Trails

Data was hand drawn on USGS Topographic quads by foresters of the Vermont Department of Forests, Parks, & Recreation using orthophotos, survey data, and personal...本数据集的数据由佛蒙特州森林、公园与娱乐部（Vermont Department of Forests, Parks, & Recreation）的林务员，以美国地质调查局（United States Geological Survey, USGS）地形分幅图为底图，借助正射影像（orthophotos）、测量数据及个人相关资料（原文未完整）手工绘制完成。