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36 Titles Match Your Query
Showing 1 through 36 of 36
1. A Directory of Illinois Nature Preserves [IGDNR_NATPRES]
This data set depicts the nature preserves of Illinois, digitized from USGS 7.5 minute quadrangles. A nature preserve is an area of land or water in public or private ownership that is ...


2. Aquifer Sensitivity to Contamination by Nitrate Leaching in Illinois [IGDNR_NO3AQSENS]   CHILD DIFs
This data set was designed for statewide evaluation of agrichemical leaching characteristics and associated aquifer sensitivity to contamination. It was created to classify soils ...


3. Aquifer Sensitivity to Contamination by Pesticide Leaching in Illinois [IGDNR_PESTAQSENS]   CHILD DIFs
This data set was designed for statewide evaluation of agrichemical leaching characteristics and associated aquifer sensitivity to contamination. It was created to classify soils ...


4. Bedrock Geology of Illinois [IGDNR_BEDGEO]
This map shows the distribution and extent of the bedrock geologic units within the State of Illinois, as depicted on the Geologic Map of Illinois (1967) by Willman and others, published ...


5. Bedrock Valleys of Illinois [IGDNR_ALLST_BEDVAL]
This data set shows continuous lines representing the lowermost elevations/locations of (buried) bedrock valleys in the state of Illinois. Additionally, names of buried valleys are annotated. ...


6. Coal Stratigraphic Data [IGDNR_ALLST_COALSTRAT]
ASCII database of stratigraphic information for the Danville, Herrin, and Springfield Coals from over 25,000 drill hole and outcrop descriptions of Pennsylvanian stratigraphy. Coordinates ...


7. Coarse-grained Materials Within 50 Feet of the Ground Surface in Illinois [IGDNR_ALLST_AQ50]
This map shows the distribution of coarse-grained materials and permeable bedrock within 50 feet of ground surface in Illinois. This includes bedrock, sand and gravel, and alluvial units ...


8. Critical Trends Assessment Land Cover Database of Illinois, 1991-1995 [IGDNR_LANDCOV]
County by county land cover grid data for Illinois derived from Thematic Mapper (TM) Satellite data from the Landsat 4 sensor. Dates of the imagery used range from April, 1991 to May, ...


9. Digital Elevation Model (DEM) of Illinois at 1:250,000 [IGDNR_ALLST_INT]
This Arc/Info grid (raster) data set consists of edge-matched USGS 1:250,000 DEM tiles for Illinois. Cell size is 301 feet and cell values are elevations in meters above mean sea level ...


10. Driftless Areas in Illinois [IGDNR_DRIFTLESS]
This is an Arc/Info polygon data set containing driftless areas in Illinois. These areas are analogous to areas of the state where the bedrock surface is not buried. Data are originally ...


11. Glacial Boundaries in Illinois [IGDNR_GLCBND]
This is an Arc/Info polygon data set containing glacial boundary lines representing the extent of glaciation for major glacial episodes in Illinois. Data are originally from the Quaternary ...


12. Glacial Drift in Illinois: Thickness and Character [IGDNR_DRIFTTHK]
This map is a digital Arc/Info line and polygon coverage of drift thickness in Illinois. Data are originally from ISGS Circular 490 by Piskin and Bergstrom (1975), Plate 1. Contours (lines) ...


13. Hydrologic Catalog-Units for Illinois [IGDNR_ALLST_CATUNITS]
USGS hydrologic cataloging units for the state of Illinois. The USGS has divided each state into regions, subregions, accounting units, and cataloging units. All of Illinois is in region ...


14. Illinois Soil Associations Map (500K) [IGDNR_SOILASSOC]
Soil Associations in Illinois, from the General Soil Map of Illinois (Fehrenbacher, 1982). Created in 1984 by ESRI. A soil association is a group of related soil series that generally ...


15. Landslide Inventory of Illinois [IGDNR_LNDSLD85]
This is a digital version of Plate 1 of ISGS Circular 534. This coverage shows polygon locations of landslides in Illinois. Features are described as earth slumps, slumps on bedrock, rock ...


16. Major Bedrock Aquifers Within 300 Feet of Ground Surface [IGDNR_ALLST_AQMB300]
This map shows the distribution of major bedrock aquifer units within 300 feet of ground surface containing potable water in Illinois. Major aquifers are capable of yielding 70 gallons ...


17. Major Bedrock Aquifers Within 500 Feet of Ground Surface [IGDNR_ALLST_AQMB500]
This map shows the distribution of major bedrock aquifer units within 500 feet of ground surface containing potable water in Illinois. Major aquifers are capable of yielding 70 gallons ...


18. Major Bedrock Aquifers at Depths Greater Than 500 Feet Below Ground Surface [IGDNR_AQMBG500]
This map shows the distribution of major bedrock aquifer units at depths greater than 500 feet below ground surface in Illinois. Major aquifers are capable of yielding 70 gallons of water ...


