AzureMapsCodeSamples/Samples/Services Module/Calculate spaced positions along route/Calculate spaced positions along route.html at main · Azure-Samples/AzureMapsCodeSamples · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <title>Calculate spaced positions along route - Azure Maps Web SDK Samples</title>

    <meta charset="utf-8" />
	<link rel="shortcut icon" href="/favicon.ico"/>

    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
    <meta name="description" content="This sample shows how to calculate a evenly spaced out positions along a route, in this case every 10 kilometers." />
    <meta name="keywords" content="Microsoft maps, map, gis, API, SDK, services, module, route, directions" />
    <meta name="author" content="Microsoft Azure Maps" /><meta name="version" content="1.0" />
    <meta name="screenshot" content="screenshot.jpg" />

    <!-- Add references to the Azure Maps Map control JavaScript and CSS files. -->
    <link href="https://atlas.microsoft.com/sdk/javascript/mapcontrol/3/atlas.min.css" rel="stylesheet" />
    <script src="https://atlas.microsoft.com/sdk/javascript/mapcontrol/3/atlas.min.js"></script>

    <!-- Add a reference to the Azure Maps Services Module JavaScript file. -->
    <script src="https://atlas.microsoft.com/sdk/javascript/service/2/atlas-service.min.js"></script>

    <script>
        var map, datasource, routeURL;

        var stepDistance = 10; //The distance in KM along the route to retrieve locations.

        function getMap() {
            //Initialize a map instance.
            map = new atlas.Map('myMap', {
                center: [-122.335, 47.608],
                zoom: 15,
                view: 'Auto',
                language: 'Auto',

                //Add authentication details for connecting to Azure Maps.
                authOptions: {
                    // Use SAS token for authentication
                    authType: 'sas',
                    getToken: function (resolve, reject, map) {
                        // URL to your authentication service that retrieves a SAS Token
                        var tokenServiceUrl = 'https://samples.azuremaps.com/api/GetAzureMapsSasToken';

                        fetch(tokenServiceUrl).then(r => r.text()).then(token => resolve(token));
                    }

                    //Alternatively, use an Azure Maps key. Get an Azure Maps key at https://azure.com/maps. NOTE: The primary key should be used as the key.
                    //authType: 'subscriptionKey',
                    //subscriptionKey: '[YOUR_AZURE_MAPS_KEY]'
                }
            });

            //Use MapControlCredential to share authentication between a map control and the service module.
            var pipeline = atlas.service.MapsURL.newPipeline(new atlas.service.MapControlCredential(map));

            //Construct the RouteURL object
            routeURL = new atlas.service.RouteURL(pipeline);

            //Wait until the map resources are ready.
            map.events.add('ready', function () {
                datasource = new atlas.source.DataSource();
                map.sources.add(datasource);

                //Create the GeoJSON objects which represent the start and end points of the route.
                var startPoint = new atlas.data.Feature(new atlas.data.Point([-122.33028, 47.60323]), {
                    title: "Seattle",
                    icon: "pin-round-blue"
                });

                var endPoint = new atlas.data.Feature(new atlas.data.Point([-122.124, 47.67491]), {
                    title: "Redmond",
                    icon: "pin-blue"
                });

                //Add the data to the data source.
                datasource.add([startPoint, endPoint]);

                //Create a layer for rendering the route line under the road labels.
                map.layers.add(new atlas.layer.LineLayer(datasource, null, {
                    strokeColor: '#2272B9',
                    strokeWidth: 5,
                    lineJoin: 'round',
                    lineCap: 'round'
                }), 'labels');

                //Create a layer for rendering the start and end points of the route as symbols.
                map.layers.add(new atlas.layer.SymbolLayer(datasource, null, {
                    iconOptions: {
                        image: ['get', 'icon'],
                        allowOverlap: true,
                        ignorePlacement: true
                    },
                    textOptions: {
                        textField: ['get', 'title'],
                        offset: [0, 1.2]
                    },
                    filter: ['any', ['==', ['geometry-type'], 'Point'], ['==', ['geometry-type'], 'MultiPoint']] //Only render Point or MultiPoints in this layer.
                }));

                //Get the coordnates of the start and end points.
                var coordinates = [
                    startPoint.geometry.coordinates,
                    endPoint.geometry.coordinates
                ];

                //Calculate a route.
                routeURL.calculateRouteDirections(atlas.service.Aborter.timeout(10000), coordinates).then((directions) => {
                    //Get the route data as GeoJSON and add it to the data source.
                    var data = directions.geojson.getFeatures();
                    datasource.add(data);

                    //Update the map view to center over the route.
                    map.setCamera({
                        bounds: data.bbox,
                        padding: 30 //Add a padding to account for the pixel size of symbols.
                    });

                    var path = [];

                    //Get all points along the path. The route line could be a LineString or MultiLineString.
                    if (data.features[0].geometry.type === 'LineString') {
                        path = data.features[0].geometry.coordinates;
                    } else if (data.features[0].geometry.type === 'MultiLineString') {
                        data.features[0].geometry.coordinates.forEach(c => {
                            path = path.concat(c);
                        });
                    }

                    //Create an array to store the calculated positions, add the starting location.
                    var positionsAlongPath = [path[0]];

                    //Calculate the length of the route.
                    var routeLength = atlas.math.getLengthOfPath(path, 'kilometers');

                    var numSteps = Math.floor(routeLength / stepDistance);
                    var loc;

                    for (var i = 1; i <= numSteps; i++) {
                        loc = atlas.math.getPositionAlongPath(path, stepDistance * i, 'kilometers');
                        positionsAlongPath.push(loc);
                    }

                    //Add the last location on the path.
                    positionsAlongPath.push(path[path.length - 1]);

                    //Do something with the calculated locations. Lets show red markers for now.
                    for (var i = 0, len = positionsAlongPath.length; i < len; i++) {
                        datasource.add(new atlas.data.Feature(new atlas.data.Point(positionsAlongPath[i]), { icon: 'marker-red' }))
                    }
                });
            });
        }
    </script>
</head>
<body onload="getMap()">
    <div id="myMap" style="position:relative;width:100%;min-width:290px;height:600px;"></div>

    <fieldset style="width:calc(100% - 30px);min-width:290px;margin-top:10px;">
        <legend>Calculate spaced positions along route</legend>
        This sample shows how to calculate a spaced out positions along a route, in this case every 10 kilometers.
    </fieldset>
</body>
</html>