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Recent Updates
Illinois Coordinate System of 1983: 33 Zone
- New!
Illinois Sinkhole Areas
- New dataset added!
Illinois Sinkhole Points
- New dataset added!
Frequently Requested Data
Illinois Height Modernization Program (ILHMP): LiDAR Data
Location Points from the ISGS Wells and Borings Database
2011 Illinois Department of Transportation (IDOT) Orthophotos
1937 - 1947 Historical Aerial Photographs
