Проверьте ниже код, я надеюсь, что это помогает ..
<input type="button" onclick="GetLocation()" value="Get Location" />
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
<!--
function GetLocation() {
var geocoder = new google.maps.Geocoder();
var address = document.getElementById("txtAddress").value;
geocoder.geocode({ 'address': address }, function (results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var latitude = results[0].geometry.location.lat();
var longitude = results[0].geometry.location.lng();
alert("Latitude: " + latitude + "\nLongitude: " + longitude);
} else {
alert("Request failed.")
}
});
};
</script>