Tutorial: Find a route and directions

Learn how to find a route and directions with the route service.

Routing is the process of finding the path from an origin to a destination in a street network. You can use the route service to find routes, get driving directions, calculate drive times, and solve complicated, multiple vehicle routing problems. To create a route, you typically define a set of stops (origin and one or more destinations) and use the service to find a route with directions. You can also use a number of additional parameters such as barriers and mode of travel to refine the results.

In this tutorial, you define an origin and destination by clicking on the map. These values are used to get a route and directions from the route service. The directions are also displayed on the map.

Prerequisites

Steps

Get the starter app

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

Set up authentication

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

Set developer credentials

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

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_URL", // 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_URL", // 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 routing and request packages from ArcGIS REST JS.

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       <script src="https://cesium.com/downloads/cesiumjs/releases/1.121/Build/Cesium/Cesium.js"></script>
       <link href="https://cesium.com/downloads/cesiumjs/releases/1.121/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-routing@4/dist/bundled/routing.umd.js"></script>
   
   

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Update the scene

This routing application uses an integrated mesh layer of Frankfurt, Germany. Update the scene extent to focus on Frankfurt.

1. Update the setView command to center on location [8.68019, 50.1147], Frankfurt.

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           viewer.camera.setView({
   
               destination: Cesium.Cartesian3.fromDegrees(8.68019, 50.1147, 500),
               orientation: {
                   heading: Cesium.Math.toRadians(-120),
                   pitch: Cesium.Math.toRadians(-28.0),
               }
   
           });
   

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2. Initialize a terrain provider called geoidService that references the Earth Gravitational Model EGM2008. This provider will allow for geoid conversion between the gravity-based 3D object layer and the ellipsoidal-based Cesium World Terrain.

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           const geoidService = await Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://tiles.arcgis.com/tiles/GVgbJbqm8hXASVYi/arcgis/rest/services/EGM2008/ImageServer");
   
   

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3. Add the data attribution for the elevation layer source.

   • Go to the EGM2008 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 geoidService = await Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://tiles.arcgis.com/tiles/GVgbJbqm8hXASVYi/arcgis/rest/services/EGM2008/ImageServer");
     
             // Attribution text retrieved from https://arcgis.com/home/item.html?id=d798c71512404bbb9c1551b827bf5467
             viewer.creditDisplay.addStaticCredit(new Cesium.Credit("National Geospatial-Intelligence Agency (NGA)", false));
     

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4. Add the Frankfurt integrated mesh layer to the scene as an I3SDataProvider.

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           const i3sProvider = await Cesium.I3SDataProvider.fromUrl("https://tiles.arcgis.com/tiles/cFEFS0EWrhfDeVw9/arcgis/rest/services/Buildings_Frankfurt_2021/SceneServer", {
               geoidTiledTerrainProvider: geoidService,
               token: accessToken
           })
   
           viewer.scene.primitives.add(i3sProvider);
   

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5. Add the data attribution for the scene layer source.

   • Go to the Buildings Frankfurt 2021 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 i3sProvider = await Cesium.I3SDataProvider.fromUrl("https://tiles.arcgis.com/tiles/cFEFS0EWrhfDeVw9/arcgis/rest/services/Buildings_Frankfurt_2021/SceneServer", {
                 geoidTiledTerrainProvider: geoidService,
                 token: accessToken
             })
     
             // Attribution text retrieved from https://www.arcgis.com/home/item.html?id=79c3563e42ee40ddb1b8c688eaf0dd2a
             viewer.creditDisplay.addStaticCredit(new Cesium.Credit("Aerowest GmbH / Esri", false));
     
             viewer.scene.primitives.add(i3sProvider);
     

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Create start and end point graphics

Billboard entities are used to represent the start and end points of the route. You can customize Billboard entities to display custom pins and images.

1. Add two new Billboard entities to the viewer to represent start and end points. Set the position of both entities to null.

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           const geoidService = await Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://tiles.arcgis.com/tiles/GVgbJbqm8hXASVYi/arcgis/rest/services/EGM2008/ImageServer");
   
           // Attribution text retrieved from https://arcgis.com/home/item.html?id=d798c71512404bbb9c1551b827bf5467
           viewer.creditDisplay.addStaticCredit(new Cesium.Credit("National Geospatial-Intelligence Agency (NGA)", false));
   
           const i3sProvider = await Cesium.I3SDataProvider.fromUrl("https://tiles.arcgis.com/tiles/cFEFS0EWrhfDeVw9/arcgis/rest/services/Buildings_Frankfurt_2021/SceneServer", {
               geoidTiledTerrainProvider: geoidService,
               token: accessToken
           })
   
