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jonkemp on 07/15/10

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Last Edited at 07/15/10 04:30am

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HTML5 Geolocation with Google Maps

/ Published in: JavaScript

HTML5 geolocation using the new HTML5 geolocation API, JavaScript and Google Maps. HTML5 geolocation detection is included. This will work in almost every modern browser except IE, but if your browser does not support it, it will tell you so. It will also provide a message to the user if they decline to share their location with the browser. This example uses jQuery.

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<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>HTML5 Geolocation Demo</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
</head>
 
<body>
 
<div id="doc">
 
	<h1>HTML5 Geolocation Demo</h1>
 
	<div id="geo-wrapper"></div>
	<p id="msg"></p>
	<p id="lat"></p>
	<p id="long"></p>
 
</div>
 
<script type="text/javascript">
function supports_geolocation() {
  return !!navigator.geolocation;
}
 
function get_location() {
  if ( supports_geolocation() ) {
    navigator.geolocation.getCurrentPosition(show_map, handle_error);
  } else {
    // no native support;
	$("#msg").text('Your browser doesn\'t support geolocation!');
  }
}
 
function show_map(position) {
	var latitude = position.coords.latitude;
	var longitude = position.coords.longitude;
	// let's show a map or do something interesting!
 
	$("#geo-wrapper").css({'width':'640px','height':'480px'});
 
	var latlng = new google.maps.LatLng(latitude, longitude);
	var myOptions = {
		zoom: 10,
		center: latlng,
		mapTypeId: google.maps.MapTypeId.ROADMAP
	};
	var map = new google.maps.Map(document.getElementById("geo-wrapper"), myOptions);
 
	var marker = new google.maps.Marker({
		position: latlng,
		title:"You are here (more or less)!"
	});
 
	// To add the marker to the map, call setMap();
	marker.setMap(map);
 
	$("#msg").text('Your browser thinks you are here:');
	$("#lat").text('Latitude: ' + latitude);
	$("#long").text('Longitude: ' + longitude);
}
 
function handle_error(err) {
  if (err.code == 1) {
    // user said no!
	$("#msg").text('You chose not to share your location.');
  }
}
 
get_location();
</script>
 
</body>
</html>