Recent updates to the data:
In April 2004 edition 1.0 of the data set was transitioned to storage in an Oracle RDBMS using the ArcSDE geodatabase model. The result (this version) is designated Edition 20040423.
Illinois State Geological Survey, 1984, Illinois Soil Associations Map (500K): ISGS GIS Database GISDB_QTGEO.IL_Soil_Associations_1984_Py, Illinois State Geological Survey, Champaign, Illinois.
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257222.
SOIL-ASC - Combined parent material (P) amd Soil association (S) codes as tabulated below
P - Soil parent material 01 - Thick loess (>60 inches) 02 - Moderately thick to thin loess (10-60+ inches) on Illinoian drift with or without paleosols 03 - Moderately thick to thin loess (20-60 inches) on Aeolian Wisconsinan loamy sands or sands 04 - Moderately thick loess (40-60 inches) on medium-to-fine-textured, Wisconsinan till or lacustrine sediments 05 - Moderately thick to thin loess or silty material (24-60+ inches) on medium-textured, Wisconsinan outwash 06 - Thin loess (10-40 inches) on loam or sandy loam, Wisconsinan till 07 - Thin loess (<20 inches) on silty clay loam, Wisconsinan till, or lacustrine sediments 08 - Thin loess (<20 inches) on silty clay or clay, Wisconsinan till, or lacustrine sediments 09 - Loamy, silty, and clayey Wisconsinan lacustrine sediments 10 - Thin loamy or silty materials on gravelly Wisconsinan outwash 11 - Thin silty or loamy materials on sandy and loamy Wisconsinan outwash 12 - Thick, sandy Wisconsinan outwash and Aeolian materials 13 - Thin to thick loess or loamy materials with or without residuum on limestone 14 - Thin to thick loess or loamy materials with or without residuum on interbedded sandstone, siltstone, and shale 15 - Sandy to clayey alluvial sediments on bottomlands 16 - Organic materials (peats and mucks) 98 - Water
S - Soil association Dark and Moderately Dark (Prairie) 01 - Port Byron-Joy 02 - Tama-Muscatine-Sable 03 - Tama-Ipava-Sable 04 - Herrick-Virden-Piasa 05 - Oconee-Cowden-Piasa 06 - Hoyleton-Cisne-Huey 07 - Winnebago-Durand-Ogle 08 - Broadwell-Waukegan-Pillot 09 - Catlin-Flanagan-Drummer 10 - Wenona-Rutland-Streator 11 - Plano-Proctor-Worthen 12 - Saybrook-Dana-Drummer 13 - Griswold-Ringwood 14 - Varna-Elliott-Ashkum 15 - Symerton-Andres-Reddick 16 - Swygert-Bryce-Mokena 17 - Clarence-Rowe 18 - Harco-Patton-Montgomery 19 - Martinton-Milford 20 - Lorenzo-Warsaw-Wea 21 - Jasper-LaHogue-Selma 22 - Sparta-Dickinson-Onarga 23 - Channahon-Dodgeville-Ashdale 24 - Lawson-Sawmill-Darwin 25 - Houghton-Palms-Muskego
Light and Moderately Dark (Forest) 31 - Seaton-Timula 32 - Fayette-Rozetta-Stronghur 33 - Alford-Muren-Iva 34 - Clinton-Keomah-Rushville 35 - Hosmer-Stoy-Weir 36 - Ava-Bluford-Wynoose 37 - Westville-Pecatonica-Flagg 38 - Middletown-Tell-Thebes 39 - Birkbeck-Sabina-Sunbury 41 - St. Charles-Camden-Drury 42 - Dodge-Russell-Miami 43 - Kidder-McHenry 44 - Morley-Blount-Beecher 45 - St. Clair-Nappanee-Frank 46 - Markland-Colp-Del Rey 48 - Casco-Fox-Ockley 49 - Martinsville-Sciotoville 50 - Oakville-Lamont-Alvin 51 - Ritchey-New Glarus-Palsgrove 52 - Alford-Goss Baxter 53 - Alford-Wellston 54 - Hosmer-Zanesville-Berks 55 - Grantsburg-Zansville-Wellston 56 - Derinda-Schapville-Elroy 57 - Haymond-Petrolia-Karnak 98 - Water
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
To spatially identify soils and soil relationships. These data are suitable for regional and statewide uses. It is suggested that these data not be used at scales greater than 1:1,000,000.The data are not appropriate as a geodetic, legal or engineering base. The data set was not and is not intended as a substitute for surveyed locations, such as can be determined by a registered Public Land Surveyor. Although useful in a GIS as a reference base layer for maps, the data set has no legal basis in the definition of boundaries or property lines.
Fehrenbacher, J.B., 1982, General Soil Map of Illinois: University of Illinois at Urbana-Champaign, Illinois Agricultural Experiment Station.
In alluvial areas, soil unit boundaries were adjusted to corresponding Quaternary geology or Stack-unit delineations. Where alluvial soil units could be verified on the Landsat scene, they were extended up drainages for a maximum of an additional 0.5 inch. Further extension would have deviated too much from the original map. When soil units meandered back and forth along drainages, they were redrafted to fit the topography and landforms. Soil units located outside of alluvial areas were not integrated unless sliver polygons were created. In order to resolve sliver polygons, the lines created from either the Quaternary geology or STACK unit maps were considered more definitive. Soil units were not changed where they extended into mined-out areas shown on either the Stack-unit or Quaternary geology maps.
The features were imported into the ISGS SDE enterprise database following steps outlined in ISGS procedure GISDB_0009.
Metadata updated.
Person who carried out this activity:
Refer to process step entries.
Refer to process step entries.
No report.
Are there legal restrictions on access or use of the data?
- Access_Constraints: none
- Use_Constraints:
- Reproduction or redistribution of copyrighted digital data sets or products derived therefrom outside of licensee's organization or entity is expressly forbidden. The only exception is redistribution to consultants working for the licensee, and then only for purposes, related to work for the licensee. Such consultants may not further reproduce or redistribute these data sets. None of these data shall be electronically duplicated on magnetic or optical media for use by others, in whole or in part, without permission of DNR.
Any hardcopies utilizing DNR data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent DNR data sets, nor to imply that changes they made were approved by DNR.
217-333-4747 (voice)
isgs@isgs.uiuc.edu
The Illinois Department of Natural Resources (DNR) provides these geographic data "as is." DNR makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. DNR further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of DNR, no warranty, expressed or implied, is made by DNR regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.In no event shall the DNR have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by DNR.
The data are intended for use with GIS software. The ISGS uses ESRI ArcGIS software, however, the ESRI shapefile format can be imported into many different GIS software packages. It is expected that customers who order this data have the technical expertise to use GIS software. The ISGS does not provide software support of any kind.
Illinois Natural Resources Geospatial Data Clearinghouse
Generated by mp version 2.8.11 on Wed Jul 11 15:10:38 2007