private function _configure()
 {
     TileCache::$daysToRemember = $this->_conf->get('tile_cache_days_of_memory');
     TileCache::$numberOfFilesToDelete = $this->_conf->get('tile_cache_number_of_files_to_delete');
     TilesGetter::$limitOfTiles = $this->_conf->get('max_number_of_tiles_per_map');
     $defaultColor = new Color();
     $defaultColor->setColor($this->_conf->get('default_drawings_color'));
     DrawRequest::$defaultColor = $defaultColor;
     DrawRequest::$defaultThickness = new ParamThickness($this->_conf->get('default_path_thickness'));
     DrawRequest::$defaultTransparency = new ParamTransparency($this->_conf->get('default_drawings_transparency'));
     ParamPatternUrl::$patternMap = $this->_conf->get('pattern_point_image_map');
 }