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<!DOCTYPE html>
<html lang="en">
<title>Calculate a Simple Isochrone - Azure Maps Web SDK Samples</title>
<meta charset="utf-8" />
<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 calculate an isochrone (drive time polygon) using the Azure Maps Route Reachable Range service and display it on the map. " />
<meta name="keywords" content="Microsoft maps, map, gis, API, SDK, REST, service, directions, route, routing, isochrone, isodistance, drive time polygon, reachable range" />
<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>
<script type='text/javascript'>
var map, datasource;
var reachableRangeUrlTemplate = '{subscription-key}&api-version=1.0&query={lat},{lon}&timeBudgetInSec={time}&view=Auto';
function GetMap() {
//Point the Azure Maps domain to the US Azure Gov Cloud domain.
//Initialize a map instance.
map = new atlas.Map('myMap', {
center: [-0.113042, 51.511859],
zoom: 12,
view: 'Auto',
//Add your Azure Maps subscription key to the map SDK. Get an Azure Maps key at
authOptions: {
authType: 'subscriptionKey',
subscriptionKey: '<Your Azure Maps Key>'
//Wait until the map resources are ready.'ready', function () {
//Create a data source and add it to the map.
datasource = new atlas.source.DataSource();
//Add layers to the map to render the data.
//Createa polygon layer to render the isochrone.
new atlas.layer.PolygonLayer(datasource, null, {
fillColor: 'rgba(255,0,0,0.4)'
//Create a symbol layer to render the center point.
new atlas.layer.SymbolLayer(datasource, null, {
filter: ['any', ['==', ['geometry-type'], 'Point'], ['==', ['geometry-type'], 'MultiPoint']] //Only render Point or MultiPoints in this layer.
//Calculate a 15 minute isochrone from the center of the map. Note that we have to convert 15 minutes to seconds.
getIsochrone(map.getCamera().center, 15 * 60);
function getIsochrone(center, timeInSeconds) {
//Create the URL request to the reachable range service.
var request = reachableRangeUrlTemplate
.replace('{subscription-key}', atlas.getSubscriptionKey())
.replace('{lat}', center[1])
.replace('{lon}', center[0])
.replace('{time}', timeInSeconds);
//Proces the request.
.then(function (response) {
return response.json();
}).then(function (response) {
if (response.reachableRange) {
//Convert the response into GeoJSON and add it to the map.
var positions = (latLng) {
return [latLng.longitude, latLng.latitude];
var isochrone = new[positions]);
var centerPoint = new[,
//Add the data to the data source.
} else {
alert('Unable to calculate an isochrone.')
<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><h1 style="font-size:16px">Calculate a Simple Isochrone</h1></legend>
This sample shows how to calculate a simple isochrone (drive time polygon) using the Azure Maps
<a href="" target="_blank">Route Reachable Range service</a> and display it on the map.
This sample calculates an isochrone for driving 15 minutes from a point near the center of London, UK.
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