Illinois State Geological Survey 1996 20040331 vector digital data ISGS GIS Database GISDB_BEDGEO.IL_Geologic_Units_500K_1967_Py Champaign, Illinois Illinois State Geological Survey The map scale is 1:500,000 http://www.isgs.illinois.edu/ http://illinois.edu H. B. Willman John C. Frye Jake A. Simon Kenneth E. Clegg D. H. Swann Elwood Atherton Charles Collinson Jerry Lineback T. C. Buschbach 1967 1967 map Geologic Maps Geologic map of Illinois 1967 edition Capitol Heights, MD, USA Williams and Heintz Map Corp. 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 Illinois (1967) by Willman and others, published by the Illinois State Geologic Survey. These data can be used for any project which requires bedrock data at a scale of 1:500,000. This data should not be used at a scale larger than 1:500,000. Not suitable for site specific work. 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. Detailed structural features are available in separate data sets. Recent updates to the data: In March 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 20040331. 1967 publication date Complete None planned -91.5826823 -87.38401652 42.49563968 36.95351896 none geology bedrock statewide Illinois basin none state Illinois none Tertiary Cretaceous Pennsylvanian Mississippian Devonian Silurian Ordovician Cambrian ISGS information must be obtained directly from the ISGS or from an authorized distributor. Be aware that ISGS information obtained from an unauthorized third party may have been altered subsequent to original distribution, or may no longer be current. Any access to these data, Web sites, computer systems, electronic services, and electronic networks is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice. Links to these are provided in the Cross References section. ISGS information is the property of and copyrighted by the Board of Trustees of the University of Illinois with all rights reserved.  University copyright policy is stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4. A link is provided in the Cross References section. Individuals or entities may make fair use of copyrighted ISGS material, such as reproducing a single figure or table, or using a brief text quotation, without obtaining formal permission, but in all cases the Illinois State Geological Survey must be credited as the source of the material. To reproduce ISGS information beyond the fair use standard, permission must be obtained from the ISGS Information Office, 615 East Peabody Drive, Champaign, Illinois 61820, 217-333-4747, isgs@isgs.illinois.edu. License fees and a license agreement may be required, depending on the proposed usage. Any use of these data is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice. Links to these are provided in the Cross References section. Map information is to be used at a scientifically and cartographically appropriate scale, that is, at a scale no greater than indicated on the map or as described in the documentation of the map or map data.  Map information is not appropriate for, and is not to be used as, a geodetic, legal, or engineering base. Map information has no legal basis in the definition of boundaries or property lines and is not intended as a substitute for surveyed locations such as can be determined by a registered Public Land Surveyor. The data do not replace the need for detailed site-specific studies. Please refer to the Distribution Information section. ArcSDE 9.1 on Oracle 10g http://www.isgs.illinois.edu http://www.vpaa.uillinois.edu/policies/web_privacy.cfm http://www.uillinois.edu/trustees/rules.cfm#sec34 http://www.fs.uiuc.edu/cam/CAM/viii/viii-1.1.html The published paper geological map from the ISGS was the source for feature attributes. Attribute code assignments were checked by three individuals and are believed to fully representative of the source document. When in coverage format, this data set was checked for complete chain-node topology (no dangling arcs, except where appropriate), boundary values appropriate for map projection and map units, and appropriate "fuzzy" tolerances. There are no known arc attribute values outside the appropriate value domains. There are 116 dangling arcs representing the endpoints of fault lines as depicted on source maps. This data set contains geologic units and fault lines as depicted on the source map. There are many additional features on the source map that are not depicted in this coverage, for example, geologic columns, cross-sections and other thematic insets. Quaternary materials are not shown. Horizontal positional accuracy of this data with respect to the source map was verified by three individuals by visual comparison (manual overlay) of source maps and hard-copy plots. Arcs within one line-width of source mylars were deemed acceptable. H. B. Willman, John C. Frye, Jake A. Simon, Kenneth E. Clegg, D. H. Swann, Elwood Atherton, Charles Collinson, Jerry Lineback, and T. C. Buschbach. 