Welcome to the ISGS Resources Site
Explore to find commonly requested ISGS maps and data.
The Coal Mines in Illinois Viewer illustrates a general depiction of underground mining in the state.
The Illinois Oil and Gas Resources map (ILOIL) provides online access to oil and gas related wells.
The Illinois Water and Related Wells map (ILWATER) provides access to water and monitoring wells, engineering borings, and outcrops online.
The Online Handbook of Illinois Stratigraphy wiki (ILSTRAT) provides the most up-to-date information on the stratigraphy of Illinois.
The Illinois Public Land Survey System (PLSS) lets users enter an Illinois address to determine its township, range, and section description.