public static function get_filename($lat, $lon) { $ll = srtm::get_lat_long_adjustments($lat, $lon); //print_R($ll); //always return filename with positive numbers (eg S-33 -> S33) return $ll['lat_dir'] . sprintf("%02.0f", abs((int) ($lat + $ll['lat_adj']))) . $ll['lon_dir'] . sprintf("%03.0f", abs((int) ($lon + $ll['lon_adj']))) . '.hgt'; }
public static function get_filename($lat, $lon) { $ll = srtm::get_lat_long_adjustments($lat, $lon); //print_R($ll); $n_lat = $lat + $ll['lat_adj']; $n_lon = $lon + $ll['lon_adj']; return $ll['lat_dir'] . sprintf("%02.0f", abs((int) ($lat + $ll['lat_adj']))) . $ll['lon_dir'] . sprintf("%03.0f", abs((int) ($lon + $ll['lon_adj']))) . '.hgt'; }