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Illinois State Geological Survey
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Illinois, United States
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1. State Plane Zones: Illinois, 2007
2007. Illinois State Geological Survey. This polygon feature class shows State Plane Coordinate System zones in Illinois.
2. UTM Zones: Illinois, 2007
2007. Illinois State Geological Survey. This polygon feature class shows UTM zones in Illinois.
3. 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...
4. Mosaic of Illinois 7.5-minute Digital Raster Graphic (DRG) Images, 2003
2003. Illinois State Geological Survey. This is a statewide ArcSDE Raster Mosaic of USGS DRG images of 7.5-minute topographic quadrangles occurring in Illinois. These are unmodified DRG i...
5. USGS Quadrangle Boundaries and Corner Points in NAD83: Illinois, 2002
1998. Illinois State Geological Survey. This feature dataset contains point, line and polygon data that describe ideal USGS quadrangle boundaries and corner points for quadrangles that in...
6. 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...
7. Stack-Unit Mapping of Geologic Materials to a Depth of 15 Meters: Illinois, 2004
1995. Illinois State Geological Survey. This is an SDE polygon feature class containing stack-unit map designations for Illinois. The primary source is ISGS Circular 542, Stack-unit Mappi...
8. Structural Features - Faults: Illinois, 1995
1995. Illinois State Geological Survey. This is a partial representation of Plate 1 from ISGS Bulletin 100 (1993). Features depicted are limited to well documented, significant faults, fa...
9. Structural Features: Illinois, 1995
1995. Illinois State Geological Survey. This feature dataset is a representation of Plate 1 from ISGS Bulletin 100 (1993) by W. John Nelson. Features depicted are limited to well document...
10. Structural Features- Line Features (Axial or Flexure) of Anticlines, Synclines and Monoclines: Illinois, 1995
1995. Illinois State Geological Survey. This is a partial representation of Plate 1 from ISGS Bulletin 100 (1993). Features depicted are limited to well documented, significant anticlines...
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