Explore our online, interactive tools that provide access to Illinois geologic data and mapping resources.
ILMINES
The Coal Mines in Illinois Viewer details underground coal mining sites across the state, with data on coal companies, mine names, mine numbers, years of operation, and the locations of known coal and industrial mines relative to nearby businesses and residences.
ILOIL
The Illinois Oil and Gas Resources Map provides access to nearly 200,000 oil and gas well records in Illinois, including known well locations and related information, through an interactive map.
ILWATER
The Illinois Water and Related Wells Map provides access to records from more than 700,000 wells across Illinois, including private water wells, engineering and stratigraphic borings, and related data.
ILHAP
The Illinois Historical Aerial Photography archive provides access to photographs from across Illinois, allowing exploration of collections spanning several time periods through an interactive map.
ILSTRAT
The Online Handbook of Illinois Stratigraphy provides current information on the historical rock and soil layers of Illinois through hundreds of easily-accessible articles that describe stratigraphic units.
PLSS
The Illinois Public Land Survey System provides township, range, and section descriptions, along with additional details such as county, precinct, and USGS quadrangle name, for user-specified addresses within Illinois.
Geophysics Data
The Geophysics Data Viewer provides public access to geophysical data collected by ISGS over decades. The interactive map displays data points and profiles from various methods, including electrical, seismic, and electromagnetic, that help researchers study subsurface conditions.