Esri Leaflet

Querying features

Performing advanced queries on a Feature Layer. Click on the map to query all features within 500 meters. More information about Feature Layers can be found in the L.esri.Layers.FeatureLayer documentation.

<html>
<head>
  <meta charset=utf-8 />
  <title>Querying features</title>
  <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />

  <!-- Load Leaflet from CDN-->
  <link rel="stylesheet" href="//cdn.jsdelivr.net/leaflet/0.7.3/leaflet.css" />
  <script src="//cdn.jsdelivr.net/leaflet/0.7.3/leaflet.js"></script>

  <!-- Load Esri Leaflet from CDN -->
  <script src="//cdn.jsdelivr.net/leaflet.esri/1.0.3/esri-leaflet.js"></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([45.526, -122.667], 15);

  L.esri.basemapLayer('Streets').addTo(map);
  var stops = L.esri.featureLayer({
    url: 'https://services.arcgis.com/rOo16HdIMeOBI4Mb/arcgis/rest/services/Trimet_Transit_Stops/FeatureServer/0',
    pointToLayer: function (geojson, latlng) {
      return L.circleMarker(latlng, {
        color: '#5B7CBA',
        weight: 2,
        opacity: 0.85,
        fillOpacity: 0.5
      });
    }
  }).addTo(map);

  var previousIds = [];

  map.on('click', function(e){
    stops.query().nearby(e.latlng, 500).ids(function(error, ids){
      for (var j = 0; j < previousIds.length; j++) {
        stops.resetStyle(previousIds[j]);
      }

      previousIds = ids;

      for (var i = 0; i < ids.length; i++) {
        stops.setFeatureStyle(ids[i], {
          color: '#BA454E',
          weight: 2,
          opacity: 0.85,
          fillOpacity: 0.5
        });
      }
    });
  });
</script>

</body>
</html>

Edit this sample on GitHub

Esri Leaflet is a project from the Esri PDX R&D Center and the Esri Community