AzureMapsCodeSamples/Samples/Spatial Math/Introduction to spatial math/Introduction to spatial math.html at main · Azure-Samples/AzureMapsCodeSamples · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <title>Introduction to Spatial Math - 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 use many of the built in spatial math functions in the Azure Maps web control." />
    <meta name="keywords" content="Microsoft maps, map, gis, API, SDK, geospatial, spatial math, math, haversine, heading, bearing" />
    <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>

    <script>
        var map, datasource;

        function getMap() {
            //Initialize a map instance.
            map = new atlas.Map('myMap', {
                center: [-100, 40],
                zoom: 3,
                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]'
                }
            });

            //Wait until the map resources are ready.
            map.events.add('ready', function () {

                //Create two test points.
                var startPosition = [-122.33, 47.6];
                var endPosition = [-80.225, 25.9];

                var startPoint = new atlas.data.Feature(new atlas.data.Point(startPosition), {
                    title: 'Start'
                });

                var endPoint = new atlas.data.Feature(new atlas.data.Point(endPosition), {
                    title: 'End'
                });

                //Calculate a geodesic path between the two points (line that follows curvature of the earth).
                var path = atlas.math.getGeodesicPath([startPosition, endPosition]);
                var poly = new atlas.data.LineString(path);

                //Calculate the midpoint of the line.
                var midPoint = atlas.math.interpolate(startPosition, endPosition);
                var pin = new atlas.data.Feature(new atlas.data.Point(midPoint), {
                    title: 'Midpoint'
                });

                //Calculate a location that is along the path 300 miles from the north west coordinate.
                var point300MilesFromNW = atlas.math.getPositionAlongPath(poly, 300, 'miles');
                var pin2 = new atlas.data.Feature(new atlas.data.Point(point300MilesFromNW), {
                    title: '300 miles from NW'
                });

                //Create a data source and add it to the map.
                datasource = new atlas.source.DataSource();
                map.sources.add(datasource);

                //Add the data to the data source.
                datasource.add([poly, startPoint, endPoint, pin, pin2]);

                map.layers.add([
                    //Add a layer for rendering line data.
                    new atlas.layer.LineLayer(datasource, null, {
                        strokeColor: 'purple',
                        strokeWidth: 4
                    }),

                    //Add a layer for rendering point data.
                    new atlas.layer.SymbolLayer(datasource, null, {
                        iconOptions: {
                            allowOverlap: true,
                            ignorePlacement: true
                        },
                        textOptions: {
                            textField: ['get', 'title'],
                            offset: [0, 1]
                        },
                        filter: ['any', ['==', ['geometry-type'], 'Point'], ['==', ['geometry-type'], 'MultiPoint']] //Only render Point or MultiPoints in this layer.
                    })
                ]);

                //Calculate the distance from the northWest coordinate to the southEast coordinate.
                var distance = atlas.math.getDistanceTo(startPosition, endPosition, 'miles');

                //Calculate the heading from the northWest coordinate to the southEast coordinate.
                var heading = atlas.math.getHeading(startPosition, endPosition);

                document.getElementById('outputPanel').innerHTML = 'Distance: ' + distance + ' miles<br/>Heading: ' + heading + ' degrees';
            });
        }
    </script>
</head>
<body onload="getMap()">
    <div id="myMap" style="position:relative;width:100%;min-width:290px;height:600px;"></div><br />
    <div id="outputPanel"></div>

    <fieldset style="width:calc(100% - 30px);min-width:290px;margin-top:10px;">
        <legend>Introduction to Spatial Math</legend>
        This sample shows how to use many of the built in spatial math functions in the Azure Maps web control.
    </fieldset>
</body>
</html>