19. Major Sand and Gravel Aquifers in Illinois [IGDNR_AQMSG]
This map shows the distribution of major sand and gravel aquifers at any depth in Illinois. Generally, the tops of such aquifers lie within 300 feet of the surface and the bases occur ...


20. Nitrate Leaching Class Ranges [IGDNR_NO3LRANGE]   PARENT DIF
This is a statewide Arc/Info data set of nitrate leaching class ranges for soils in Illinois. It was generated to aid in determining aquifer sensitivity to nitrate leaching in Illinois. ...


21. Nitrate Leaching Classes of Illinois Soils [IGDNR_NO3LEACH]   PARENT DIF
This data set was designed for statewide evaluation of agrichemical leaching characteristics and associated aquifer sensitivity to contamination. It was created to classify soils ...


22. Oil and Gas Pipelines and Facilities in Illinois - Lines [IGDNR_PIPELINE]
Created in 1984 by ESRI to show distribution of oil and gas pipelines in Illinois. This Arc/Info coverage consists of line data representing oil and gas pipeline locations ...


23. Oil and gas fields in Illinois [IGDNR_ALLST_OILFIELDS]
This map shows oil and gas fields in Illinois as of 1984. Scale is 1:500,000. To show oil and gas fields. These data are appropriate for use in local and regional thematic analysis. ...


24. Pesticide Leaching Classes of Illinois Soils [IGDNR_PESTLEACH]   PARENT DIF
This data set was designed for statewide evaluation of agrichemical leaching characteristics. It was created to classify soils and aquifer settings according to predictions of leaching ...


25. Physiographic Divisions of Illinois [IGDNR_PHYSIO]
This data set records information about the Physiographic divisions of Illinois. The data set was digitized so that it could be included as an inset map on the 'Shaded Relief Map ...


26. Quaternary Deposits of Illinois [IGDNR_QUAT79]
Digital representation of the Quaternary Deposits in Illinois map by Lineback (1979). Map scale is 1:500,000. Shows quaternary deposits that lie at or near the land surface, including ...


27. Shaded Relief Map of Illinois [IGDNR_SHADEDREL]
This map shows the landforms of Illinois with a shaded relief portrayal. Nominal map scale is 1:250,000. This TIF image was derived from USGS Digital Elevation Model (DEM) data. ...


28. Slopes in Illinois Derived from the USGS Digital Elevation Model (DEM) from the Illinois State Geological Survey [IGDNR_STSLOPE]
Such data are useful in creating shaded relief images, characterizing topography and morphology, analyzing erosion potential and gross stream valley characteristics, and investigating ...


29. Stack-Unit Mapping of Geologic Materials in Illinois to a Depth of 15 Meters [IGDNR_STACK_ST]
This is an Arc/Info polygon data set containing stack-unit map designations for Illinois. The primary source is ISGS Circular 542, Stack-unit Mapping of Geologic Materials in Illinois ...


30. Statewide Surface TIN of Illinois [IGDNR_ALLST_TIN]
These data are a Triangular Irregular Network (TIN) surface topography representation for the state of Illinois. The data include all of Illinois and extend approximately nine miles beyond ...


31. Structural Features in Illinois: Areal Extent of Anticlines, Domes, and the Glasford Disturbance (Polygon Features) [IGDNR_STRUCTPOLY]
These data are for use at a scale of 1:500,000 or smaller only. They are appropriate for use in regional thematic analysis, for display purposes, and for mapping environmental phenomena ...


32. Structural Features in Illinois: Faults [IGDNR_STRUCTFAULTS]
These data are for use at a scale of 1:500,000 or smaller only. They are appropriate for use in regional thematic analysis, for display purposes, and for mapping environmental phenomena ...


33. Structural Features in Illinois: Line Features (Axial or Flexure) of Anticlines, Synclines and Monoclines [IGDNR_STRUCTCLINES]
These data are for use at a scale of 1:500,000 or smaller only. They are appropriate for use in regional thematic analysis, for display purposes, and for mapping environmental phenomena ...


34. Structural Features in Illinois: Point Locations of Impact Features, Explosion Features, Silurian Reefs, and Buried Precambrian Hills [IGDNR_STRUCTPNTS]
These data are for use at a scale of 1:500,000 or smaller only. They are appropriate for use in regional thematic analysis, for display purposes, and for mapping environmental phenomena ...


35. Woodfordian Moraines of Illinois [IGDNR_MORAINES]
This is an Arc/Info polygon data set containing named Woodfordian moraines, or Wisconsinan end moraines, of Illinois. Scale is 1:500,000. The primary source for the data is ISGS Bulletin ...


36. Buried Bedrock Surface of Illinois [IGDNR_BEDTOPO]
The Buried Bedrock Surface of Illinois map represents the first revision of the bedrock topography map since the second edition was published by the Illinois State Geological Survey (Horberg, 1957). ...


Showing 1 through 36 of 36
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