Esri Leaflet

Querying features

Configuring a query to filter features on a L.esri.FeatureLayer. More information about Feature Layers can be found in the L.esri.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="https://unpkg.com/leaflet@1.2.0/dist/leaflet.css"
    integrity="sha512-M2wvCLH6DSRazYeZRIm1JnYyh22purTM+FDB5CsyxtQJYeKq83arPe5wgbNmcFXGqiSH2XR8dT/fJISVA1r/zQ=="
    crossorigin=""/>
    <script src="https://unpkg.com/leaflet@1.2.0/dist/leaflet.js"
    integrity="sha512-lInM/apFSqyy1o6s89K4iQUKg6ppXEgsVxT35HbzUupEVRh2Eu9Wdl4tHj7dZO0s1uvplcYGmt3498TtHq+log=="
    crossorigin=""></script>


    <!-- Load Esri Leaflet from CDN -->
    <script src="https://unpkg.com/esri-leaflet@2.1.1/dist/esri-leaflet.js"
    integrity="sha512-ECQqaYZke9cSdqlFG08zSkudgrdF6I1d8ViSa7I3VIszJyVqw4ng1G8sehEXlumdMnFYfzY0tMgdQa4WCs9IUw=="
    crossorigin=""></script>


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

<style>
  #query {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 1000;
    background: white;
    padding: 1em;
  }

  #query select {
    font-size: 16px;
  }
</style>

<div id="map"></div>
<div id="query" class="leaflet-bar">
<label>
  Bus Direction
  <select id="direction">
    <!-- make sure to encase string values in single quotes for valid sql -->
    <option value='1=1'>Any</option>
    <option value="direction='North'">North</option>
    <option value="direction='South'">South</option>
    <option value="direction='East'">East</option>
    <option value="direction='West'">West</option>
  </select>
</label>
</div>

<script>
  var map = L.map('map').setView([45.526, -122.667], 15);

  var icons = {
    north: L.icon({
      iconUrl: '//esri.github.io/esri-leaflet/img/bus-stop-north.png',
      iconRetinaUrl: '//esri.github.io/esri-leaflet/img/bus-stop-north@2x.png',
      iconSize: [27, 31],
      iconAnchor: [13.5, 17.5],
      popupAnchor: [0, -11]
    }),
    south: L.icon({
      iconUrl: '//esri.github.io/esri-leaflet/img/bus-stop-south.png',
      iconRetinaUrl: '//esri.github.io/esri-leaflet/img/bus-stop-south@2x.png',
      iconSize: [27, 31],
      iconAnchor: [13.5, 13.5],
      popupAnchor: [0, -11]
    }),
    east: L.icon({
      iconUrl: '//esri.github.io/esri-leaflet/img/bus-stop-east.png',
      iconRetinaUrl: '//esri.github.io/esri-leaflet/img/bus-stop-east@2x.png',
      iconSize: [31, 27],
      iconAnchor: [13.5, 17.5],
      popupAnchor: [0, -11]
    }),
    west: L.icon({
      iconUrl: '//esri.github.io/esri-leaflet/img/bus-stop-west.png',
      iconRetinaUrl: '//esri.github.io/esri-leaflet/img/bus-stop-west@2x.png',
      iconSize: [31, 27],
      iconAnchor: [17.5, 13.5],
      popupAnchor: [0, -11]
    })
  };

  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.marker(latlng, {
        icon: icons[geojson.properties.direction.toLowerCase()]
      });
    }
  }).addTo(map);

  var direction = document.getElementById('direction');

  direction.addEventListener('change', function(){
    stops.setWhere(direction.value);
  });
</script>

</body>
</html>