Regional Agencies/Groups

• United States Geological Survey
• CMAP
• US Census Bureau
• FEMA
• IDNR
• National Geodetic Survey 

Other Counties GIS

• Cook County, IL
• DeKalb County, IL
• DuPage County, IL
• Kane County, IL
• Lake County, IL
• Will County, IL
• Kenosha County, WI
• Walworth County, WI

Associations/Companies

• ESRI
• ILGISA
• URISA

Further Learning

• Kids Glossary of Map and GPS Terms
• Working With GIS data? Librarians Can Help With That
• World Geography, Cartography and Mapping Skills