GIS Data & Tools Links
- Data
- Illinois Natural Resources Geospatial Data Clearinghouse
- Critical Trends Assessment Land Cover Database of Illinois
- MESC GIS Data and Metadata
- Starting the Hunt: Guide to Mostly On-line and Mostly Free U.S. Geospatial and Attribute Data
- TerraServer
- Tree Species Distribution Maps for North America
- ArcView Extensions
- GIS Tools (Spatial Tools and Animal Movement) from USGS Alaska Biological Science Center
- Patch Analyst
- ArcInfo Add-Ons
- Other Tools
- General GIS Sites
- The GIS Primer from Pacific Meridian
- GPS
- National CORS data GPS base station data