Get closest point to geometry.html

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Get closest point to geometry - Azure Maps Web SDK Samples</title>

    <meta charset="utf-8" />
	<link rel="shortcut icon" href="/favicon.ico"/>
    <meta http-equiv="x-ua-compatible" content="IE=Edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
    <meta name="description" content="This sample shows how to get the closest point on a geometry from another point or position."/>
    <meta name="keywords" content="Microsoft maps, map, gis, API, SDK, geospatial, spatial math, math" />
    <meta name="author" content="Microsoft Azure Maps" />

    <!-- Add references to the Azure Maps Map control JavaScript and CSS files. -->
    <link rel="stylesheet" href="https://atlas.microsoft.com/sdk/javascript/mapcontrol/2/atlas.min.css" type="text/css" />
    <script src="https://atlas.microsoft.com/sdk/javascript/mapcontrol/2/atlas.min.js"></script>

    <script type='text/javascript'>
        var map, datasource, sampleLine, dragMarker, snapMarker, shortestLine;

        function GetMap() {
            //Point the Azure Maps domain to the US Azure Gov Cloud domain.
			atlas.setDomain('atlas.azure.us');

			//Initialize a map instance.
            map = new atlas.Map('myMap', {
                center: [-122.32, 47.6],
                zoom: 12,
                view: 'Auto',

                //Add authentication details for connecting to Azure Maps.
                authOptions: {
                    //Use Azure Active Directory authentication.
                    authType: 'anonymous',
                    clientId: 'c9f2f391-13f1-407b-a4a5-f0a241bacfbf', //Your Azure Active Directory client id for accessing your Azure Maps account.
                    getToken: function (resolve, reject, map) {
                        //URL to your authentication service that retrieves an Azure Active Directory Token.
                        var tokenServiceUrl = 'https://azuremapscodesamples.azurewebsites.us/Common/TokenService.ashx';

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

                //Create a sample line to snap to and add it to the data source.
                sampleLine = new atlas.data.LineString([
                    [-122.3682, 47.6364], [-122.3458, 47.6148], [-122.3116, 47.6200], [-122.3188, 47.6099],
                    [-122.3408, 47.6041], [-122.3274, 47.6271], [-122.2800, 47.6193], [-122.3111, 47.5903],
                    [-122.3399, 47.5799], [-122.2900, 47.5781], [-122.2975, 47.5985], [-122.2742, 47.6072]]);

                datasource.add(new atlas.data.Feature(sampleLine, {
                    color: 'blue'
                }));

                //Create a layer to render line data and add it to the map.
                map.layers.add(new atlas.layer.LineLayer(datasource, null, {
                    strokeColor: ['get', 'color'],
                    strokeWidth: 3
                }));

                //Create a red snap marker to show the point on the geometry.
                snapMarker = new atlas.HtmlMarker({
                    position: map.getCamera().center,
                    color: 'red'
                });
                map.markers.add(snapMarker);

                //Create a green drag marker to be the point neat a geometry.
                dragMarker = new atlas.HtmlMarker({
                    position: map.getCamera().center,
                    draggable: true,
                    color: 'green'
                });
                map.markers.add(dragMarker);

                //Add a drag event to the marker.
                map.events.add('drag', dragMarker, getClosestPoint);

                //Calculate the closest point.
                getClosestPoint();
            });
        }

        function getClosestPoint() {
            //Calculate the closest point on the geometry.
            var p = atlas.math.getClosestPointOnGeometry(dragMarker.getOptions().position, sampleLine);

            if (p) {
                //Update the position of the red snap marker.
                snapMarker.setOptions({ position: p.geometry.coordinates });

                //Create a line to show the shortest path between the green drag marker and the red snap marker.
                var path = [dragMarker.getOptions().position, p.geometry.coordinates];

                if (!shortestLine) {
                    shortestLine = new atlas.Shape(new atlas.data.LineString(path), null, {
                        color: 'red'
                    });
                    datasource.add(shortestLine);
                } else {
                    shortestLine.setCoordinates(path);
                }

                //Display the distance between the two markers.
                document.getElementById('distancePanel').innerText = 'Distance: ' + p.properties.distance + 'm';
            }
        }
    </script>
</head>
<body onload="GetMap()">
    <div id="myMap" style="position:relative;width:100%;min-width:290px;height:600px;"></div>

    <div id="distancePanel" style="position:absolute;top:10px;left:10px;background-color:#fff;padding:10px;border-radius:20px;"></div>

    <fieldset style="width:calc(100% - 30px);min-width:290px;margin-top:10px;">
        <legend><h1 style="font-size:16px">Get closest point to geometry</h1></legend>
        This sample shows how to get the closest point on a geometry from another point or position.
        Drag the green marker to see the calculation update.
    </fieldset>
</body>
</html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<title>Get closest point to geometry - Azure Maps Web SDK Samples</title>

