToGround property to clamp the features to terrain.

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    const lineLayerName = "Trails";
    const lineLayerURL = "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/"+lineLayerName+"/FeatureServer/0";

    arcgisRest.queryFeatures({
        url: lineLayerURL,
        authentication,
        f:"geojson"
    }).then((response) => {

        const data = Cesium.GeoJsonDataSource.load(response,{
            clampToGround:true,

        })
        viewer.dataSources.add(data);

    });

Add the data attribution for the feature layer source.

Go to the Trails item.
Scroll down to the Credits (Attribution) section and copy its value.

Create an attribution property and paste the attribution value from the item.

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    const lineLayerName = "Trails";
    const lineLayerURL = "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/"+lineLayerName+"/FeatureServer/0";

    arcgisRest.queryFeatures({
        url: lineLayerURL,
        authentication,
        f:"geojson"
    }).then((response) => {

        const data = Cesium.GeoJsonDataSource.load(response,{
            clampToGround:true,

            // Attribution text retrieved from https://arcgis.com/home/item.html?id=69e12682738e467eb509d8b54dc73cbd
            credit: "Los Angeles GeoHub"

        })
        viewer.dataSources.add(data);

    });

Note

To learn how to get attribution from an item, go to Esri and data attribution.

Add polygon features

Polygon features are typically displayed below lines and points. Use arcgisRest.queryFeatures to query the Parks and Open Spaces feature service and add features to the scene as GeoJSON.

Go to the Parks and Open Spaces URL and browse the properties of the layer. Make note of the layer's Name, Type, and Fields.

In CodePen, define a variable to store the URL of the feature service.

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    const polygonLayerName = "Parks_and_Open_Space";
    const polygonLayerURL = "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/"+polygonLayerName+"/FeatureServer/0";

Call the arcgisRest.queryFeatures operation to make an authenticated request to the Parks and Open Spaces feature service. Set the f property to geojson to format the response as GeoJSON.

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    const polygonLayerName = "Parks_and_Open_Space";
    const polygonLayerURL = "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/"+polygonLayerName+"/FeatureServer/0";

    arcgisRest.queryFeatures({
        url: polygonLayerURL,
        authentication,
        f:"geojson"
    }).then((response) => {

    });

Add the service response service to your scene as a GeoJsonDataSource. Set the clampToGround property to clamp the features to terrain.

Expand

Use dark colors for code blocks

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    const polygonLayerName = "Parks_and_Open_Space";
    const polygonLayerURL = "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/"+polygonLayerName+"/FeatureServer/0";

    arcgisRest.queryFeatures({
        url: polygonLayerURL,
        authentication,
        f:"geojson"
    }).then((response) => {

        const data = Cesium.GeoJsonDataSource.load(response,{
            clampToGround:true,


        })
        viewer.dataSources.add(data);

    });

Add the data attribution for the feature layer source.

Go to the Parks and Open Space item.
Scroll down to the Credits (Attribution) section and copy its value.

Create an attribution property and paste the attribution value from the item.

Expand

Use dark colors for code blocks

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    const polygonLayerName = "Parks_and_Open_Space";
    const polygonLayerURL = "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/"+polygonLayerName+"/FeatureServer/0";

    arcgisRest.queryFeatures({
        url: polygonLayerURL,
        authentication,
        f:"geojson"
    }).then((response) => {

        const data = Cesium.GeoJsonDataSource.load(response,{
            clampToGround:true,

            // Attribution text retrieved from https://arcgis.com/home/item.html?id=f2ea5d874dad427294641d2d45097c0e
            credit: "Los Angeles GeoHub"


        })
        viewer.dataSources.add(data);

    });

Note

To learn how to get attribution from an item, go to Esri and data attribution.

Run the app

Run the app.

Your map should display the locations of trailheads, trails, and open spaces in the Santa Monica Mountains.

What's next?

Learn how to use additional ArcGIS Location Services in these tutorials:

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