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Start Over Place Arkansas Year 2003 Bounding Box -40.000931 39.999015 -39.999064 40.000987

1. Color North America Shaded Relief: 1-Kilometer Resolution

Datasets Stanford University Public content
2003. USGS National Center for EROS. The North America Shaded Relief data were derived from the GTOPO30 elevation data. GTOPO30 is a global digital elevation model (DEM) with a horizon... National Atlas of the United States.

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

Datasets Stanford University Public content
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.