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

You need an ArcGIS Location Platform or ArcGIS Online account.

Steps

Create a new pen

  1. To get started, either complete the Display a map tutorial or .

Get an access token

You need an access token with the correct privileges to access the resources used in this tutorial.

  1. Go to the Create an API key tutorial and create an API key with the following privilege(s):

    • Privileges
      • Location services > Basemaps
      • Location services > Routing
  2. Copy the API key access token to your clipboard when prompted.

  3. In CodePen, update the accessToken variable to use your access token.

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          const map = L.map("map", {
            minZoom: 2
          })
    
          map.setView([34.02, -118.805], 13);
    
          const accessToken = "YOUR_ACCESS_TOKEN";
    
          const basemapEnum = "arcgis/streets";
    
          L.esri.Vector.vectorBasemapLayer(basemapEnum, {
            token: accessToken
          }).addTo(map);
    

To learn about the other types of authentication available, go to Types of authentication.

Add references to ArcGIS REST JS

  1. Reference the routing and request packages 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@3.0.12/dist/esri-leaflet.js"></script>
        <script src="https://unpkg.com/esri-leaflet-vector@4.2.5/dist/esri-leaflet-vector.js"></script>
    
        <!-- Load ArcGIS REST JS from CDN -->
        <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>
    
    Expand

Update the map

A navigation basemap layer is typically used in geocoding and routing applications. Update the basemap layer to use arcgis/navigation.

  1. Update the basemap enumeration and change the map view to center on location [-79.3832,43.6532], Toronto.

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          const accessToken = "YOUR_ACCESS_TOKEN";
    
          const basemapEnum = "arcgis/navigation";
    
          const map = L.map("map", {
            minZoom: 2
          })
    
          map.setView([43.6532, -79.3832], 12); // Toronto
    
          L.esri.Vector.vectorBasemapLayer(basemapEnum, {
            token: accessToken
          }).addTo(map);
    
    Expand

Add layer groups

To display a route, you need a start point, end point, and a connecting route line.

  1. Add a separate LayerGroup for the start point, end point, and route line.

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          L.esri.Vector.vectorBasemapLayer(basemapEnum, {
            token: accessToken
          }).addTo(map);
    
          const startLayerGroup = L.layerGroup().addTo(map);
          const endLayerGroup = L.layerGroup().addTo(map);
    
          const routeLines = L.layerGroup().addTo(map);
    
    Expand

Set start and end points

Use an event handler to set the start (origin) and end (destination) points. 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 with its initial value set to start. Declare startCoords and endCoords variables that will be used within the click handler.

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          const startLayerGroup = L.layerGroup().addTo(map);
          const endLayerGroup = L.layerGroup().addTo(map);
    
          const routeLines = L.layerGroup().addTo(map);
    
          let currentStep = "start";
          let startCoords, endCoords;
    
    Expand
  2. Add a click handler to the map. Store the LatLng of the clicked location in a coordinates variable.

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          let currentStep = "start";
          let startCoords, endCoords;
    
          map.on("click", (e) => {
            const coordinates = [e.latlng.lng, e.latlng.lat];
    
          });
    
    Expand
  3. Create a conditional statement that sets the currentStep as either start or end. If a new start point is set, call the clearLayers method to remove the previous route from each layerGroup.

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          map.on("click", (e) => {
            const coordinates = [e.latlng.lng, e.latlng.lat];
    
            if (currentStep === "start") {
    
              startLayerGroup.clearLayers();
              endLayerGroup.clearLayers();
              routeLines.clearLayers();
    
              currentStep = "end";
            } else {
    
              currentStep = "start";
            }
    
          });
    
    Expand
  4. Add a Marker to startLayerGroup and endLayerGroup to display the locations of the startCoords and endCoords.

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          map.on("click", (e) => {
            const coordinates = [e.latlng.lng, e.latlng.lat];
    
            if (currentStep === "start") {
    
              startLayerGroup.clearLayers();
              endLayerGroup.clearLayers();
              routeLines.clearLayers();
    
              L.marker(e.latlng).addTo(startLayerGroup);
              startCoords = coordinates;
    
              currentStep = "end";
            } else {
    
              L.marker(e.latlng).addTo(endLayerGroup);
              endCoords = coordinates;
    
              currentStep = "start";
            }
    
          });
    
    Expand
  5. Run your app. You should be able to click in two places to set markers for the start and end.

Get the route

To find the route, you use ArcGIS REST JS to call the solveRoute function to access the routing service.

  1. Above the click handler, create a function called updateRoute. Inside, create a new ApiKeyManager to access the routing service. Call solveRoute with the two sets of coordinates as a stops array.

