Pocahontas No. 3 Coal Bed County Statistics (Chemistry) in West Virginia and Virginia

This dataset is a polygon coverage of counties limited to the extent of the Pocahontas No. 3 coal bed resource areas and attributed with statistics on these coal...本数据集为覆盖波卡洪塔斯3号煤层（Pocahontas No. 3 coal bed）资源区域范围内各县的多边形覆盖数据集，并附带有关该类煤炭的相关统计属性……