Cluster points

Replace overlapping points with a single point to represent a cluster using the L.markercluster plugin. To learn more, visit L.esri.Cluster.FeatureLayer in the API reference.

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<html>
  <head>
    <meta charset="utf-8" />
    <title>Cluster points</title>
    <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no" />
    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.8.0/dist/leaflet.css" crossorigin="" />
    <script src="https://unpkg.com/leaflet@1.8.0/dist/leaflet.js" crossorigin=""></script>
    <!-- Load Esri Leaflet from CDN -->
    <script src="https://unpkg.com/esri-leaflet@^3.0.8/dist/esri-leaflet.js"></script>
    <!-- Load Esri Leaflet Vector from CDN -->
    <script src="https://unpkg.com/esri-leaflet-vector@4.0.0/dist/esri-leaflet-vector.js" crossorigin=""></script>
  <!-- Load Leaflet MarkerCluster and Esri Leaflet Cluster from CDN -->
    <link rel="stylesheet" type="text/css"
      href="https://unpkg.com/leaflet.markercluster@1.5.0/dist/MarkerCluster.Default.css"
      integrity="sha512-6ZCLMiYwTeli2rVh3XAPxy3YoR5fVxGdH/pz+KMCzRY2M65Emgkw00Yqmhh8qLGeYQ3LbVZGdmOX9KUjSKr0TA=="
      crossorigin="">
    <link rel="stylesheet" type="text/css" href="https://unpkg.com/leaflet.markercluster@1.5.0/dist/MarkerCluster.css"
      integrity="sha512-mQ77VzAakzdpWdgfL/lM1ksNy89uFgibRQANsNneSTMD/bj0Y/8+94XMwYhnbzx8eki2hrbPpDm0vD0CiT2lcg=="
      crossorigin="">
    <script src="https://unpkg.com/leaflet.markercluster@1.5.0/dist/leaflet.markercluster.js"
      integrity="sha512-pWPELjRaw2ZdoT0PDi7iRpRlk1XX3rtnfejJ/HwskyojpHei+9hKpwdphC4yssNt4FM0TjMQOmMrk6ZYSn274w=="
      crossorigin=""></script>
    <script src="https://unpkg.com/esri-leaflet-cluster@2.1.0/dist/esri-leaflet-cluster.js"
      integrity="sha512-fEdNFHisleVtEYdLhW4Z2RsR7TN6hLutE/+O4D+skfTNY2rlHm8HOZARPWkdrFFy/+i2KjFxcZAKTUWaVfbV0g=="
      crossorigin=""></script>
    <style>
      html,
      body,
      #map {
        padding: 0;
        margin: 0;
        height: 100%;
        width: 100%;
        font-family: Arial, Helvetica, sans-serif;
        font-size: 14px;
        color: #323232;
      }
    </style>
  </head>
  <body>
    <div id="map"></div>
    <script>
      const apiKey = "YOUR_API_KEY";

      const map = L.map("map", {
        maxZoom: 18 //The clustering plugin needs to understand the map's maxZoom
      }).setView([0, 0], 2);

      L.esri.Vector.vectorBasemapLayer("ArcGIS:Community", {
        apikey: apiKey
      }).addTo(map);

      //  (new constructor syntax at 2.0.0)
      L.esri.Cluster.featureLayer({
        url: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Earthquakes_Since1970/MapServer/0"
      }).addTo(map);
    </script>
  </body>
</html>

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