public static function PolygonToGeoJson($poly)
{
$str = '[';
$extRing = $poly->GetExteriorRing();
if ($extRing != null) {
$coords = $extRing->GetCoordinates();
$str .= MgGeoJsonWriter::CoordsToGeoJson($coords);
}
$count = $poly->GetInteriorRingCount();
if ($count > 0) {
if ($extRing != null) {
$str .= ",";
}
for ($i = 0; $i < $count; $i++) {
$ring = $poly->GetInteriorRing($i);
$coords = $ring->GetCoordinates();
$str .= MgGeoJsonWriter::CoordsToGeoJson($coords);
if ($i < $count - 1) {
$str .= ",";
}
}
}
$str .= "]";
return $str;
}
