USGS Science Topics > Specific things by name
Digital Elevation Model. A geospatial dataset describing topography in an area. The name refers also to a type of digital product provided by USGS.
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The shape of the land surface.
Collections of related digital information that are geographically referenced.
Representation, usually on a flat surface, of a part or whole of the Earth or other parts of the universe. Collections of maps linked digitally or bound together in a book are called atlases.