Upper Freeport 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 Upper Freeport coal bed resource areas and attributed with original resources (millions of...本数据集为限定于上弗里波特煤层（Upper Freeport coal bed）资源分布范围的县域多边形覆盖数据集，其属性包含原始资源储量（单位：百万……