function getMapType( &$pGmaptypeId ) {
		global $gBitSystem;
		$ret = NULL;
		if ( $pGmaptypeId && is_numeric( $pGmaptypeId )) {
 
			$bindVars = array( (int)$pGmaptypeId );
 
			$query = "SELECT bmt.*
          			FROM `".BIT_DB_PREFIX."gmaps_maptypes` bmt
          			WHERE bmt.`maptype_id` = ?";
 
			$result = $this->mDb->query( $query, $bindVars );
 
			if( $result && $result->numRows() ) {
				$ret = $result->fields;
			}
		}
		return $ret;
	}
 
 
 
	//get all maptypes for a given gmap_id
	function getMapTypes( &$pGmapId = NULL ) {
		global $gBitSystem;
		$ret = NULL;
 
		$bindVars = array(); $selectSql = ''; $joinSql = ''; $whereSql = '';
 
		if( @$this->verifyId( $pGmapId ) ) {
			$selectSql .= ", ( SELECT GROUP_CONCAT( gtk.`tilelayer_id` ORDER BY gtk.".$this->mDb->convertSortmode( array( 'pos_asc' ) )." )
					  FROM `".BIT_DB_PREFIX."gmaps_tilelayers_keychain` gtk
					  INNER JOIN `".BIT_DB_PREFIX."gmaps_tilelayers` gtl ON (gtl.`tilelayer_id` = gtk.`tilelayer_id` )
					  WHERE gtk.`maptype_id` = gsk.`set_id` )
					  `tilelayer_ids`";
			$joinSql .= " INNER JOIN `".BIT_DB_PREFIX."gmaps_sets_keychain` gsk ON (gmt.`maptype_id` = gsk.`set_id`) ";
			$whereSql .= " WHERE gsk.`gmap_id` = ? AND gsk.`set_type` = 'maptypes' ";
			array_push( $bindVars, (int)$pGmapId );
		}

	function getMapTypes( &$pGmapId = NULL ) {