CARTO for deck.gl

CARTO for deck.gl

Heatmap Layer

This example shows how to use the HeatmapLayer to visualize the spatial distribution of data.

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<html>
  <head>
    <script src="https://unpkg.com/deck.gl@^8.6.0/dist.min.js"></script>
    <script src="https://unpkg.com/@deck.gl/carto@^8.6.0/dist.min.js"></script>
    
    <script src="https://libs.cartocdn.com/mapbox-gl/v1.13.0/mapbox-gl.js"></script>
    <link href="https://libs.cartocdn.com/mapbox-gl/v1.13.0/mapbox-gl.css" rel="stylesheet" />
  </head>

  <body style="margin: 0; padding: 0">
    <div id="map" style="width: 100vw; height: 100vh"></div>
  </body>

  <script type="text/javascript">
    async function initialize() {
      deck.carto.setDefaultCredentials({
        apiBaseUrl: 'https://gcp-us-east1.api.carto.com',
        apiVersion: deck.carto.API_VERSIONS.V3,
        accessToken: 'eyJhbGciOiJIUzI1NiJ9.eyJhIjoiYWNfbHFlM3p3Z3UiLCJqdGkiOiI1YjI0OWE2ZCJ9.Y7zB30NJFzq5fPv8W5nkoH5lPXFWQP0uywDtqUg8y8c'
      });

      // Fetch Data from CARTO
      const geojsonData =  await deck.carto.getData({
        type: deck.carto.MAP_TYPES.QUERY,
        source: `SELECT geom, weight FROM cartobq.public_account.uber_pickup_locations`,
        connection: 'bqconn',
        format: deck.carto.FORMATS.GEOJSON
      });

      // Create deck.gl map
      const deckgl = new deck.DeckGL({
        container: 'map',
        mapStyle: deck.carto.BASEMAP.DARK_MATTER,
        initialViewState: {
          longitude: -73.95,
          latitude: 40.73,
          zoom: 10.5,
          maxZoom: 16
        },
        controller: true,
        layers: [
          new deck.HeatmapLayer({
            id: 'heatmap-layer',
            data: geojsonData.features,
            pickable: false,
            opacity: 0.8,
            getPosition: d => d.geometry.coordinates,
            getWeight: d => d.properties.weight,
            radiusPixels: 35,
            intensity: 1,
            threshold: 0.3
          })
        ]
      });
    }

    initialize();    
  </script>
</html>