Unioned layer of Sheridan coalfield, Wyodak-Anderson, Wyoming (shrfing.shp)

This ArcView shapefile contains a polygon representation
of numerous themes associated with the
Wyodak-Anderson coal zone in the Sheridan coalfield.
The purpose of this theme is to allow the user to perform
multiple theme queries. This theme was created specifically
for the National Coal Resource Assessment in the Northern
Rocky Mountains and Great Plains Region.

本ArcView 形状文件（ArcView shapefile）包含谢里登煤田内与怀俄达克-安德森煤系相关的多个专题图层的多边形矢量表示数据。该专题图层的设计目标是支持用户执行多专题查询操作，且专为落基山脉北部与大平原地区的全国煤炭资源评估（National Coal Resource Assessment）工作定制开发。