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HTML

              
                <!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <meta
      name="viewport"
      content="initial-scale=1,maximum-scale=1,user-scalable=no"
    />
    <title>RouteTask - 4.13</title>
    <style>
      html,
      body,
      #viewDiv {
        padding: 0;
        margin: 0;
        height: 100%;
        width: 100%;
      }

      #paneDiv {
        position: absolute;
        top: 10px;
        left: 62px;
        padding: 0 12px 0 12px;
        background-color: rgba(0, 0, 0, 0.5);
        color: white;
      }
    </style>

    <link
      rel="stylesheet"
      href="https://js.arcgis.com/4.13/esri/themes/light/main.css"
    />
    <script src="https://js.arcgis.com/4.13/"></script>

    <script>
      require([
        "esri/Map",
        "esri/views/MapView",
        "esri/Graphic",
        "esri/layers/GraphicsLayer",
        "esri/tasks/RouteTask",
        "esri/tasks/support/RouteParameters",
        "esri/tasks/support/FeatureSet"
      ], function(
        Map,
        MapView,
        Graphic,
        GraphicsLayer,
        RouteTask,
        RouteParameters,
        FeatureSet
      ) {
        // Point the URL to a valid route service that uses an
        // ArcGIS Online hosted service proxy
        var routeTask = new RouteTask({
          url:
            "https://route.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World"
        });

        // The stops and route result will be stored in this layer
        var routeLayer = new GraphicsLayer();

        // Setup the route parameters
        var routeParams = new RouteParameters({
          stops: new FeatureSet(),
          outSpatialReference: {
            // autocasts as new SpatialReference()
            wkid: 3857
          }
        });

        // Define the symbology used to display the stops
        var stopSymbol = {
          type: "simple-marker", // autocasts as new SimpleMarkerSymbol()
          style: "cross",
          size: 15,
          outline: {
            // autocasts as new SimpleLineSymbol()
            width: 4
          }
        };

        // Define the symbology used to display the route
        var routeSymbol = {
          type: "simple-line", // autocasts as SimpleLineSymbol()
          color: [0, 0, 255, 0.5],
          width: 5
        };

        var map = new Map({
          basemap: "streets",
          layers: [routeLayer] // Add the route layer to the map
        });
        var view = new MapView({
          container: "viewDiv", // Reference to the scene div created in step 5
          map: map, // Reference to the map object created before the scene
          center:  [-3.1810, 51.4812],
          zoom: 14
        });

        // Adds a graphic when the user clicks the map. If 2 or more points exist, route is solved.
        view.on("click", addStop);

        function addStop(event) {
          // Add a point at the location of the map click
          var stop = new Graphic({
            geometry: event.mapPoint,
            symbol: stopSymbol
          });
          routeLayer.add(stop);

          // Execute the route task if 2 or more stops are input
          routeParams.stops.features.push(stop);
          if (routeParams.stops.features.length >= 2) {
            routeTask.solve(routeParams).then(showRoute);
          }
        }
        // Adds the solved route to the map as a graphic
        function showRoute(data) {
          var routeResult = data.routeResults[0].route;
          routeResult.symbol = routeSymbol;
          routeLayer.add(routeResult);
        }
      });
    </script>
  </head>
  <body>
    <div id="viewDiv"></div>
    <div id="paneDiv" class="esri-widget">
      <div>
        <p>
          Click on the map to add stops to the route. The route from the last
          stop to the newly added stop is calculated. If a stop is not
          reachable, it is removed and the last valid point is set as the
          starting point.
        </p>
      </div>
    </div>
  </body>
</html>

              
            
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