How get accurate Longitude and Latitude

[asrasrasr]

Hello friends,

I am trying following function to get Longitude and Latitude.

<?php 
function getLatLong($code){
 $mapsApiKey = 'ABQIAAAA7wBDi6CpypoVz_BrL4M4ORTNjq-eX0lgecZr0EpBIKf0u-oJURQ5hwTKIS8zcZIf6aRMVFJX25FigA';
 $query = "http://maps.google.co.uk/maps/geo?q=".urlencode($code)."&output=json&key=".$mapsApiKey;
 $data = file_get_contents($query);
 //$data=var_dump($data);
 // if data returned
 if($data){
  // convert into readable format
 
  $data = json_decode($data);
  $long = $data->Placemark[0]->Point->coordinates[0];
  $lat = $data->Placemark[0]->Point->coordinates[1];
  return array('Latitude'=>$lat,'Longitude'=>$long);
 }else{
  return false;
 }
}
$attays =getLatLong('KT2 5EE'); ?>

This return me
Longitude = -0.3019994
Latitude = 51.422696

Where right value of Longitude and Latitude
Latitude: 51.414205
Longitude: -0.300479

how i get accurate Latitude and Longitude?

[Salathe]

The data returned is only as good as a) the input sent and b) the data store. If the data store (in this case Google's Maps API) doesn't have the exact data that you want, then you just won't get it. For things like post codes, they span an area; in this case at least the provided coordinates appear to fall within the boundary of that post code even if they're not precisely what you're looking for.