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 Routing 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 will 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

Create a new pen

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

Get an access token

You need an access token with the correct privileges to access the location services 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 > Geocoding
     • Location services > Routing
2. In CodePen, set esriConfig.apiKey to your API key..
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   esriConfig.apiKey = "YOUR_ACCESS_TOKEN";
   const map = new Map({
     basemap: "arcgis/topographic" // basemap styles service
   });

To learn about other ways to get an access token, go to Types of authentication.

Add modules

1. In the require statement, add the Graphic, route, RouteParameters, and FeatureSet modules.

   More info

   The ArcGIS Maps SDK for JavaScript is available as AMD modules and ES modules, but this tutorial is based on AMD. The AMD require function uses references to determine which modules will be loaded – for example, you can specify "esri/Map" for loading the Map module. After the modules are loaded, they are passed as parameters (e.g. Map) to the callback function where they can be used in your application. It is important to keep the module references and callback parameters in the same order. To learn more about the API's different modules visit the Overview Guide page.

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       require([
         "esri/config",
         "esri/Map",
         "esri/views/MapView",
   
         "esri/Graphic",
         "esri/rest/route",
         "esri/rest/support/RouteParameters",
         "esri/rest/support/FeatureSet"
   
       ], function(esriConfig, Map, MapView, Graphic, route, RouteParameters, FeatureSet) {
   

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Update the map

A streets basemap layer is typically used in routing applications. Update the basemap property to use the arcgis/navigation basemap layer and change the position of the map to center on Los Angeles.

1. Update the basemap property to arcgis/navigation.

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       ], function(esriConfig, Map, MapView, Graphic, route, RouteParameters, FeatureSet) {
   
       esriConfig.apiKey = "YOUR_ACCESS_TOKEN";
   
       const map = new Map({
         basemap: "arcgis/navigation" // basemap styles service
       });
   

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2. Update the center property to -118.24532,34.05398 and set the zoom property to 12 to center on Los Angeles.

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       esriConfig.apiKey = "YOUR_ACCESS_TOKEN";
   
       const map = new Map({
         basemap: "arcgis/navigation" // basemap styles service
       });
   
       const view = new MapView({
         container: "viewDiv",
         map: map,
         center: [-118.24532,34.05398], //Longitude, latitude
         zoom: 12
       });
   

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Define the service url

The rest module makes a request to a service and returns the results. Use the route module to access the Routing service.

1. Create a variable called routeUrl to reference the route service.
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       const view = new MapView({
         container: "viewDiv",
         map: map,
         center: [-118.24532,34.05398], //Longitude, latitude
         zoom: 12
       });
   
       const routeUrl = "https://route-api.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World";
   

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Get an origin and destination

A route module uses a stops parameter to find a route. Stops are graphics that represent the origin and destination locations for a route. Use a click handler in the View to add graphics when the map is clicked. The graphics will define the stops for the route.

1. Add a click handler to add graphics to the view.

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       const routeUrl = "https://route-api.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World";
   
       view.on("click", function(event){
   
       });
   

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2. Create an addGraphic function to display a white marker for the origin location and a black marker for the destination. Add the graphic to the view.

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       view.on("click", function(event){
   
       });
   
       function addGraphic(type, point) {
         const graphic = new Graphic({
           symbol: {
             type: "simple-marker",
             color: (type === "origin") ? "white" : "black",
             size: "8px"
           },
           geometry: point
         });
         view.graphics.add(graphic);
       }
   

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3. Update the click handler to reference the addGraphic function. The first click will create the origin and the second will create the destination. Subsequent clicks will clear the graphics to define a new origin and destination.

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       view.on("click", function(event){
   
         if (view.graphics.length === 0) {
           addGraphic("origin", event.mapPoint);
         } else if (view.graphics.length === 1) {
           addGraphic("destination", event.mapPoint);
   
         } else {
           view.graphics.removeAll();
           addGraphic("origin",event.mapPoint);
         }
   
       });
   

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4. Click on the map twice to ensure the graphics are created.

Find the route

To solve the route, add the origin and destination graphics to the stops parameter as a FeatureSet and then use the solve method. The resulting route will be added to the map as a Graphic.

1. Create a getRoute function to add RouteParameters and pass in the point graphics.

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       function addGraphic(type, point) {
         const graphic = new Graphic({
           symbol: {
             type: "simple-marker",
             color: (type === "origin") ? "white" : "black",
             size: "8px"
           },
           geometry: point
         });
         view.graphics.add(graphic);
       }
   
       function getRoute() {
         const routeParams = new RouteParameters({
           stops: new FeatureSet({
             features: view.graphics.toArray()
           }),
   
         });
   
       }
   

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2. Call the solve method to get the route. When the method returns, get the route from routeResults and add it to the view as a Graphic with a blue line.

