GIS, Mapping, and Data Resources

Sources for Maps, Data, and Imagery

For Illinois

Digital Orthophoto Quadrangles (DOQs)
Gamma-Ray Logs Database
Historical Aerial Photographs 1936-1941
Land Cover - Maps, Data, and Statistics
Natural Resources Geospatial Data Clearinghouse
Oil & Gas (ILOIL) Internet Map Service
Water Well (ILH2O) Data
Watershed Management Clearinghouse

Illinois and Beyond

EarthExplorer – USGS Digital Data
EROS Data Center
GIS.com
Indiana GIS Atlas
Kentucky GIS Data
Library of Congress Online Map Collection
National Atlas of the United States
National Science Foundation - Geosciences Unidata Integrated Earth Information Server (IEIS)
National Spatial Data Infrastructure (NSDI)
University of Texas-Austin, Perry-Castaneda Library Map Collection
Wisconsin State Cartographer Imagery

GIS Organizations, Newsletters, Miscellaneous

ESRI Geography Network
Federal Geographic Data Committee
GIS Monitor - on-line GIS newsletter
GIS Café - a good link for GIS info
GIS.com - a portal to GIS information on the Web
GIS Jobs Clearinghouse
GIS Development - Geospatial Resource Portal - links to many GIS sites and over 1000 GIS and geospatial research papers
Illinois GIS Association (ILGISA)
MapCruzin - Free GIS mapping program software and resources
Open Source GIS - open source and free GIS software links
U.S. Naval Observatory GPS Time Transfer
U.S. Army Corps of Engineers Research Lab - Geographic Resources Analysis Support System (GRASS) - free GIS software