Maps

The Illinois State Geological Survey creates and disseminates a variety of free and for-fee online geologic maps and mapping data.

Following is a comprehensive list of the many sources of maps and map data available from this and affiliated Web sites.

ISGS Paper and CD/DVD map products

Index to USGS Topographic Maps

Downloadable Maps

Latest quadrangle and county releases
Illinois Preliminary Geologic Map Series (IPGM)
Illinois County Geologic Map Series (ICGM)
Illinois Geological Quadrangle Series (IGQ)
Open File Series
EDMAP
STATEMAP

Geologic quadrangle (1:24,000 scale)
County
Regional
State

Coal Mines, Coal Geology and Resource Data
Oil and gas (ILOIL)
Hydrogeology
Bedrock
Surficial
8½ × 11 inch maps and geologic column

Data

Water-well data
Well location (QuEStoR) maps and data extracts
Well log copying services (fee)
Gamma-ray logs database
Illinois Natural Resources Geospatial Data Clearinghouse
Historical aerial photographs

Partnership Programs

Central Great Lakes Geologic Mapping Coalition
Central U.S. Earthquake Consortium State Geologists
EDMAP
STATEMAP
MIDCARB
U.S. Geological Survey National Atlas Program Information

3-Dimensional Mapping Workshops

ISGS mapping program

Story archive