County mapping is carried out at the ISGS under a variety of programs. The programs exist for different purposes and require different levels of scientific review. Maps are published in specific Series based on the program under which they were created and the corresponding level of review.

Embed a View

Search for keywords in titles, authors, descriptions, and publication year below. For more detailed searches on themes, quads, series, programs, counties, and states, click the "Advanced Search" option.

Displaying 1 - 10 of 86
Map Images Title Description Theme Series County Publication Date Authors
Surface Topography of McHenry County Surface Topography of McHenry County, Illinois Surface Topography Open File Series (OFS) McHenry 1995 Melisa M. McLean, Maureen D. Kelly, Christopher S. McGarry
Shaded Relief of Carroll County Shaded Relief of Carroll County, Illinois

1:62,500 Carroll County map; 37" x 27" single map sheet; includes map, legend, and descriptive text

 Shaded Relief Open File Series (OFS) Carroll 1997 Christopher S. McGarry
Ground Surface Topography of McLean County Ground Surface Topography of McLean County, Illinois

1:100,000 McLean County map; 43" x 26" single map sheet; includes map, legend, descriptive text and inset map

 Surface Topography Open File Series (OFS) McLean 1997 Melisa M. McLean, Matthew H. Riggs
Bedrock Topography of Carroll County Bedrock Topography of Carroll County, Illinois

1:62,500 Carroll County map; 37" x 27" single map sheet; includes map, legend, and 3 inset maps

 Bedrock Topography Open File Series (OFS) Carroll 1997 Christopher S. McGarry
Surface Slopes of Carroll County Surface Slopes of Carroll County, Illinois

1:62,500 Carroll County map; 37" x 27" single map sheet; includes map, legend, and descriptive text

 Surface Slopes Open File Series (OFS) Carroll 1997 Christopher S. McGarry
Aquifer Sensitivity of Carroll County Aquifer Sensitivity of Carroll County, Illinois

1:62,500 Carroll County map; 53" x 29" single map sheet; includes map, legend, and 3 inset maps

 Aquifer Sensitivity Open File Series (OFS) Carroll 1997 Christopher S. McGarry, David A. Grimley
Land Cover of Carroll County Land Cover of Carroll County, Illinois

1:62,500 Carroll County map; 37" x 27" single map sheet; includes map, legend, and descriptive text

 Land Cover Open File Series (OFS) Carroll 1997 Christopher S. McGarry
Location of Data Points in McLean County Location of Data Points in McLean County, Illinois

1:100,000 McLean County area map; 40" x 29" single map sheet; includes map, legend, and descriptive text

 Data Points Open File Series (OFS) McLean 1997 Melisa M. McLean, Matthew H. Riggs
Surface Topography of Carroll County Surface Topography of Carroll County, Illinois

1:62,500 Carroll County map; 37" x 27" single map sheet; includes map, legend, descriptive text, and inset map

 Surface Topography Open File Series (OFS) Carroll 1997 Christopher S. McGarry
Thickness of Quaternary Materials in McLean County Thickness of Quaternary Materials in McLean County, Illinois

1:100,000 McLean County area map; 40" x 27" single map sheet; includes map, legend, descriptive text, and inset map

 Quaternary DepositsDrift Thickness Open File Series (OFS) McLean 1997 Melisa M. McLean, Maureen D. Kelly, Matthew H. Riggs