Danforth Hills coal resources calculation area, Northwest Colorado (dan*bndg)

These are shapefiles and ARC/INFO coverages that outline the
areas within which coal resources are calculated and
reported for the A/B through G coal zones, Danforth Hills
coal field. The shapefile DANABBNDG is the defining resource
polygon for the A and B coal zones; DANCbndg is the defining
resource polygon for the C coal zone, and so on.

本数据集包含形状文件（Shapefile）与ARC/INFO 覆盖数据集（ARC/INFO coverage），用于划定丹福斯山煤田（Danforth Hills coal field）A/B至G煤组的煤炭资源核算与报告范围。其中，形状文件DANABBNDG为A、B煤组的资源边界多边形；DANCbndg为C煤组的资源边界多边形，其余以此类推。