Styling heatmaps
Custom styling of heatmap gradients with the L.heat options. More information about Feature Layers can be found in the L.esri.FeatureLayer documentation.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Styling heatmaps</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<!-- Load Leaflet from CDN -->
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css"
integrity="sha512-xodZBNTC5n17Xt2atTPuE1HxjVMSvLVW9ocqUKLsCC5CXdbqCmblAshOMAS6/keqq/sMZMZ19scR4PsZChSR7A=="
crossorigin=""/>
<script src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js"
integrity="sha512-XQoYMqMTK8LvdxXYG3nZ448hOEQiglfqkJs1NOQV44cWnUrBc8PkAOcXy20w0vlaXaVUearIOBhiXZ5V3ynxwA=="
crossorigin=""></script>
<!-- Load Esri Leaflet from CDN -->
<script src="https://unpkg.com/esri-leaflet@3.0.4/dist/esri-leaflet.js"
integrity="sha512-oUArlxr7VpoY7f/dd3ZdUL7FGOvS79nXVVQhxlg6ij4Fhdc4QID43LUFRs7abwHNJ0EYWijiN5LP2ZRR2PY4hQ=="
crossorigin=""></script>
<!-- Load Esri Leaflet Vector from CDN -->
<script src="https://unpkg.com/esri-leaflet-vector@3.1.1/dist/esri-leaflet-vector.js"
integrity="sha512-7rLAors9em7cR3/583gZSvu1mxwPBUjWjdFJ000pc4Wpu+fq84lXF1l4dbG4ShiPQ4pSBUTb4e9xaO6xtMZIlA=="
crossorigin=""></script>
<style>
body { margin:0; padding:0; }
#map { position: absolute; top:0; bottom:0; right:0; left:0; }
</style>
</head>
<body>
<!-- Include Leaflet.heat from CDN -->
<script src="https://unpkg.com/leaflet.heat@0.2.0/dist/leaflet-heat.js"></script>
<!-- Load Heatmap Feature Layer from CDN -->
<script src="https://unpkg.com/esri-leaflet-heatmap@2.0.0"></script>
<div id="map"></div>
<script>
var map = L.map('map', {
maxZoom: 16 // the heatmap plugin needs some help understanding the map's maxZoom
}).setView([41.759, -88.157], 12);
L.esri.Vector.vectorBasemapLayer('ArcGIS:LightGray', {
apikey: apiKey // Replace with your API key - https://developers.arcgis.com
}).addTo(map);
// new constructor syntax at 2.0.0
L.esri.Heat.featureLayer({
url: 'https://sampleserver6.arcgisonline.com/arcgis/rest/services/CommunityAddressing/MapServer/0',
radius: 10,
gradient: {
0.2: '#ffffb2',
0.4: '#fd8d3c',
0.6: '#fd8d3c',
0.8: '#f03b20',
1: '#bd0026'
}
}).addTo(map);
</script>
</body>
</html>