Вы можете использовать API Карт Google v3, например:
//get the input from user, in a normal looking address string
var add = this.ListingAddress + ', ' + this.ListingCity + ', ' + this.ListingZipCode;
var geocoder = new google.maps.Geocoder();
geocoder.geocode({ 'address': add }, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var LatLong = results[0].geometry.location; //here is the LatLong
} else {
alert("Address not found! Error Code: " + status);
}
});