1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, and 2002. 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.
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1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, and 2002. 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.
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.
1992 and 1993. Geological Survey (U.S.). This raster layer is a georeferenced grid map image of land cover characteristics for North America, excluding Hawaii, and including the Caribbean ... Geological Survey (U.S.).
1994 and 1995. National Geophysical and Solar-Terrestrial Data Center. This map shows the four types of light sources as observed in North America during 1994-1995. The Defense Meteorological Satellite Program (DMSP) O... National Geophysical and Solar-Terrestrial Data Center.
1786. Rumsey, David, 1944- and Pownall, Thomas. This layer is a georeferenced image of a map of North America orignally created by T. Pownall in 1786. The original map appears in "A general atlas... Cartography Associates.
1733. Rumsey, David, 1944- and Popple, Henry. This layer is a georeferenced image of a map of North America originally created by H. Popple in 1733. The original map appears in "A Map of the Br... Cartography Associates.
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.
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.
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.
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