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Public
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Place
Illinois, United States
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Data type
Polygon
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Year
1994
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1. 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...
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 ...