United States Geological Survey (USGS)
USGS Home Page
USGS FGDC Catalog of Data Products
Federal Geographic Data Committee Home Page
USGS Satellite Photographs
Mid-Continent Mapping Center @ Rolla, Missouri
Water Resources of the United States

U.S. Naval Observatory
U.S. Naval Observatory Master Clock

National Geodetic Survey (NGS)
NGS Web Page
Survey Control Data Sheets

Corps of Engineers
Corpscon software, instructions and FAQs

National Archives and Record Administration
Research everything from the Declaration of Independence to old maps of the Geologic Survey

Bureau of Land Management (BLM)
BLM Web Page
Distribution of spatial data from BLM, US Forest Service and US National Land Systems.

Federal Emergency Management Agency - FEMA
FEMA Elevation Certificate
The FEMA Flood Maps

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