           // Attribution text retrieved from https://www.arcgis.com/home/item.html?id=79c3563e42ee40ddb1b8c688eaf0dd2a
           viewer.creditDisplay.addStaticCredit(new Cesium.Credit("Aerowest GmbH / Esri", false));
   
           viewer.scene.primitives.add(i3sProvider);
   
           const startPoint = viewer.entities.add({
               name: 'start',
               position: null,
               billboard: {
                   verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
                   heightReference: Cesium.HeightReference.CLAMP_TO_GROUND,
   
               }
           })
   
           const endPoint = viewer.entities.add({
               name: 'end',
               position: null,
               billboard: {
                   verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
                   heightReference: Cesium.HeightReference.CLAMP_TO_GROUND,
   
               }
           })
   

   Expand

2. Create a PinBuilder and use it to set the image property of the billboards.

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           const pinBuilder = new Cesium.PinBuilder();
   
           const startPoint = viewer.entities.add({
               name: 'start',
               position: null,
               billboard: {
                   verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
                   heightReference: Cesium.HeightReference.CLAMP_TO_GROUND,
   
                   image: pinBuilder.fromText("1", Cesium.Color.fromCssColorString('#348bdb'), 48).toDataURL(),
   
               }
           })
   
           const endPoint = viewer.entities.add({
               name: 'end',
               position: null,
               billboard: {
                   verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
                   heightReference: Cesium.HeightReference.CLAMP_TO_GROUND,
   
                   image: pinBuilder.fromText("2", Cesium.Color.fromCssColorString('#348bdb'), 48).toDataURL(),
   
               }
           })
   

   Expand

Add a click handler

Use an event handler to set the start (origin) and end (destination) points for the route. The first click will set the startCoords for the route and the second click will set the endCoords. Subsequent clicks will start a new route.

1. Create a currentStep variable initialized to 'start'. Declare startCoords and endCoords variables that will be used within the click handler.

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           const geoidService = await Cesium.ArcGISTiledElevationTerrainProvider.fromUrl("https://tiles.arcgis.com/tiles/GVgbJbqm8hXASVYi/arcgis/rest/services/EGM2008/ImageServer");
   
           // Attribution text retrieved from https://arcgis.com/home/item.html?id=d798c71512404bbb9c1551b827bf5467
           viewer.creditDisplay.addStaticCredit(new Cesium.Credit("National Geospatial-Intelligence Agency (NGA)", false));
   
           const i3sProvider = await Cesium.I3SDataProvider.fromUrl("https://tiles.arcgis.com/tiles/cFEFS0EWrhfDeVw9/arcgis/rest/services/Buildings_Frankfurt_2021/SceneServer", {
               geoidTiledTerrainProvider: geoidService,
               token: accessToken
           })
   
           // Attribution text retrieved from https://www.arcgis.com/home/item.html?id=79c3563e42ee40ddb1b8c688eaf0dd2a
           viewer.creditDisplay.addStaticCredit(new Cesium.Credit("Aerowest GmbH / Esri", false));
   
           viewer.scene.primitives.add(i3sProvider);
   
           let currentStep = 'start';
           let startCoords, endCoords;
   
           const pinBuilder = new Cesium.PinBuilder();
   

   Expand

2. Create a ScreenSpaceEventHandler for the Viewer that listens for left clicks. Create an onLeftClick function that runs when a click is detected.

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           const endPoint = viewer.entities.add({
               name: 'end',
               position: null,
               billboard: {
                   verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
                   heightReference: Cesium.HeightReference.CLAMP_TO_GROUND,
   
                   image: pinBuilder.fromText("2", Cesium.Color.fromCssColorString('#348bdb'), 48).toDataURL(),
   
               }
           })
   
           function onLeftClick(movement) {
   
           }
   
           viewer.screenSpaceEventHandler.setInputAction(onLeftClick, Cesium.ScreenSpaceEventType.LEFT_CLICK);
   

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3. Get the coordinates of the clicked location and use transform them from Cartesian coordinates to longitude and latitude degrees to use with the routing service.

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           function onLeftClick(movement) {
   
               const pickedPosition = viewer.scene.pickPosition(movement.position);
   
               const cartographic = Cesium.Cartographic.fromCartesian(pickedPosition);
               const point = [Cesium.Math.toDegrees(cartographic.longitude), Cesium.Math.toDegrees(cartographic.latitude)]
   
           }
   
           viewer.screenSpaceEventHandler.setInputAction(onLeftClick, Cesium.ScreenSpaceEventType.LEFT_CLICK);
   

   Expand

4. Set the locations of the startPoint and endPoint billboards using a conditional statement. When a new starting position is set, remove all previous billboards and routes.