	<meta charset="utf-8" />
	<link rel="shortcut icon" href="/favicon.ico"/>
	<meta http-equiv="x-ua-compatible" content="IE=Edge" />
	<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
	<meta name="description" content="This sample shows how to get the closest point on a geometry from another point or position."/>
	<meta name="keywords" content="Microsoft maps, map, gis, API, SDK, geospatial, spatial math, math" />
	<meta name="author" content="Microsoft Azure Maps" />

	<!-- Add references to the Azure Maps Map control JavaScript and CSS files. -->
	<link rel="stylesheet" href="https://atlas.microsoft.com/sdk/javascript/mapcontrol/2/atlas.min.css" type="text/css" />
	<script src="https://atlas.microsoft.com/sdk/javascript/mapcontrol/2/atlas.min.js"></script>

	<script type='text/javascript'>
	var map, datasource, sampleLine, dragMarker, snapMarker, shortestLine;

	function GetMap() {
	//Point the Azure Maps domain to the US Azure Gov Cloud domain.
	atlas.setDomain('atlas.azure.us');

	//Initialize a map instance.
	map = new atlas.Map('myMap', {
	center: [-122.32, 47.6],
	zoom: 12,
	view: 'Auto',

	//Add authentication details for connecting to Azure Maps.
	authOptions: {
	//Use Azure Active Directory authentication.
	authType: 'anonymous',
	clientId: 'c9f2f391-13f1-407b-a4a5-f0a241bacfbf', //Your Azure Active Directory client id for accessing your Azure Maps account.
	getToken: function (resolve, reject, map) {
	//URL to your authentication service that retrieves an Azure Active Directory Token.
	var tokenServiceUrl = 'https://azuremapscodesamples.azurewebsites.us/Common/TokenService.ashx';

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

	//Create a sample line to snap to and add it to the data source.
	sampleLine = new atlas.data.LineString([
	[-122.3682, 47.6364], [-122.3458, 47.6148], [-122.3116, 47.6200], [-122.3188, 47.6099],
	[-122.3408, 47.6041], [-122.3274, 47.6271], [-122.2800, 47.6193], [-122.3111, 47.5903],
	[-122.3399, 47.5799], [-122.2900, 47.5781], [-122.2975, 47.5985], [-122.2742, 47.6072]]);

	datasource.add(new atlas.data.Feature(sampleLine, {
	color: 'blue'
	}));

	//Create a layer to render line data and add it to the map.
	map.layers.add(new atlas.layer.LineLayer(datasource, null, {
	strokeColor: ['get', 'color'],
	strokeWidth: 3
	}));

	//Create a red snap marker to show the point on the geometry.
	snapMarker = new atlas.HtmlMarker({
	position: map.getCamera().center,
	color: 'red'
	});
	map.markers.add(snapMarker);

	//Create a green drag marker to be the point neat a geometry.
	dragMarker = new atlas.HtmlMarker({
	position: map.getCamera().center,
	draggable: true,
	color: 'green'
	});
	map.markers.add(dragMarker);

	//Add a drag event to the marker.
	map.events.add('drag', dragMarker, getClosestPoint);

	//Calculate the closest point.
	getClosestPoint();
	});
	}

	function getClosestPoint() {
	//Calculate the closest point on the geometry.
	var p = atlas.math.getClosestPointOnGeometry(dragMarker.getOptions().position, sampleLine);

	if (p) {
	//Update the position of the red snap marker.
	snapMarker.setOptions({ position: p.geometry.coordinates });

	//Create a line to show the shortest path between the green drag marker and the red snap marker.
	var path = [dragMarker.getOptions().position, p.geometry.coordinates];

	if (!shortestLine) {
	shortestLine = new atlas.Shape(new atlas.data.LineString(path), null, {
	color: 'red'
	});
	datasource.add(shortestLine);
	} else {
	shortestLine.setCoordinates(path);
	}

	//Display the distance between the two markers.
	document.getElementById('distancePanel').innerText = 'Distance: ' + p.properties.distance + 'm';
	}
	}
	</script>
	</head>
	<body onload="GetMap()">
	<div id="myMap" style="position:relative;width:100%;min-width:290px;height:600px;"></div>

	<div id="distancePanel" style="position:absolute;top:10px;left:10px;background-color:#fff;padding:10px;border-radius:20px;"></div>

	<fieldset style="width:calc(100% - 30px);min-width:290px;margin-top:10px;">
	<legend><h1 style="font-size:16px">Get closest point to geometry</h1></legend>
	This sample shows how to get the closest point on a geometry from another point or position.
	Drag the green marker to see the calculation update.
	</fieldset>
	</body>
	</html>