Transit Layer

  • This example demonstrates how to display the public transit network of London using the Google Maps JavaScript API.

  • It uses the TransitLayer class to overlay transit data onto a basic map centered on London.

  • The code provides implementations in both TypeScript and JavaScript, with the JavaScript version being compiled from TypeScript.

  • The sample includes HTML, CSS, and JavaScript/TypeScript code to create a fully functional web page displaying the map.

  • Users can interact with the sample via provided links to JSFiddle, Google Cloud Shell, or by cloning and running the code locally.

This example creates a map that displays the public transit network of London, UK.

Read the documentation.

TypeScript

function initMap(): void {
  const map = new google.maps.Map(
    document.getElementById("map") as HTMLElement,
    {
      zoom: 13,
      center: { lat: 51.501904, lng: -0.115871 },
    }
  );

  const transitLayer = new google.maps.TransitLayer();

  transitLayer.setMap(map);
}

declare global {
  interface Window {
    initMap: () => void;
  }
}
window.initMap = initMap;
index.ts

JavaScript

function initMap() {
  const map = new google.maps.Map(document.getElementById("map"), {
    zoom: 13,
    center: { lat: 51.501904, lng: -0.115871 },
  });
  const transitLayer = new google.maps.TransitLayer();

  transitLayer.setMap(map);
}

window.initMap = initMap;
index.js

CSS

/* 
 * Always set the map height explicitly to define the size of the div element
 * that contains the map. 
 */
#map {
  height: 100%;
}

/* 
 * Optional: Makes the sample page fill the window. 
 */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

style.css

HTML

<html>
  <head>
    <title>Transit Layer</title>

    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script type="module" src="./index.js"></script>
  </head>
  <body>
    <div id="map"></div>

    <!-- 
      The `defer` attribute causes the script to execute after the full HTML
      document has been parsed. For non-blocking uses, avoiding race conditions,
      and consistent behavior across browsers, consider loading using Promises. See
      https://developers.google.com/maps/documentation/javascript/load-maps-js-api
      for more information.
      -->
    <script
      src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&v=weekly"
      defer
    ></script>
  </body>
</html>
index.html

Try Sample

Clone Sample

Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application. 

  git clone -b sample-layer-transit https://github.com/googlemaps/js-samples.git
  cd js-samples
  npm i
  npm start

Other samples can be tried by switching to any branch beginning with sample-SAMPLE_NAME. 

  git checkout sample-SAMPLE_NAME
  npm i
  npm start