Big Ten Academic Alliance Geospatial Discovery Portal

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1.
Bedrock Geology: Illinois, 2005

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...
2.
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...
3.
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...
4.
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...
5.
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 ...
6.
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...
7.
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...
8.
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...
9.
Height Modernization (ILHMP) LiDAR Data: Alexander County, Illinois: 2011

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...
10.
Height Modernization (ILHMP) LiDAR Data: Bond County, Illinois: 2015

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...