Summary and code samples for GPS calls and detection :HTML5

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.

Use the watchPosition () 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:

if (navigator.geolocation) {

    navigator.geolocation.watchPosition(function (pos) {

     

       var lat = pos.coords.latitude;

        var lng = pos.coords.longitude; 

        if (lat != 0) {

            $("#lat").val(lat);// Assign hidden input field

            $("#lng").val(lng); // Assign hidden input field

        }

    });

}

else {

   

    alert( "Geolocation is not supported by this browser.");

   

}

Note : Add this code inside  <script> .....</script>  tag in your page

Example explained:

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

Handling Errors and Rejections:

For Handling Error We can use below code.

navigator.geolocation.getCurrentPosition(success, error, options);

var options = {

    enableHighAccuracy: true,

    timeout: 50000,

    maximumAge: 0

};

function success(pos) {

    var crd = pos.coords;

};

function error(err) {

    alert('ERROR(' + err.code + '): ' + err.message);

};