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USGS National Center for EROS
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GeoTIFF
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Subject
Imagery and Base Maps
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Subject
Topographic maps
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Alaska
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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.