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Big Ten Academic Alliance Geoportal

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You searched for: Collection Illinois Geospatial Data Clearinghouse Remove constraint Collection: Illinois Geospatial Data Clearinghouse Time Period 1950-1999 Remove constraint Time Period: 1950-1999
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1.
Bedrock Geology of Illinois - Geologic Units, 2004

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...

2.
Buried Bedrock Surface: Illinois, 2004

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...

3.
County Boundaries: Illinois, 2003

County Boundaries: Illinois, 2003

1968-1979. 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...

4.
Digital Elevation Model (DEM) at 1:250,000: Illinois, 2006

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 ...

5.
Digital Orthophoto Quadrangle (DOQ) Data: Illinois, 1998 - 2001

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

1998-2001. 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...

6.
Driftless Areas: Illinois, 2004

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...

7.
Glacial Drift: Thickness and Character: Illinois, 2004

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...

8.
Major Bedrock Valleys: Illinois, 2004

Major Bedrock Valleys: Illinois, 2004

1994. Illinois State Geological Survey. This feature dataset shows continuous lines representing the lowermost elevations/locations of (buried) bedrock valleys in the state of Illinois. A...

9.
National Wetlands Inventory: Illinois, 1987

National Wetlands Inventory: Illinois, 1987

1980-1987. U.S. Fish and Wildlife Service, Illinois Department of Natural Resources, and Illinois Natural History Survey. This feature dataset contains wetlands and deepwater habitats in Illinois is of 1987 based on U.S. Fish and Wildlife Service National Wetlands Inve...

10.
One-Hundred and Five-Hundred Year Floodzones for Unincorporated Areas: Illinois, 2006

One-Hundred and Five-Hundred Year Floodzones for Unincorporated Areas: Illinois, 2006

1996. Illinois State Water Survey. This feature class was quickly assembled from old Arc/Info coverages to produce a general graphic image and has not reviewed or quality-controlled ...

11.
Physiographic Divisions: Illinois, 2004

Physiographic Divisions: Illinois, 2004

1993. Illinois State Geological Survey. This is an ESRI feature class showing boundaries for physiographic divisions in Illinois. Data are originally from ISGS Report of Investigations 12...

12.
PLSS Indian Treaty Boundary Lines: Illinois, 2003

PLSS Indian Treaty Boundary Lines: Illinois, 2003

1968-1979. 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...

13.
PLSS Townships: Illinois, 2003

PLSS Townships: Illinois, 2003

1968-1979. 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 ...

14.
Political Districts and Boundaries: Illinois, 2006 and 2007

Political Districts and Boundaries: Illinois, 2006 and 2007

1980-2009. Various, by feature class. This feature dataset contains data layers that show political districts and boundaries in Illinois, including political townships, state representa...

15.
Polygon

Political Townships: Illinois, 2009

1985. Tom Heavisides, Office of Realty and Environmental Planning. This map shows political township boundaries of Illinois.

16.
Mixed

Potential of Agricultural Chemical Contamination of Aquifers, 2004: Illinois

1995. Donald A. Keefer, Illinois State Geological Survey. This is a statewide SDE feature dataset for evaluating the potential for contamination of shallow aquifers by pesticides and nitrate. The sources o...

17.
Public Land Survey System (PLSS) Boundaries: Illinois, 2003

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

1968-1979. 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...

18.
Quaternary Deposits: Illinois, 1979

Quaternary Deposits: Illinois, 1979

1979. Illinois State Geological Survey. Digital representation of the Quaternary Deposits in Illinois map by Lineback (1979). Map scale is 1:500,000. Shows Quaternary deposits that lie at...

19.
Mixed

Quaternary Deposits: Illinois, 1996

1996. Barb Stiff. This feature dataset is a generalized version of Quaternary Deposits of Illinois. Updated to reflect the areal distribution of the Wedron and Mason...

20.
Shaded Relief map: Illinois, 2006

Shaded Relief map: Illinois, 2006

1995. Abert, Curtis C. This raster dataset shows the landforms of Illinois with a shaded relief portrayal. Cell size is 301 feet and nominal map scale is 1:250,000. The d...