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United States Geological Survey (USGS)

USGS Home Page
USGS FGDC Catalog of Data Products
Federal Geographic Data Committee Home Page
EROS Data Center, Declassified Satellite Photographs, etc.
Mid-Continent Mapping Center @ Rolla, Missouri
Water Resources of the United States
GNIS Home Page

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U.S. Naval Observatory

U.S. Naval Observatory Master Clock

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National Geodetic Survey (NGS)

NGS Web Page
Survey Control Data Sheets
Software

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Corps of Engineers

Corpscon software, instructions and FAQs

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National Archives and Record Administration

Research everything from the Declaration of Independence to old maps of the Geologic Survey

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Bureau of Land Management (BLM)

BLM Web Page
Distribution of spatial data from BLM, US Forest Service and US National Land Systems.
Public Land Survey System (PLSS) of the United States.
BLM sponsored site for learning the Cadastral Data Content Standard

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Federal Emergency Management Agency - FEMA

FEMA Elevation Certificate
The FEMA Flood Map Store

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Central Intelligence Agency (CIA)

CIA Publications (World Maps & Facts Book 2004)

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Access to USGS data:

1:24,000 SDTS; 1:100,000; 1:250,000; 1:2,000,000
1:100,000 DLG
1:2,000,000 DLG
1:250,000 DEM

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