Pittsburgh Coal Bed County Statistics (Geology) in Pennsylvania, Ohio, West Virginia, and Maryland

This dataset is a polygon coverage of counties limited to the extent of the Pittsburgh coal bed resource areas and attributed with statistics on the thickness of the...本数据集为以县级行政区为单元的多边形覆盖数据集，其空间范围限定于匹兹堡煤层资源区，并附带了关于……厚度的统计属性。