Elevation Service

This example demonstrates the use of the ElevationService object. Click on the map to display the elevation at the clicked point. Read the documentation.

TypeScript

function initMap(): void {
  const map = new google.maps.Map(
    document.getElementById("map") as HTMLElement,
    {
      zoom: 8,
      center: { lat: 63.333, lng: -150.5 }, // Denali.
      mapTypeId: "terrain",
    }
  );
  const elevator = new google.maps.ElevationService();
  const infowindow = new google.maps.InfoWindow({});
  infowindow.open(map);

  // Add a listener for the click event. Display the elevation for the LatLng of
  // the click inside the infowindow.
  map.addListener("click", (event) => {
    displayLocationElevation(event.latLng, elevator, infowindow);
  });
}

function displayLocationElevation(
  location: google.maps.LatLng,
  elevator: google.maps.ElevationService,
  infowindow: google.maps.InfoWindow
) {
  // Initiate the location request
  elevator.getElevationForLocations(
    {
      locations: [location],
    },
    (results, status) => {
      infowindow.setPosition(location);

      if (status === "OK" && results) {
        // Retrieve the first result
        if (results[0]) {
          // Open the infowindow indicating the elevation at the clicked position.
          infowindow.setContent(
            "The elevation at this point <br>is " +
              results[0].elevation +
              " meters."
          );
        } else {
          infowindow.setContent("No results found");
        }
      } else {
        infowindow.setContent("Elevation service failed due to: " + status);
      }
    }
  );
}index.ts

JavaScript

function initMap() {
  const map = new google.maps.Map(document.getElementById("map"), {
    zoom: 8,
    center: { lat: 63.333, lng: -150.5 },
    mapTypeId: "terrain",
  });
  const elevator = new google.maps.ElevationService();
  const infowindow = new google.maps.InfoWindow({});
  infowindow.open(map);
  // Add a listener for the click event. Display the elevation for the LatLng of
  // the click inside the infowindow.
  map.addListener("click", (event) => {
    displayLocationElevation(event.latLng, elevator, infowindow);
  });
}

function displayLocationElevation(location, elevator, infowindow) {
  // Initiate the location request
  elevator.getElevationForLocations(
    {
      locations: [location],
    },
    (results, status) => {
      infowindow.setPosition(location);

      if (status === "OK" && results) {
        // Retrieve the first result
        if (results[0]) {
          // Open the infowindow indicating the elevation at the clicked position.
          infowindow.setContent(
            "The elevation at this point <br>is " +
              results[0].elevation +
              " meters."
          );
        } else {
          infowindow.setContent("No results found");
        }
      } else {
        infowindow.setContent("Elevation service failed due to: " + status);
      }
    }
  );
}
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

<!DOCTYPE html>
<html>
  <head>
    <title>Elevation Service</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script src="./index.js"></script>
  </head>
  <body>
    <div id="map"></div>

    <!-- Async script executes immediately and must be after any DOM elements used in callback. -->
    <script
      src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
      async
    ></script>
  </body>
</html>sample.html

All

<!DOCTYPE html>
<html>
  <head>
    <title>Elevation Service</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <style type="text/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>
    <script>
      function initMap() {
        const map = new google.maps.Map(document.getElementById("map"), {
          zoom: 8,
          center: { lat: 63.333, lng: -150.5 },
          mapTypeId: "terrain",
        });
        const elevator = new google.maps.ElevationService();
        const infowindow = new google.maps.InfoWindow({});
        infowindow.open(map);
        // Add a listener for the click event. Display the elevation for the LatLng of
        // the click inside the infowindow.
        map.addListener("click", (event) => {
          displayLocationElevation(event.latLng, elevator, infowindow);
        });
      }

      function displayLocationElevation(location, elevator, infowindow) {
        // Initiate the location request
        elevator.getElevationForLocations(
          {
            locations: [location],
          },
          (results, status) => {
            infowindow.setPosition(location);

            if (status === "OK" && results) {
              // Retrieve the first result
              if (results[0]) {
                // Open the infowindow indicating the elevation at the clicked position.
                infowindow.setContent(
                  "The elevation at this point <br>is " +
                    results[0].elevation +
                    " meters."
                );
              } else {
                infowindow.setContent("No results found");
              }
            } else {
              infowindow.setContent(
                "Elevation service failed due to: " + status
              );
            }
          }
        );
      }
    </script>
  </head>
  <body>
    <div id="map"></div>

    <!-- Async script executes immediately and must be after any DOM elements used in callback. -->
    <script
      src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
      async
    ></script>
  </body>
</html>
inline.html

/* 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; }

<!DOCTYPE html> <html> <head> <title>Elevation Service</title> <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>  </head> <body> <div id="map"></div>  <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBIwzALxUPNbatRBj3Xi1Uhp0fFzwWNBkE&callback=initMap&libraries=&v=weekly" async ></script> </body> </html>

Create a starter application from sample

A skeleton starter application using TypeScript, Webpack, and Babel can be generated from this sample using one of the methods below.

Run Locally

Node.js is required to run this sample locally. Follow these instructions to install Node.js and NPM.

npx @googlemaps/js-samples init elevation-simple DESTINATION_FOLDER

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