2026-05-08T01:31:28Z

Omernik's Level III Ecoregions of the Continental United States, 2003

Gbl Index Year Im:

2003

Dct Creator Sm:

United States. Environmental Protection Agency

Dct Description Sm:

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...

Dct Publisher Sm:

National Atlas of the United States