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<html lang="en">
<title>Travel time analysis of multiple locations - 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 add calculate travel times areas for multiple points, and then spatially join these travel time polygons with a secondary set of points to calculate aggregates." />
<meta name="keywords" content="Microsoft maps, map, gis, API, SDK, spatial analysis, spatial join, travel time, isochrone, route range, within, intersects, intersection, temporal, temporal analysis" />
<meta name="author" content="Microsoft Azure Maps" />
<!-- Add references to the Azure Maps Map control JavaScript and CSS files. -->
<link rel="stylesheet" href="" type="text/css" />
<script src=""></script>
<!-- Add a reference to the Azure Maps Services Module JavaScript file. -->
<script src=""></script>
<!-- Add reference to the Azure Maps Spatial IO module. -->
<script src=""></script>
<!-- Load turf.js a spatial math library. -->
<script src='/Common/scripts/turf.min.js'></script>
<script type='text/javascript'>
var map, datasource, routeURL, layer;
var policeStationsUrl = '../Common/data/SpatialCSV/Chicago_Police_Stations.csv';
var bikeRacksUrl = '../Common/data/SpatialCSV/Chicago_Bike_Racks.csv';
function GetMap() {
//Point the Azure Maps domain to the US Azure Gov Cloud domain.
//Initialize a map instance.
map = new atlas.Map('myMap', {
style: 'grayscale_light',
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 = '';
fetch(tokenServiceUrl).then(r => r.text()).then(token => resolve(token));
//Alternatively, use an Azure Maps key. Get an Azure Maps key at 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 and point to the US Azure Gov Cloud domain.
routeURL = new atlas.service.RouteURL(pipeline, '');
//Wait until the map resources are ready.'ready', function () {
//Create a popup but leave it closed so we can update it and display it later.
popup = new atlas.Popup();
//Create a data source ad add it to the map.
datasource = new atlas.source.DataSource();
//Add a simple data layer for rendering the data.
layer = new atlas.layer.PolygonLayer(datasource, null, {
fillColor: [
['get', 'totalBikeRacks'],
1, '#f0f9e8',
2, '#bae4bc',
3, '#7bccc4',
4, '#43a2ca',
5, '#0868ac'
fillOpacity: 0.8
map.layers.add(layer, 'labels');
//Add a click event to the layers.'click', layer, showPopup);
map.layers.add(new atlas.layer.LineLayer(datasource, null, {
strokeColor: 'black'
//Add a bubble layer for displaying police stations.
map.layers.add(new atlas.layer.BubbleLayer(datasource, null, {
filter: ['==', ['geometry-type'], 'Point']
document.getElementById('statusPanel').innerHTML = '<br/>Downloading data...';
//Download the police station and crime data in parrallel.
]).then(function (values) {
var stations = values[0];
var bikeRacks = values[1];
//Update map view to display the area of bike racks.
bounds: bikeRacks.bbox
//Add the police station data to the map.
var routeRangePromises = [];
//Calculate the travel time polygons from each station.
for (var i = 0; i < stations.features.length; i++) {
routeRangePromises.push(routeURL.calculateRouteRange(atlas.service.Aborter.timeout(10000), stations.features[i].geometry.coordinates, {
travelMode: 'pedestrian',
timeBudgetInSec: 5 * 60 //5 minutes.
Promise.all(routeRangePromises).then(values => {
var isochrones = [];
for (var i = 0; i < values.length; i++) {
var data = values[i].geojson.getFeatures();
//Copy the properties of the police station to the travel time polygon.
data.features[0].properties = stations.features[i].properties;
//Spatially join the bike rack data with each travel time polygon, then use the total number of bike racks as the aggregate.
var ptsWithin = turf.pointsWithinPolygon(bikeRacks, data.features[0]);
data.features[0].properties.totalBikeRacks = ptsWithin.features.length;
//The first feature is the polygon, the second is the origin point which we can leave out.
//Close the polygon.
document.getElementById('statusPanel').innerHTML = '';
function showPopup(e) {
if (e.shapes && e.shapes.length > 0) {
var properties = e.shapes[0].getProperties();
//Update the content of the popup.
content: atlas.PopupTemplate.applyTemplate(properties, {
title: '{totalBikeRacks} bike racks'
//Update the position of the popup.
position: (e.shapes[0].getType() === 'Point') ? e.shapes[0].getCoordinates() : e.position
//Open the popup.;
#myMap {
position: relative;
width: 100%;
min-width: 290px;
height: 600px;
.legend {
font-family: Arial;
font-size: 12px;
position: absolute;
top: 480px;
background-color: #fff;
padding: 5px;
border-radius: 5px;
.legend i {
width: 12px;
height: 12px;
float: left;
margin-right: 8px;
opacity: 0.7;
<body onload="GetMap()">
<div id="myMap"></div>
<div class="legend" style="left: 15px;">
<b>Number of Bike Racks</b>
<tr><td><i style='background:#0868ac' /></td><td>5+</td></tr>
<tr><td><i style='background:#43a2ca' /></td><td>4</td></tr>
<tr><td><i style='background:#7bccc4' /></td><td>3</td></tr>
<tr><td><i style='background:#bae4bc' /></td><td>2</td></tr>
<tr><td><i style='background:#f0f9e8' /></td><td>1</td></tr>
<div id="statusPanel"></div>
<fieldset style="width:calc(100% - 30px);min-width:290px;margin-top:10px;">
<legend><h1 style="font-size:16px">Travel time analysis of multiple locations</h1></legend>
This sample shows how to add calculate travel times areas for multiple points, and then spatially join these travel time polygons with a secondary set of points to calculate aggregates.
This sample uses the Azure Maps Route Range service to calculate a 5 minute pedestrian (walking) travel time around police stations in Chicago, and then joins it with the location of bike racks.
This analysis tells us how many bike racks are within a 5 minute walk of a police station in Chicago.
This sample uses the open source <a href="" target="_blank">Turf.js</a> library to for some of the spatial calculation.