LECL Lewis and Clark National Historic Trail Congressionally Designated Route

This data set represents the official National Park Service centerline of the route of the Lewis and Clark National Historic Trail designated by Congress (P.L....本数据集收录由国会（P.L.……）指定的刘易斯与克拉克国家历史步道（Lewis and Clark National Historic Trail）的官方美国国家公园管理局（National Park Service）路线中心线数据。