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1. Public Land Survey System (PLSS) Boundaries: Illinois, 2003

1968. Illinois State Geological Survey. This data set contains Illinois Public Land Survey System (PLSS) boundaries and designations in line and polygon feature classes. THESE DATA HAVE P...

2. PLSS Townships: Illinois, 2003

1968. Illinois State Geological Survey. This dataset contains townships from the Illinois Public Land Survey System in line and polygon form. Line attributes identify state, township and ...

3. PLSS Indian Treaty Boundary Lines: Illinois, 2003

1968. Illinois State Geological Survey. This data set contains Indian Treaty boundary lines from the Illinois Public Land Survey System. The nominal scale is 1:62,500. As of 2003, the dat...

4. State Boundary: Illinois, 2003

1968. Illinois State Geological Survey. This data set contains the Illinois state boundary in line and polygon format. There are two versions of the data included: one that includes the o...

5. Structural Features: Illinois, 1995

1995. Illinois State Geological Survey. This feature dataset is a representation of Plate 1 from ISGS Bulletin 100 (1993) by W. John Nelson. Features depicted are limited to well document...

6. U.S. Geographic Names Information System (GNIS): Illinois Portion, 2006

1974. U.S. Geological Survey. This metadata document is abstracted from the GNIS metadata provided with the original data, with some ISGS-specific information added. The origina...

7. Stack-Unit Mapping of Geologic Materials to a Depth of 15 Meters: Illinois, 2004

1995. Illinois State Geological Survey. This is an SDE polygon feature class containing stack-unit map designations for Illinois. The primary source is ISGS Circular 542, Stack-unit Mappi...

8. Streams and Shorelines: Illinois, 2004

1994. Illinois Department of Natural Resources. This dataset contains data representing streams and shorelines in Illinois and portions of surrounding states as derived from US Geological Survey ...

9. Bedrock Geology: Illinois, 2005

2005. Illinois State Geological Survey. This feature dataset shows the distribution and extent of the bedrock geologic units within the State of Illinois, as depicted on the map Bedrock G...

10. Bedrock Geology of Illinois - Geologic Units, 2004

1996. Illinois State Geological Survey. This feature class shows the distribution and extent of the bedrock geologic units within the State of Illinois, as depicted on the Geologic Map of...

11. Buried Bedrock Surface: Illinois, 2004

1994. Herzog, B.L.. B.J. Stiff, C.A. Chenoweth, K.L. Warner, J.B. Sievering, C. Avery. The Buried Bedrock Surface of Illinois map represents the first revision of the bedrock topography map since the second edition was published by th...

12. County Boundaries: Illinois, 2003

1968. Illinois State Geological Survey. This data set contains Illinois county boundaries in line and polygon formats. The polygon attribute data include county name and number (FIPS) des...

13. Digital Elevation Model (DEM) at 1:250,000: Illinois, 2006

1994. Abert, Curtis C. This raster dataset consists of edge-matched USGS 1:250,000 DEM tiles for Illinois. Cell size is 301 feet and cell values are elevations in meters ...

14. Digital Orthophoto Quadrangle (DOQ) Data: Illinois, 1998 - 2001

1998. U.S. Geological Survey. This is a collection of tile-by-tile NAPP-III DOQs (1998-2001) images in MrSID format for the state of Illinois, in UTM Zones 15 and 16, NAD83. Ort...

15. Driftless Areas: Illinois, 2004

1994. Illinois State Geological Survey. This is a polygon feature class containing driftless areas in Illinois. These areas are analogous to areas of the state where the bedrock surface i...

16. Glacial Drift: Thickness and Character: Illinois, 2004

1994. Illinois State Geological Survey. This is an SDE feature dataset showing drift thickness in Illinois. Data are originally from ISGS Circular 490 by Piskin and Bergstrom (1975), Plat...

17. Height Modernization (ILHMP) LiDAR Data: Alexander County, Illinois: 2011

2011. Wilson & Company, Inc. This dataset consists of modified FEMA-grade LiDAR point cloud data for the Illinois River floodplain in the following pools: Marseilles Pool (only...

18. Height Modernization (ILHMP) LiDAR Data: Bond County, Illinois: 2015

2015. This Digital Terrain Model (DTM) data was produced all or in part from LiDAR information as of 2015. The LiDAR derived DTM covers Bond County, Illi...

19. Height Modernization (ILHMP) LiDAR Data: Boone County, Illinois: 2007

2007. This data set was developed for the United States Geological Survey. by Sanborn Mapping. Provide FEMA compliant elevation, topography and contour map of Boone County, Illinois. Provide Bare Earth DEM (vegetation removal) of Boone County...

20. Height Modernization (ILHMP) LiDAR Data: Bureau County, Illinois: 2015

2015. Surdex Corporation. This project involved fixed wing aerial LIDAR data collected at a contracted point spacing of 0.70 meters for the Illinois County of Bureau totalin...