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           function onLeftClick(movement) {
   
               const pickedPosition = viewer.scene.pickPosition(movement.position);
   
               const cartographic = Cesium.Cartographic.fromCartesian(pickedPosition);
               const point = [Cesium.Math.toDegrees(cartographic.longitude), Cesium.Math.toDegrees(cartographic.latitude)]
   
               if (currentStep === 'start') {
                   startCoords = point;
                   startPoint.position = pickedPosition;
   
                   viewer.dataSources.removeAll();
                   endPoint.position = null;
                   endCoords = null;
   
                   currentStep = 'end';
               }
               else {
                   endCoords = point;
                   endPoint.position = pickedPosition;
                   currentStep = 'start';
               }
   
           }
   
           viewer.screenSpaceEventHandler.setInputAction(onLeftClick, Cesium.ScreenSpaceEventType.LEFT_CLICK);
   

   Expand

5. Run the app. You should be able to click on the map to create two billboards that display the numbers "1" and "2". Subsequent clicks should set new positions for the billboards.

Get the route and directions

To find a route between the points as well as turn-by-turn directions, use the ArcGIS REST JS solveRoute function to make a request to the routing service.

1. Create a new arcgisRest.ApiKeyManager and set your access token.

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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_URL", // The redirect URL registered in your OAuth credentials
           //   portal: "https://www.arcgis.com/sharing/rest" // Your portal URL
           // })
   
           // const accessToken = session.token;
   
           Cesium.ArcGisMapService.defaultAccessToken = accessToken;
   
           const authentication = arcgisRest.ApiKeyManager.fromKey(accessToken);
   

   Expand

2. Create a function called getRoute that accepts two sets of coordinate pairs. Inside, call arcgisRest.solveRoute and provide the coordinates of the starting and ending points.

   More info

   arcgisRest.solveRoute creates a direct request to the solve endpoint of the routing service. To learn more about the solve endpoint, go to Routing service in the Mapping and location services guide.

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           viewer.screenSpaceEventHandler.setInputAction(onLeftClick, Cesium.ScreenSpaceEventType.LEFT_CLICK);
   
           function getRoute(start, end) {
   
               arcgisRest
                   .solveRoute({
                       stops: [start, end],
                       authentication
                   })
   
           }
   

   Expand

3. Access the service response and add the returned GeoJSON to your application as a GeoJsonDataSource.

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           function getRoute(start, end) {
   
               arcgisRest
                   .solveRoute({
                       stops: [start, end],
                       authentication
                   })
   
                   .then((response) => {
                       Cesium.GeoJsonDataSource.load(response.routes.geoJson, {
                           stroke: Cesium.Color.fromCssColorString('#76fcfc'),
                           strokeWidth: 5,
                           clampToGround: true
                       }).then((data) => {
                           viewer.dataSources.add(data);
                       });
   
                   })
   
           }
   

   Expand

4. Access the directions returned by the service and format them as HTML. Create an invisible Entity and set its description to display directions on the map.

   Expand

   Use dark colors for code blocks

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           function getRoute(start, end) {
   
               arcgisRest
                   .solveRoute({
                       stops: [start, end],
                       authentication
                   })
   
                   .then((response) => {
                       Cesium.GeoJsonDataSource.load(response.routes.geoJson, {
                           stroke: Cesium.Color.fromCssColorString('#76fcfc'),
                           strokeWidth: 5,
                           clampToGround: true
                       }).then((data) => {
                           viewer.dataSources.add(data);
                       });
   
                       const directionsHTML = response.directions[0].features.map((f) => f.attributes.text).join("<br/>");
   
                       const directionsPopup = viewer.entities.add({
                           name: "Directions",
                           description: directionsHTML,
                           position: Cesium.Cartesian3.fromDegrees(0, 0),
                       });
   
                       viewer.selectedEntity = directionsPopup;
   
                   })
   
           }
   

   Expand

5. In your onLeftClick function, call getRoute when both a start point and end point have been set.

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           function onLeftClick(movement) {
   
               const pickedPosition = viewer.scene.pickPosition(movement.position);
   
               const cartographic = Cesium.Cartographic.fromCartesian(pickedPosition);
               const point = [Cesium.Math.toDegrees(cartographic.longitude), Cesium.Math.toDegrees(cartographic.latitude)]
   
               if (currentStep === 'start') {
                   startCoords = point;
                   startPoint.position = pickedPosition;
   
                   viewer.dataSources.removeAll();
                   endPoint.position = null;
                   endCoords = null;
   
                   currentStep = 'end';
               }
               else {
                   endCoords = point;
                   endPoint.position = pickedPosition;
                   currentStep = 'start';
               }
   
               if (startCoords && endCoords) {
                   getRoute(startCoords, endCoords);
               }
   
           }
   
           viewer.screenSpaceEventHandler.setInputAction(onLeftClick, Cesium.ScreenSpaceEventType.LEFT_CLICK);
   

   Expand

Run the app

Run the app.

When the application loads, you should be able to click on two different locations to create an origin point and a destination. The routing service should then calculate a driving route between them.

What's next?

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