CARTO for deck.gl

CARTO for deck.gl

Trips Layer

This example shows how to use the TripsLayer to render animated paths that represent vehicle trips.

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<html>
  <head>
    <script src="https://unpkg.com/deck.gl@^8.5.0/dist.min.js"></script>
    <script src="https://unpkg.com/@deck.gl/carto@^8.5.0/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">
    const LOOP_LENGTH = 1800;
    const ANIMATION_SPEED = 0.4;

    async function initialize() {
      deck.carto.setDefaultCredentials({
        username: 'public',
        apiKey: 'default_public',
      });

      // Fetch Data from CARTO
      const query = 'SELECT the_geom, vendor, timestamps FROM new_york_trips';
      const url = `https://public.carto.com/api/v2/sql?q=${query}&format=geojson`;
      const geojsonData = await fetch(url).then(response => response.json());
      // TripsLayer needs data in the following format
      const layerData = geojsonData.features.map(f => ({
        vendor: f.properties.vendor,
        timestamps: f.properties.timestamps,
        path: f.geometry.coordinates[0]
      }));

      const deckgl = new deck.DeckGL({
        container: 'map',
        mapStyle: deck.carto.BASEMAP.DARK_MATTER_NOLABELS,
        initialViewState: {
          longitude: -74,
          latitude: 40.73,
          zoom: 12,
          pitch: 45,
          bearing: 0
        },
        controller: true
      });

      let time = 0;

      function animate() {
        time = (time + ANIMATION_SPEED) % LOOP_LENGTH;
        window.requestAnimationFrame(animate);
      }

      setInterval(() => {
        deckgl.setProps({
          layers: [
            new deck.TripsLayer({
              id: 'trips-layer',
              data: layerData,
              getPath: d => d.path,
              getTimestamps: d => d.timestamps,
              getColor: d => (d.vendor === 0 ? [253, 128, 93] : [23, 184, 190]),
              opacity: 0.3,
              widthMinPixels: 2,
              rounded: true,
              trailLength: 180,
              currentTime: time,
              shadowEnabled: false
            })
          ]
        });
      }, 50);

      window.requestAnimationFrame(animate);
    }

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