GIS Links -- Data and Information

ESRI
    ArcData -- various links to GIS data
    ArcScripts
    ESRI homepage
    Free software, data, and resources

Illinois
    Illinois Natural Resources Geospatial Data Clearinghouse -- AI export files, DRGs

Iowa
    Department of Natural Resources -- AI export files, shapefiles

Hawaii
    Hawaii Data Clearinghouse
    Hawaii Statewide GIS Program

Kansas
    Kansas Geospatial Community Commons

Michigan
    Michigan Geographic Data Library

Minnesota
    Minnesota DNR Data Deli

Missouri
    Missouri Spatial Data Information Service -- AI export files, DRGs

National Atlas
   National Atlas Home Page
    Raw Data Download

National Park Service
    GIS Data and Information Data Clearinghouse

Nebraska
    Nebraska Geospatial Data Center
    Conservation and Survey Division, University of Nebraska-Lincoln -- GIS Datasets
    Conservation and Survey Division -- DRGs

North Dakota
    North Dakota Geographic Information Systems

Purdue University
    Watershed Delineation

United Nations Environment Programme
    GEO Data Portal

U. S. Bureau of Land Management
    Geospatial Info Center

U. S. Environmental Protection Agency
    Geospatial Data Clearinghouse

U. S. Department of Agriculture / NRCS
    Geospatial Data Gateway

U. S. Geological Survey
    EarthExplorer
    Eros Home Page
    GISDATA Web Portal  
    Global Visualization Viewer (GloVis)
    Photo Finder
    Seamless Data Distribution System
    US GeoData -- DEMs, DLGs
    Water-related datasets

U.S. Fish and Wildlife Service
    GIS Data Sets

Utah
    Utah GIS Portal

Virginia
    University of Virginia Library -- Digital Maps and Geospatial Data  

Wisconsin
    Wisconsin Dept of Natural Resources Geographic Information Systems
    Wisconsin DNR -- WebView
    Wisconsin Dept. of Administration -- GIS Services
    Wisconsin State Cartographer's Office
    WisconsinView

Wyoming
    Wyoming Spatial Data Clearinghouse -- AI export files, MI files, DRGs