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

1993. 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. Grayscale North America Shaded Relief 1-Kilometer Resolution

1993. EROS Data Center. The grayscale North America shaded relief data were derived from the GTOPO30 elevation data. GTOPO30 is a global digital elevation model (DEM) with... National Atlas of the United States.

3. North America: Drainage Directions, 15s resolution, 2009

2009. World Wildlife Fund (WWF). This drainage direction map for North America defines the direction of flow from each cell in the conditioned digital elevation model to its steepe... U.S. Geological Survey.

4. North America: Drainage Directions, 30s resolution, 2009

2009. World Wildlife Fund (WWF). This drainage direction map for North America defines the direction of flow from each cell in the conditioned digital elevation model to its steepe... U.S. Geological Survey.

5. North America: Flow Accumulation, 15s resolution, 2009

2009. World Wildlife Fund (WWF). HydroSHEDS (Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales)flow accumulation maps define amount of upstream a... U.S. Geological Survey.

6. North America: Flow Accumulation, 30s resolution, 2009

2009. World Wildlife Fund (WWF). HydroSHEDS (Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales)flow accumulation maps define amount of upstream a... U.S. Geological Survey.

7. North America: Void-filled digital elevation model, 15s resolution, 2009

2009. World Wildlife Fund (WWF). This raster layer is a void-filled digital elevation model (DEM) of North America at 15 arc-seconds resolution. Elevation is expressed in meters an... U.S. Geological Survey.

8. Topographic and Bathymetric Shaded Relief of North America

2005. National Atlas of the United States. The Topographic and Bathymetric Shaded Relief of North America map layer shows depth and elevation ranges using colors, with relief enhanced by sha... National Atlas of the United States.