HTML5 Geolocation / PDF

Sample of the pdf document :

Locate the User's Position

The HTML5 Geolocation API is used to get the geographical position of a user.

Since this can compromise user privacy, the position is not available unless the user approves it.

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Browser Support

Internet Explorer 9, Firefox, Chrome, Safari and Opera support Geolocation.

Note: Geolocation is much more accurate for devices with GPS, like iPhone.

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HTML5 - Using Geolocation

Use the getCurrentPosition() method to get the user's position.

The example below is a simple Geolocation example returning the latitude and longitude of the user's position:

Example

<script>
var x=document.getElementById("demo");
function getLocation()
  {
  if (navigator.geolocation)
    {
    navigator.geolocation.getCurrentPosition(showPosition);
    }
  else{x.innerHTML="Geolocation is not supported by this browser.";}
  }
function showPosition(position)
  {
  x.innerHTML="Latitude: " + position.coords.latitude + 
  "<br>Longitude: " + position.coords.longitude; 
  }
</script>

Example explained:

•     Check if Geolocation is supported
•     If supported, run the getCurrentPosition() method. If not, display a message to the user
•     If the getCurrentPosition() method is successful, it returns a coordinates object to the function specified in the parameter ( showPosition )
•     The showPosition() function gets the displays the Latitude and Longitude

The example above is a very basic Geolocation script, with no error handling......

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