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Find Latitude and Longitude of a Location: Google Map API

July 1, 2009

Recently I handled a project that required map location (Latitude and Longitude) based on radius from a user defined point. The user enter the location (i.e.) Country, State, City with in a certain miles or kilometers (10, 20, 50, 500…. Any) are found from the database.

This solution uses Google map API. Already we have seen some posts regarding Google map API. This is a another example to find the latitude and longitude according to the location.

Example, While registration of a user i’ll store the latitude and longitude of a user. For that,



From the above location we are going to find the latitude and longitude,

function storeMapValue()
   var state = document.getElementById("state").selectedIndex;
   var country = document.getElementById("country").selectedIndex;
   var city = document.getElementById("city").selectedIndex;

   var value = document.getElementById("city").options[city].text+
   alert(value); // Madurai,Tamil Nadu, India
   var add = new showAddress(value); // Sending the location to
   another function
var map = null;
var geocoder = null;

function showAddress(address)
   geocoder = new GClientGeocoder();
       if (!point)
          alert(address + " not found");
          place=point.Placemark[0]; // if you alert place
          get [object] [object]
          point=new GLatLng(place.Point.coordinates[1],
          place.Point.coordinates[0]); //Spliting the latitude and

          document.getElementById("lat").value =
          document.getElementById("lang").value =
          //Storing the latitude and longitude in a textbox may
            be hidden.

By using the sql query in the previous post we can calculate the distance beetween the two locations. This module is mainly used for searching.


From → Google API

One Comment
  1. Nice code

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