Unioned layer of coal resource calculation in the Danforth Hills coal field, Colorado (dan*fing)
Final unioned polygon coverages and shapefiles used to
calculate coal resources of the A through G coal zones,
Danforth Hills coal field, northwestern Colorado. Danafing
was used for the A coal zone; Danbfing was used for the B
coal zone; etc. Polygons that make up the final unioned
polygons include counties, 7.5' …