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Format
Shapefile
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Access
Public
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Subject
Imagery and Base Maps
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Place
Illinois, United States
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Year
1994
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1. 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...
2. 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 ...