Pittsburgh Coal Bed Original Resources by County 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 original resource values (millions...本数据集为限定于匹兹堡煤层（Pittsburgh coal bed）资源区域范围的县级多边形覆盖数据集，并附带原始资源价值（单位：百万……）属性。