Illinois State Geological Survey GIS Available Data

County GIS Data

Henry Surface Topography	Madison Surficial Geology	Whiteside Surficial Geology
Henry Surficial Geology	Madison Surficial Geology	St Clair Surficial Geology
Lake Surface Topography

Alton	Elgin	Lacon	Prairietown
Ames	Elmhurst	Lake Calumet	Putnam
Antioch	Elsah	Libertyville	Red Bud
Arlington Heights	Englewood	Maple Park	River Forest
Berwyn	Evanston	Marine	Rome
Bethalto	French Village	Marion	Sag Bridge
Blue Island	Geneva	Mascoutah	Spring Bay
Calumet City	Grafton	Metropolis	St. Jacob
Carbondale	Grantfork	Mokena	Tinley Park
Chicago Loop	Grayslake	Monks Mound	Wauconda
Chillicothe	Hampshire	New Athens East	Welge
Collinsville	Harvey	New Douglas	Wheeling
Columbia	Herod, Shetlerville	Oak Hill	Wood River
Crab Orchard	Herrin	Paderborn	Worden
Crab Orchard Lake	Highland	Palos Park	Cave-In-Rock, Dekoven, Repton, Saline Mines
Crystal Lake	Highland Park	Park Ridge	Frankfort, Manhattan
Dunlap	Hinsdale	Pingree Grove	Karbers Ridge, Rosiclare
Dyer, Steger	Jackson Park	Pittsburg	Naperville
Elburn	Johnston City