Other Useful Links

ESRI SOFTWARE
http://www.esri.com/

ILLINOIS GIS ASSOCIATION (ILGISA)
http://www.ilgisa.org/

ILLINOIS NATURAL RESOURCES GEOSPATIAL DATA CLEARINGHOUSE
http://www.isgs.uiuc.edu/nsdihome/

USDA/NRCS GEOSPATIAL DATA GATEWAY
http://datagateway.nrcs.usda.gov/

SOIL SURVEY OF LOGAN COUNTY
http://soildatamart.nrcs.usda.gov/manuscripts/IL107/0/Logan_IL.pdf

OTHER COUNTY GIS SITES
http://www.gis2gps.com/GIS/illcounties/illcounties.html