Getting the location of a user from an iPhone using Google Maps API v3 - is it possible?

Is there a way to display Google Maps on the iPhone that automatically shows the user's location upon opening the site?

I've been looking through the Google Maps v3 API but can't seem to find a method for this specific feature. Could it be possible that the iPhone itself has a function for accomplishing this?

Answer №1

Consider utilizing the W3C Geolocation API, which is supported by Safari on the iPhone.

To display a point on Google Maps using data from the Geolocation API, the code will resemble this:

if (navigator.geolocation) { 
  navigator.geolocation.getCurrentPosition(function(position) {  

    var point = new google.maps.LatLng(position.coords.latitude, 
                                       position.coords.longitude);

    // Set up Google Maps API v3
    var map = new google.maps.Map(document.getElementById('map'), {
      zoom: 15,
      center: point,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    });

    // Add a marker
    new google.maps.Marker({
      position: point,
      map: map
    });
  }); 
} 
else {
  alert('W3C Geolocation API is not available');
} 

Ensure that Google Maps API v3 is included in your webpage:

<script src="http://maps.google.com/maps/api/js?sensor=true" 
        type="text/javascript"></script>

... and have a placeholder for the map area:

<div id="map" style="width: 500px; height: 400px;"></div>

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