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Die Google Maps JavaScript API aktivieren

Zum Einstieg führen wir Sie durch die Google Developers Console, wo Sie vorab Folgendes tun müssen:

  1. Ein Projekt erstellen oder auswählen
  2. Die Google Maps JavaScript API und zugehörige Dienste aktivieren
  3. Zugehörige Schlüssel erstellen
Weiter

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 or view this example full screen.

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

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

function displayLocationElevation(location, elevator, infowindow) {
  // Initiate the location request
  elevator.getElevationForLocations({
    'locations': [location]
  }, function(results, status) {
    infowindow.setPosition(location);
    if (status === 'OK') {
      // 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);
    }
  });
}
<div id="map"></div>
/* 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;
}
 <!-- Replace the value of the key parameter with your own API key. -->
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap">
</script>


Probieren Sie es selbst aus

Bewegen Sie die Maus oben rechts über den Codeblock, um den Code zu kopieren, oder öffnen Sie ihn in JSFiddle.

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Elevation service</title>
    <style>
      /* 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>
  </head>
  <body>
    <div id="map"></div>
    <script>
      function initMap() {
        var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 8,
          center: {lat: 63.333, lng: -150.5},  // Denali.
          mapTypeId: 'terrain'
        });
        var elevator = new google.maps.ElevationService;
        var infowindow = new google.maps.InfoWindow({map: map});

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

      function displayLocationElevation(location, elevator, infowindow) {
        // Initiate the location request
        elevator.getElevationForLocations({
          'locations': [location]
        }, function(results, status) {
          infowindow.setPosition(location);
          if (status === 'OK') {
            // 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>
    <script async defer
    src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
    </script>
  </body>
</html>

Feedback geben zu...

Google Maps JavaScript API
Google Maps JavaScript API