Geospatial One-Stop (geodata.gov)
Web portal for practically all Federal Government-produced Geospatial Data

FGDC Entry Point to Geospatial Data Clearinghouse
The national Geospatial Data Clearinghouse, a collection of over 50 spatial data servers that index digital geographic data. Can be searched through a choice of interfaces.

US Bureau of Transportation Statistics
The BTS Mapping Center provides mapping and data download applications you can use to geographically analyze and retrieve all transportation geospatial data collected and maintained by the USDOT.

USGS Links to Maps and Other Products
Links to many sources of Aerial Photographs & Satellite Imagery, Digital Maps & Data, Publications, Software, etc.

USGS Geodata Download Site
Downloadable DEM (1:250,000 and 7.5'), DLG (1:2,000,000; 1,100,000 and 1:24,000), LULC data, and NHD.

USGS Status Graphics Viewer
Interactive map showing availability of USGS data products for across the country.

USDA Geospatial Data Gateway
Provides One Stop Shopping for natural resources or environmental data. Choose your area of interest, browse and select data from our catalog, customize the format, and have it downloaded or shipped on CD.

NRCS GIS and Data Sites
Natural Resources Conservation Service Link page.

National GIS Data Sets
US Fish and Wildlife Service Link page.

US Census Bureau Subject List
A to Z listing of online resources, including data, from the Census Bureau.

National Environmental Satellite, Data, and Information Service (NOAA)
Access to many Climate, Geophysical, Ocean, and Coastal data sources.

Ocean Planning Information System
Multiple data sets with an extent covering the Atlantic Ocean off the southeastern U.S. and the coastal areas of North Carolina, South Carolina, Georgia, and Florida.

Starting the Hunt, A Guide To Mostly On-line And Mostly Free U.S. Geospatial and Attribute Data
Extensive subject-oriented list of data resources.

Digital Grove Mapping
Links to many Internet sources for GIS data.

Louisiana Data Resoruces

ATLAS - Louisiana's Online GIS
ATLAS provides access to publiclly available data and information related to Louisiana, GIS data documentation, and data sharing on the World Wide Web (WWW).

LOSCO Data Catalog
The LOSCO Data Catalog is a repository for the Louisiana Oil Spill Coordinator's Office's Environmental Baseline Inventory (EBI) data holdings. Users can access and download these FREE data bundles for use in various GIS applications.