Third set of 4 sets of map pictographs for U.S. national park maps. PD US Government - National Park Service, U.S. Dept. of the Interior rest of sets: http://openclipart.org/media/files/johnny_automatic/6741 http://openclipart.org/media/files/johnny_automatic/6754 http://openclipart.org/media/files/johnny_automatic/6765 公园 地图 象形文字 NPS 地图象形文字第 3 部分