Clustering points
Visualize dense services as clusters of points with the L.markercluster plugin. More information about Feature Layers can be found in the L.esri.Layers.FeatureLayer documentation.
<html>
<head>
<meta charset=utf-8 />
<title>Clustering points</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<!-- Load Leaflet from CDN-->
<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.css" />
<script src="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.js"></script>
<!-- Load Esri Leaflet from CDN -->
<script src="http://cdn-geoweb.s3.amazonaws.com/esri-leaflet/1.0.0-rc.2/esri-leaflet.js"></script>
<style>
body {margin:0;padding:0;}
#map {position: absolute;top:0;bottom:0;right:0;left:0;}
</style>
</head>
<body>
<!-- Include Leaflet.markercluster via rawgit.com, do not use in production -->
<link rel="stylesheet" type="text/css" href="https://cdn.rawgit.com/Leaflet/Leaflet.markercluster/v0.4.0/dist/MarkerCluster.Default.css">
<link rel="stylesheet" type="text/css" href="https://cdn.rawgit.com/Leaflet/Leaflet.markercluster/v0.4.0/dist/MarkerCluster.css">
<script src="https://cdn.rawgit.com/Leaflet/Leaflet.markercluster/v0.4.0/dist/leaflet.markercluster.js"></script>
<!-- Load Clustered Feature Layer from CDN -->
<script src="http://cdn-geoweb.s3.amazonaws.com/esri-leaflet-clustered-feature-layer/1.0.0-rc.1/esri-leaflet-clustered-feature-layer.js"></script>
<div id="map"></div>
<script>
var map = L.map('map').setView([45.526, -122.667], 15);
L.esri.basemapLayer('Streets').addTo(map);
L.esri.clusteredFeatureLayer('http://services.arcgis.com/rOo16HdIMeOBI4Mb/arcgis/rest/services/Trimet_Transit_Stops/FeatureServer/0').addTo(map);
</script>
</body>
</html>
Esri Leaflet is a project from the Esri PDX R&D Center and the Esri Community