Search Constraints
You searched for:
Author
United States. Environmental Protection Agency
Remove constraint Author: United States. Environmental Protection Agency
Institution
Stanford
Remove constraint Institution: Stanford
Place
Alabama
Remove constraint Place: Alabama
Data type
Polygon
Remove constraint Data type: Polygon
Year
2003
Remove constraint Year: 2003
1 entry found
Search Results
1. Omernik's Level III Ecoregions of the Continental United States, 2003
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.