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       function getRoute() {
         const routeParams = new RouteParameters({
           stops: new FeatureSet({
             features: view.graphics.toArray()
           }),
   
         });
   
         route.solve(routeUrl, routeParams)
           .then(function(data) {
             data.routeResults.forEach(function(result) {
               result.route.symbol = {
                 type: "simple-line",
                 color: [5, 150, 255],
                 width: 3
               };
               view.graphics.add(result.route);
             });
   
           })
   
       }
   

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3. Update the click handler with the getRoute function after the second graphic is passed in (destination).

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       view.on("click", function(event){
   
         if (view.graphics.length === 0) {
           addGraphic("origin", event.mapPoint);
         } else if (view.graphics.length === 1) {
           addGraphic("destination", event.mapPoint);
   
           getRoute(); // Call the route service
   
         } else {
           view.graphics.removeAll();
           addGraphic("origin",event.mapPoint);
         }
   
       });
   

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4. Click two locations on the map to display a route.

Get directions

You can get driving directions from the route service with the returnDirections property on RouteParameters. Use this property to return directions and add them to the map as HTML elements.

1. Go back to the getRoute function and set the returnDirections property to true.

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       function getRoute() {
         const routeParams = new RouteParameters({
           stops: new FeatureSet({
             features: view.graphics.toArray()
           }),
   
           returnDirections: true
   
         });
   
         route.solve(routeUrl, routeParams)
           .then(function(data) {
             data.routeResults.forEach(function(result) {
               result.route.symbol = {
                 type: "simple-line",
                 color: [5, 150, 255],
                 width: 3
               };
               view.graphics.add(result.route);
             });
   
           })
   
       }
   

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2. After the solve method has resolved, create a directions ordered list element that will display if there are results returned to generate a route.

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         route.solve(routeUrl, routeParams)
           .then(function(data) {
             data.routeResults.forEach(function(result) {
               result.route.symbol = {
                 type: "simple-line",
                 color: [5, 150, 255],
                 width: 3
               };
               view.graphics.add(result.route);
             });
   
             // Display directions
            if (data.routeResults.length > 0) {
              const directions = document.createElement("ol");
              directions.classList = "esri-widget esri-widget--panel esri-directions__scroller";
              directions.style.marginTop = "0";
              directions.style.padding = "15px 15px 15px 30px";
              const features = data.routeResults[0].directions.features;
   
            }
   
           })
   
   

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3. Create a li element for each route feature to generate an ordered list of directions with their distances in miles. Append each direction to the directions element.

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             // Display directions
            if (data.routeResults.length > 0) {
              const directions = document.createElement("ol");
              directions.classList = "esri-widget esri-widget--panel esri-directions__scroller";
              directions.style.marginTop = "0";
              directions.style.padding = "15px 15px 15px 30px";
              const features = data.routeResults[0].directions.features;
   
              // Show each direction
              features.forEach(function(result,i){
                const direction = document.createElement("li");
                direction.innerHTML = result.attributes.text + " (" + result.attributes.length.toFixed(2) + " miles)";
                directions.appendChild(direction);
              });
   
            }
   

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4. For each new route created, remove all existing HTML elements from the view with the empty method. Add the direction element, with the directions as list items, to the top-right of the view.

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              // Show each direction
              features.forEach(function(result,i){
                const direction = document.createElement("li");
                direction.innerHTML = result.attributes.text + " (" + result.attributes.length.toFixed(2) + " miles)";
                directions.appendChild(direction);
              });
   
             view.ui.empty("top-right");
             view.ui.add(directions, "top-right");
   

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5. Add a catch statement to display any errors in the console.

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         route.solve(routeUrl, routeParams)
           .then(function(data) {
             data.routeResults.forEach(function(result) {
               result.route.symbol = {
                 type: "simple-line",
                 color: [5, 150, 255],
                 width: 3
               };
               view.graphics.add(result.route);
             });
   
             // Display directions
            if (data.routeResults.length > 0) {
              const directions = document.createElement("ol");
              directions.classList = "esri-widget esri-widget--panel esri-directions__scroller";
              directions.style.marginTop = "0";
              directions.style.padding = "15px 15px 15px 30px";
              const features = data.routeResults[0].directions.features;
   
              // Show each direction
              features.forEach(function(result,i){
                const direction = document.createElement("li");
                direction.innerHTML = result.attributes.text + " (" + result.attributes.length.toFixed(2) + " miles)";
                directions.appendChild(direction);
              });
   
             view.ui.empty("top-right");
             view.ui.add(directions, "top-right");
   
            }
   
           })
   
           .catch(function(error){
               console.log(error);
           })
   

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Run the App

In CodePen, run your code to display the map.

Click on the map twice to display the route directions. The map should support two clicks to create an origin and destination point and then use the route service to display the resulting route and turn-by-turn directions.

What's next?

Learn how to use additional API features and ArcGIS services in these tutorials:

• Search for an address
• Find service areas