1967 map ISGS map same as title Capitol Heights, MD Williams and Heintz Map Corp. 500,000 mylar map 1967 publication date none geologic unit outlines and attributes, and fault lines. A mylar copy of this map was ordered from the publisher (William and Heintz). The mylar contained a state boundary, counties, township lines, geologic unit boundaries and labels. The map scale was 1:500,000. Unknown A TIC coverage was created by plotting a copy of the townships coverage and comparing the township lines in this plot to those on the mylar. The township intersections which corresponded within linewidth accuracy were marked and used to create a TIC coverage. unknown Larger scale PMTs were created of the mylar coverage. These PMTs were used during the digitizing process. The statewide coverage was split into 3 separate areas (for there were 3 people digitizing) These were northwest, southwest and east. The arcs were digitized for each area and the areas combined to form a statewide bedrock geology map. unknown Once the linework had been checked (several times) the coverage was built as a polygon coverage. Labels were then created using the CREATELABELS command. A plot was then generated containing the labels for each polygon as well as the arcs. This plot was then compared to the published map and a table was created containing the polygon label and the code for the designated geologic unit. This table was entered into INFO and an item was added to both the poly coverage and the info table. A relate was established and the geologic values moved to the appropriate item in the polygon PAT. unknown The final coverage is a single precision coverage and had been cleaned with a fuzzy tol of 1 and dangle of 1. It was reviewed as described under data quality information. unknown Source coverage (bedgeo) converted to double precision and reprojected to GCS_NAD83 using Workstation ArcInfo 7.2.1. The features were imported into the ISGS SDE enterprise database following steps outlined in ISGS procedure GISDB_0009. Metadata updated. 20040331 Vector G-polygon 747 0.000001 0.000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 BED-GEO - four digit numerical designator for name of geologic unit 1200 Tertiary - Undifferentiated 1360 Cretaceous - Undifferentiated 1550 Pennsylvanian - Mattoon 1880 Pennsylvanian - Bond 2120 Pennsylvanian - Modesto 2480 Pennsylvanian - Carbondale 3030 Pennsylvanian - Spoon 3540 Pennsylvanian - Abbott 3820 Pennsylvanian - Caseyville 4025 Mississippian - Upper Chesterian 4265 Mississippian - Lower Chesterian 5005 Mississippian - Upper Valmeyeran 5175 Mississippian - Middle Valmeyeran 5255 Mississippian - Lower Valmeyeran 5420 Mississippian - Kinderhookian 5810 Devonian - Upper 5880 Devonian - Middle 6170 Devonian - Lower 6700 Silurian - Undifferentiated 7390 Ordovician - Maquoketa 7550 Ordovician - Galena-Platteville 8160 Ordovician - Ancell 8420 Ordovician - Prairie du Chien 8550 Cambrian - Undifferentiated none Information Office, Illinois State Geological Survey (ISGS), a division of the Institute of Natural Resource Sustainability (INRS) of the University of Illinois mailing and physical address

615 East Peabody Drive

Champaign Illinois 61820 USA 217-333-4747 217-785-0211 isgs@isgs.illinois.edu 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time Refer to the Legal Notices of Terms and Conditions of the University of Illinois Web Privacy Policy (there is a link in the Cross References section) for policy statements regarding the following: Disclaimer of Liability Disclaimer of Warranties and Accuracy of Data Disclaimer of Endorsement Disclaimer for External Links Disclaimer of Duty to Continue Provision of Data Security Choice of Law By obtaining these data you agree to the provisions of the University of Illinois Web Privacy Policy, regardless of the manner in which the information was obtained. The data are intended for use with GIS software. The ISGS uses ESRI ArcGIS software, however, ESRI formats can be imported into many different GIS software packages. It is expected that customers who obtain these data have the technical expertise to use GIS software. The ISGS does not provide software support of any kind. 20090224 Please refer to the Distribution Information section. FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time The access constraints as stated for the data apply also to the metadata. Refer to the Access Constraints section of the Identification Information section. The use constraints as stated for the data apply also to the metadata. Refer to the Use Constraints section of the Identification Information section. http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile