You searched for: Subject Environment Remove constraint Subject: Environment Subject Ecological regions Remove constraint Subject: Ecological regions Place New Jersey Remove constraint Place: New Jersey Place United States Remove constraint Place: United States Place Colorado Remove constraint Place: Colorado Place Alabama Remove constraint Place: Alabama
2004. United States. Forest Service. This polygon shapefile is commonly called Bailey's ecoregions and shows ecosystems of regional extent in the United States, Puerto Rico, and the U.... National Atlas of the United States.
2003. United States. Environmental Protection Agency. This polygon shapefile shows Omernik's Level III ecoregions, derived from a 1:7,500,000 map created by J.M. Omernik in 1987 and from refinements of... National Atlas of the United States.