Esri Leaflet

Load each and every feature initially

Sometimes it is desirable to load a "snapshot" of a Feature Layer instead of loading it progressively as you pan around the map. The approach is useful for smaller services.

<html>
<head>
  <meta charset="utf-8" />
  <title>Load each and every feature initially</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@1.5.1/dist/leaflet.css"
  integrity="sha512-xwE/Az9zrjBIphAcBb3F6JVqxf46+CDLwfLMHloNu6KEQCAWi6HcDUbeOfBIptF7tcCzusKFjFw2yuvEpDL9wQ=="
  crossorigin=""/>
  <script src="https://unpkg.com/leaflet@1.5.1/dist/leaflet.js"
  integrity="sha512-GffPMF3RvMeYyc1LWMHtK8EbPv0iNZ8/oTtHPx9/cc2ILxQ+u905qIwdpULaqDkyBKgOaB57QTMg7ztg8Jm2Og=="
  crossorigin=""></script>


  <!-- Load Esri Leaflet from CDN -->
  <script src="https://unpkg.com/esri-leaflet@2.3.0/dist/esri-leaflet.js"
  integrity="sha512-1tScwpjXwwnm6tTva0l0/ZgM3rYNbdyMj5q6RSQMbNX6EUMhYDE3pMRGZaT41zHEvLoWEK7qFEJmZDOoDMU7/Q=="
  crossorigin=""></script>


  <style>
    body { margin:0; padding:0; }
    #map { position: absolute; top:0; bottom:0; right:0; left:0; }
  </style>
</head>
<body>

<div id="map"></div>

<script>
  var map = L.map('map').setView([41.004, -77.618], 7);

  L.esri.basemapLayer('Topographic').addTo(map);

  var statesUrl = 'https://sampleserver6.arcgisonline.com/arcgis/rest/services/USA/MapServer/2';
  var citiesUrl = 'https://sampleserver6.arcgisonline.com/arcgis/rest/services/USA/MapServer/0';

  // query a feature service for a state
  L.esri.query({
    url: statesUrl
  }).where("state_name='Pennsylvania'").run(function (error, states) {
    if (error) {
      return;
    }

    // draw state on the map
    var pennsylvania = L.geoJSON(states).addTo(map);

    // fit map to boundary
    map.fitBounds(pennsylvania.getBounds());

    // query all cities with a population greater than 30,000 (pop2000 > 30000) inside our boundary
    L.esri.query({
      url: citiesUrl
    }).where('pop2000 > 30000').within(pennsylvania).run(function (error, cities) {
      if (error) {
        return;
      }

      L.geoJSON(cities).addTo(map);
    });
  });
</script>

</body>
</html>