Perform a spatial query

You can perform detailed spatial queries on feature layer attributes.

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<html>
  <head>
    <meta charset="utf-8" />
    <title>Perform a spatial query</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>
      <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>
      <style>
        #panel {
          position: absolute;
          top: 10px;
          right: 10px;
          z-index: 1000;
          background: white;
          padding: 10px;
        }
      </style>

    <div id="map"></div>
    <div id="panel" class="leaflet-bar">
      Neighborhoods
      <select name="relation" id="relationSelect">
        <option value="within">Within<options>
        <option value="contains">Contains<options>
        <option value="intersects">Intersects<options>
        <option value="overlaps">Overlaps<options>
      </select>
      <select name="geometry" id="geometrySelect">
        <option value="bounds">Bounds<options>
        <option value="point">Point<options>
        <option value="line">Line<options>
        <option value="polygon">Polygon<options>
      </select>
      <button id="executeQuery">Run Query</button>
    </div>
    <script>
      const apiKey = "YOUR_API_KEY";

      const map = L.map('map').setView([45.525, -122.628], 11);

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

      const neighborhoods = L.esri.featureLayer({
        url: 'https://www.portlandmaps.com/arcgis/rest/services/Public/Zoning/MapServer/32',
        style: {
          color: '#000',
          weight: 1,
          opacity: 0.4
        }
      }).addTo(map);

      const marker = L.marker([45.571034, -122.686386]).addTo(map); // Create a marker object to query against

      const bounds = L.latLngBounds([ // Create a bounds object to query against
        [45.494556, -122.691536],
        [45.538100, -122.608452]
      ]);

      L.rectangle(bounds, { // Create a rectangle to visualize the bounds
        color: 'blue',
        weight: 2
      }).addTo(map);

      const line = L.polyline([ // Create a line to query against
        [45.559256, -122.611885],
        [45.502256, -122.562790],
        [45.483244, -122.620468]
      ], {
        color: 'blue',
        weight: 2
      }).addTo(map);

      const polygon = L.polygon([ // Create a polygon to query against
        [45.484894, -122.493696],
        [45.512025, -122.492199],
        [45.517669, -122.561457],
        [45.487343, -122.558573]
      ], {
        color: 'blue',
        weight: 2
      }).addTo(map);

      const geometries = {
        bounds: bounds,
        line: line,
        polygon: polygon,
        point: marker
      };

      const relationship = document.getElementById('relationSelect');
      const geometry = document.getElementById('geometrySelect');
      const runQueryButton = document.getElementById('executeQuery');
      let previousIds = [];

      function reset () {  // Reset all features back to their regularly defined styles
        for (let i = previousIds.length - 1; i >= 0; i--) {
          neighborhoods.resetStyle(previousIds[i]);
        }
    }

      function query () {
        reset();
        const inputGeometry = geometries[geometry.value];
        neighborhoods.query()[relationship.value](inputGeometry).ids(function (error, ids) {
          if (error) {
            console.log('Error with query: ' + error);
          } else if (ids) {
            previousIds = ids;
            for (let i = ids.length - 1; i >= 0; i--) {
              neighborhoods.setFeatureStyle(ids[i], { color: 'red', weight: 2 });
            }
          }
        });
      }

      runQueryButton.addEventListener('click', query);

      neighborhoods.once('load', function () {
        query();
      });
    </script>
  </body>
</html>

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