public function getOutlineMapsList() {
        $res = array();
        $root_path = WT_ROOT.WT_MODULES_DIR.Constants::MODULE_MAJ_GEODISP_NAME.'/maps/';
        if(is_dir($root_path)){
            $dir = opendir($root_path);
            while (($file=readdir($dir))!== false) {
                if (preg_match('/^[a-zA-Z0-9_]+.xml$/', $file)) {
                    $res[base64_encode($file)] = new OutlineMap($file, true);
                }
            }
        }
        return $res;
    }