# Trips Layer

This example shows how to use the [TripsLayer](https://deck.gl/docs/api-reference/geo-layers/trips-layer) to **render animated paths** that represent vehicle trips.

{% tabs %}
{% tab title="CARTO 3" %}
{% embed url="<https://codesandbox.io/embed/carto-google-maps-examples-w2puou?fontsize=14&hidenavigation=1&initialpath=%2Fadvanced-examples%2Ftrips-layer.html&module=%2Fadvanced-examples%2Ftrips-layer.html>" %}

```html
<!DOCTYPE html>
<html>

<head>
  <title>Extrusion</title>
  <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
  <script src="https://unpkg.com/deck.gl@^8.8.0/dist.min.js"></script>
  <script src="https://unpkg.com/@deck.gl/carto@^8.8.0/dist.min.js"></script>
  <style>
    #map {
      height: 100%;
    }

    html,
    body {
      height: 100%;
      margin: 0;
      padding: 0;
    }
  </style>
</head>

<body>

  <div id="map"></div>

  <script
    src="https://maps.googleapis.com/maps/api/js?key=AIzaSyDvHtBZM79O5uGTBT1ZOWOKW2_FVMstHNs&callback=initMap&libraries=&v=beta"
    async></script>

</body>

<script type="text/javascript">
  let map;
  const LOOP_LENGTH = 1800;
  const ANIMATION_SPEED = 0.4;
  let time = 0;
  let layerData = [];
  let deckOverlay;

  function initMap() {
    map = new google.maps.Map(document.getElementById("map"), {
      center: { lat: 40.73, lng: -74 },
      zoom: 13,
      tilt: 45,
      mapId: '2a9fc80dfecb64f8',
      fullscreenControl: false,
      streetViewControl: false,
      zoomControlOptions: {
        position: google.maps.ControlPosition.LEFT_BOTTOM,
      },
    });

    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
    deck.carto.fetchLayerData({
      type: deck.carto.MAP_TYPES.QUERY,
      source: `SELECT geom, vendor, 
                        TO_JSON_STRING(timestamps) AS timestamps 
                   FROM cartobq.public_account.new_york_trips`,
      connection: 'bqconn',
      format: deck.carto.FORMATS.GEOJSON
    }).then(({ data: geojsonData }) => {
      // TripsLayer needs data in the following format
      layerData = geojsonData.features.map(f => ({
        vendor: f.properties.vendor,
        timestamps: JSON.parse(f.properties.timestamps),
        path: f.geometry.coordinates
      }));
    });

    deckOverlay = new deck.GoogleMapsOverlay({});

    deckOverlay.setMap(map);

    initAnimation();
  }

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

  function initAnimation() {

    setInterval(() => {
      deckOverlay.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);
  }

</script>

</html>
```

{% endtab %}

{% tab title="CARTO 2" %}
{% embed url="<https://codesandbox.io/embed/carto-google-maps-examples-w2puou?fontsize=14&hidenavigation=1&initialpath=%2Fadvanced-examples%2ftrips-layer-carto2.html&module=%2Fadvanced-examples%2ftrips-layer-carto2.html>" %}

```html
<!DOCTYPE html>
<html>

<head>
  <title>Extrusion</title>
  <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
  <script src="https://unpkg.com/deck.gl@^8.8.0/dist.min.js"></script>
  <script src="https://unpkg.com/@deck.gl/carto@^8.8.0/dist.min.js"></script>
  <style>
    #map {
      height: 100%;
    }

    html,
    body {
      height: 100%;
      margin: 0;
      padding: 0;
    }
  </style>
</head>

<body>

  <div id="map"></div>

  <script
    src="https://maps.googleapis.com/maps/api/js?key=AIzaSyDvHtBZM79O5uGTBT1ZOWOKW2_FVMstHNs&callback=initMap&libraries=&v=beta"
    async></script>

</body>

<script type="text/javascript">
  let map;
  const LOOP_LENGTH = 1800;
  const ANIMATION_SPEED = 0.4;
  let time = 0;
  let layerData = [];
  let deckOverlay;

  function initMap() {
    map = new google.maps.Map(document.getElementById("map"), {
      center: { lat: 40.73, lng: -74 },
      zoom: 13,
      tilt: 45,
      mapId: '2a9fc80dfecb64f8',
      fullscreenControl: false,
      streetViewControl: false,
      zoomControlOptions: {
        position: google.maps.ControlPosition.LEFT_BOTTOM,
      },
    });

    deck.carto.setDefaultCredentials({
      username: 'public',
      apiKey: 'default_public',
      apiVersion: deck.carto.API_VERSIONS.V2,
    });

    // 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`;
    fetch(url)
      .then(response => response.json())
      .then((geojsonData) => {
        // TripsLayer needs data in the following format
        layerData = geojsonData.features.map(f => ({
          vendor: f.properties.vendor,
          timestamps: f.properties.timestamps,
          path: f.geometry.coordinates[0]
        }));
      });

    deckOverlay = new deck.GoogleMapsOverlay({});

    deckOverlay.setMap(map);

    initAnimation();
  }

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

  function initAnimation() {

    setInterval(() => {
      deckOverlay.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);
  }

</script>

</html>
```

{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.carto.com/carto-for-developers/key-concepts/carto-for-deck.gl/basemaps/carto-google-maps/readme-1/advanced-examples/trips-layer.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
