public static function convertUtmToLL($e, $n, $z, $d)
{
$retArr = array();
if ($e && $n && $z) {
$gPoint = new GPoint($d);
$gPoint->setUTM($e, $n, $z);
$gPoint->convertTMtoLL();
$lat = $gPoint->Lat();
$lng = $gPoint->Long();
if ($lat && $lng) {
$retArr['lat'] = round($lat, 6);
$retArr['lng'] = round($lng, 6);
}
}
return $retArr;
}