from http://www.phpclasses.org/package/7147-PHP-Perform-calculations-with-geographic-coordinates.html... DED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUD... VISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
class GeoTools {
const EARTH_RADIUS = 6378100;// r... sin($psi) / sin($phi);
$longA = ($long - asin($arcsin)) * $radian;
return array('lon'