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          let currentStep = "start";
          let startCoords, endCoords;
    
          function updateRoute() {
            // Create the arcgis-rest-js authentication object to use later.
            const authentication = arcgisRest.ApiKeyManager.fromKey(accessToken);
    
            // make the API request
            arcgisRest
              .solveRoute({
                stops: [startCoords, endCoords],
                endpoint: "https://route-api.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World/solve",
                authentication
              })
    
          }
    
          map.on("click", (e) => {
            const coordinates = [e.latlng.lng, e.latlng.lat];
    
            if (currentStep === "start") {
    
              startLayerGroup.clearLayers();
              endLayerGroup.clearLayers();
              routeLines.clearLayers();
    
              L.marker(e.latlng).addTo(startLayerGroup);
              startCoords = coordinates;
    
              currentStep = "end";
            } else {
    
              L.marker(e.latlng).addTo(endLayerGroup);
              endCoords = coordinates;
    
              currentStep = "start";
            }
    
          });
    
    Expand
  2. Create a response handler that clears any previous route and adds a GeoJSON layer with the new route displayed in the routeLines layer.

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          function updateRoute() {
            // Create the arcgis-rest-js authentication object to use later.
            const authentication = arcgisRest.ApiKeyManager.fromKey(accessToken);
    
            // make the API request
            arcgisRest
              .solveRoute({
                stops: [startCoords, endCoords],
                endpoint: "https://route-api.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World/solve",
                authentication
              })
    
              .then((response) => {
    
                routeLines.clearLayers();
                L.geoJSON(response.routes.geoJson).addTo(routeLines);
    
              })
    
          }
    
    Expand
  3. Add an error handler. Inside, show an alert and log a message.

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          function updateRoute() {
            // Create the arcgis-rest-js authentication object to use later.
            const authentication = arcgisRest.ApiKeyManager.fromKey(accessToken);
    
            // make the API request
            arcgisRest
              .solveRoute({
                stops: [startCoords, endCoords],
                endpoint: "https://route-api.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World/solve",
                authentication
              })
    
              .then((response) => {
    
                routeLines.clearLayers();
                L.geoJSON(response.routes.geoJson).addTo(routeLines);
    
              })
    
              .catch((error) => {
                console.error(error);
                alert("There was a problem using the route service. See the console for details.");
              });
    
          }
    
    Expand
  4. Update the click event handler to call updateRoute once the start and end coordinates are set.

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          map.on("click", (e) => {
            const coordinates = [e.latlng.lng, e.latlng.lat];
    
            if (currentStep === "start") {
    
              startLayerGroup.clearLayers();
              endLayerGroup.clearLayers();
              routeLines.clearLayers();
    
              L.marker(e.latlng).addTo(startLayerGroup);
              startCoords = coordinates;
    
              currentStep = "end";
            } else {
    
              L.marker(e.latlng).addTo(endLayerGroup);
              endCoords = coordinates;
    
              currentStep = "start";
            }
    
            if (startCoords && endCoords) {
              updateRoute();
            }
    
          });
    
    Expand
  5. Run your app. You should be able to set start and end points and view a route line plotted between them.

Show directions

The data returned from the routing service contains directions information. To display it, you can create a styled <div> element and populate it with the directions retrieved from the response.

  1. Create a <div> element with an id of directions.

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          L.esri.Vector.vectorBasemapLayer(basemapEnum, {
            token: accessToken
          }).addTo(map);
    
          const directions = document.createElement("div");
          directions.id = "directions";
          directions.innerHTML = "Click on the map to create a start and end for the route.";
          document.body.appendChild(directions);
    
          const startLayerGroup = L.layerGroup().addTo(map);
          const endLayerGroup = L.layerGroup().addTo(map);
    
    Expand
  2. In the updateRoute() function, set the innerHTML with the directions from the response. Clear the startCoords and endCoords.

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          function updateRoute() {
            // Create the arcgis-rest-js authentication object to use later.
            const authentication = arcgisRest.ApiKeyManager.fromKey(accessToken);
    
            // make the API request
            arcgisRest
              .solveRoute({
                stops: [startCoords, endCoords],
                endpoint: "https://route-api.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World/solve",
                authentication
              })
    
              .then((response) => {
    
                routeLines.clearLayers();
                L.geoJSON(response.routes.geoJson).addTo(routeLines);
    
                const directionsHTML = response.directions[0].features.map((f) => f.attributes.text).join("<br/>");
                directions.innerHTML = directionsHTML;
                startCoords = null;
                endCoords = null;
    
              })
    
              .catch((error) => {
                console.error(error);
                alert("There was a problem using the route service. See the console for details.");
              });
    
          }
    
    Expand

Run the app

In CodePen, run your code to display the map.

When the map displays, you should be able to click on it once to create an origin point and again to create a destination point. The routing service should then display the resulting route and turn-by-turn directions.

What's next?

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

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