Samples/Heat Map Layer/Simple Heat Map Layer/Simple Heat Map Layer.html

﻿<!DOCTYPE html>
<html lang="en">
<head>
    <title>Simple Heat Map Layer - 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 create a simple heat map from a data set of point features." />
    <meta name="keywords" content="Microsoft maps, map, gis, API, SDK, heatmap, heat map, heatmaps, heat maps, density, layer, thermatic, earthquakes, USGS" />
    <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', {
                view: 'Auto',

                //Add authentication details for connecting to Azure Maps.
                authOptions: {
                    //Use Microsoft Entra ID authentication.
                    authType: 'anonymous',
                    clientId: 'e6b6ab59-eb5d-4d25-aa57-581135b927f0', //Your Azure Maps client id for accessing your Azure Maps account.
                    getToken: function (resolve, reject, map) {
                        //URL to your authentication service that retrieves an Microsoft Entra ID Token.
                        var tokenServiceUrl = 'https://samples.azuremaps.com/api/GetAzureMapsToken';

                        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);

                //Load a data set of points, in this case earthquake data from the USGS.
                datasource.importDataFromUrl('https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_week.geojson');

                //Create a heatmap and add it to the map.
                map.layers.add(new atlas.layer.HeatMapLayer(datasource, null, {
                    radius: 10,
                    opacity: 0.8
                }), 'labels');
            });
        }
    </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>Simple Heat Map Layer</legend>
        This sample shows how to create a simple heat map from a data set of point features.
        In this sample each heat point will has a radius of 10 pixels at all zoom levels.
        The data in this sample is  sourced from the 
        <a href="https://earthquake.usgs.gov/" target="_blank">USGS Earthquake Hazards Program</a> 
        and consists of points that represents significant earthquakes that have occurred in the last 30 days.
    </fieldset>
</body>
</html>