Online Spatial Data Sources- GEOLOGICAL MAPPING ONLINE SOURCES

USGS NATIONAL GEOLOGIC MAP DATABASE - HOMEPAGE: U. S. Geological Survey This is a PROTOTYPE version of a Database which provides access to maps and other spatially referenced data for: geology, geophysics, marine geology, earth resources, hazards, geochemistry, and geochronology.  (http://ngmdb.usgs.gov/)
GEOLOGIC DATA SYSTEMS: Tectonic map of the world, and other products, from Geologic  Data Systems, Inc. 1600 Emerson Street Denver, CO 80218.  (http://www.gdata.com/)
COLORADO GEO-SCIENCES TEAM HOME PAGE: Bureau of Land Management, Colorado State Office.  Information on their mapping program, a description of their GIS activities, a listing of data formats, a caveat about geospatial data, BLM Information, etc.  (http://coweb.co.blm.gov/gishome.htm)
USGS - WOODS HOLE FIELD CENTER: SEAFLOOR MAPPING SERVER, USGS: Marine and Coastal Geology Program, Seafloor Mapping Server, Woods Hole, MA (http://kai.er.usgs.gov/)
USGS NATIONAL COOPERATIVE GEOLOGIC MAPPING PROGRAM,  U.S. Department of the Interior:  Information about the geologic mapping program: Program Summary List of management staff 1996 Federal Advisory Committee report on the Program .  (http://ncgmp.usgs.gov/)

Online Spatial Data Sources - FEDERAL GOVERNMENT RESOURCES

THE UNITED STATES GEOLOGICAL SURVEY: (http://www.usgs.gov/). Home of the National Mapping Division, host for the Federal Geographic Data Committee (http://fgdc.er.usgs.gov/), the National Spatial Data Infrastructure, and headquarters for the data archive at the EROS Data Center (http://edcftp.cr.usgs.gov/).
THE UNITED STATES CENSUS BUREAU,  Department of Commerce: Home of the TIGER data for computer mapping.  (http://www.census.gov/)
TERRASERVER: An amalgam of government and private-sector companies, this site is part of the Microsoft network, in collaboration with the USGS, Compaq, Storage Works and Spin-2.  The site allows users to download aerial photos and satellite images, searchable by name or location in a variety of scales.  Claiming to be the largest online database, it contains over 3 TeraBytes of digital information. Very cool!  (http://www.terraserver.microsoft.com/)
NATIONAL GEOPHYSICAL DATA CENTER: Location for all sorts of geologial and earth resources information and data. (http://www.ngdc.noaa.gov/ngdc.html)
NATIONAL OCEAN SERVICE: Center of information for mapping and charting of ports and oceans etc. (http://www.nos.noaa.gov/)
NATIONAL IMAGERY AND MAPPING AGENCY. The Agency's site provides ready access to the world's imagery, imagery intelligence and geospatial information.  (http://164.214.2.59/)
DEFENSE MAPPING AGENCY TERRAIN MAPPING PROJECT OFFICE: Data collections and information on terrain mapping. (http://164.214.2.53:8001/)
NASA: Source of much existing data, and includes details of planned future systems. Many links
to follow, including a master data base to facilitate searching. (http://www.nasa.gov/)