DEM/DLG data warehouse

DEM

Digital Elevation Models  (Data: 7.5 minute quadrangles, Scale/Resolution: 30m resolution; 1:250,000, 1:2,000,000, 1:24,000, Coverage: complete, Cost: free download from the USGS, Format: SDTS). You can use Arcview SDTS extension to corvert SDTS into shape file.
Digital Elevation Models data of SC provided by University of South Carolina 

Digital Chart of the World Data Server  A worldwide data set downloadable at the country level in ArcInfo e00 format

Data from Selected U.S. Geological Survey National Stream Water-Quality Monitoring Networks (WQN)

GAP DEM model   (Scale/Resolution: unknown, Coverage: California, Cost: free download from CA GAP site, Format: Arc/Info)
 
Global Elevation (30 arc second)
Global Elevation (5 min)
Global Elevation (10 min)

DLG

7.5 minute digital line graphs (boundaries, transportation, hydrography, hypsography: Scale/Resolution: 1:24,000, Coverage: complete along Colorado River; sparse data to East along border; more complete on California side, Cost: free download from the USGS, Format: SDTS)

Topodepot  Quads and more quads – CAD and GIS formats

USGS Geographic Data Download 

Stay tuned! There is more to come.
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