Identification_Information: Citation: Citation_Information: Originator: Illinois State Geological Survey Publication_Date: 1998 Title: Glacial Boundaries in Illinois Edition: 20040423 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: ISGS GIS Database Issue_Identification: GISDB_QTGEO.IL_Glacial_Bndys_Py Publication_Information: Publication_Place: Champaign, Illinois Publisher: Illinois State Geological Survey Online_Linkage: http://www.isgs.illinois.edu/ Online_Linkage: http://illinois.edu Description: Abstract: This is an SDE feature class containing glacial boundary polygons representing the extent of glaciation for major glacial episodes in Illinois. Data are originally from the Quaternary Deposits in Illinois (1:500,000) map by Lineback (1979). Data have been subsequently modified to conform with the reclassification by Hansel and Johnson, ISGS Bulletin 104 (1996). Glacial episode is identified for each polygon. The data include the Wisconsin, Illinois and the Pre-Illinois episodes. Areas not glaciated are also identified. The nominal scale is 1:500,000. Purpose: The data are appropriate as a statewide overview of the extent of the major glacial episodes in Illinois. 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. Supplemental_Information: Origin of the data: This layer originated with the Integrated Terrain Unit (ITU) digital data set prepared for the ISGS by Environmental Systems Research Institute, Inc. (ESRI) of Redlands, California in 1984. The ITU manuscript synthesizes and organizes natural resource information for the state. Data included are natural divisions, bedrock geology, Quaternary geology, STACK units, glacial boundaries, soul associations, SCS land resource areas, ecoregions, and potential natural vegetation. The mapping resolution was generally 640 acres. Waterbodies were mapped to a minimum size of 320 acres. Data were integrated in the following order: Quaternary geology, stack units, glacial boundaries, bedrock geology, soil associations, natural divisions, potential natural vegetation, SCS land resource areas, and finally ecoregions. Recent updates to the data: In April 2004 edition 1.1 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. Edition 1.0 of these data were reviewed for internal logical consistency in May, 1998. As a result, tics were replaced, COVER-ID values were recalculated to be unique, and major revisions were made to polygon boundaries and attributes. See logical consistency report and process steps for May, 1998 for more details. The updated data set was edition 1.1. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1996 Currentness_Reference: publication date of ISGS Bulletin 104. Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -91.513518 East_Bounding_Coordinate: -87.495214 North_Bounding_Coordinate: 42.508348 South_Bounding_Coordinate: 36.969972 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: geology Theme_Keyword: glacial Theme_Keyword: glaciation Theme_Keyword: glacier Theme_Keyword: boundary Theme_Keyword: boundaries Place: Place_Keyword_Thesaurus: none Place_Keyword: Illinois Temporal: Temporal_Keyword_Thesaurus: none Temporal_Keyword: Quaternary Temporal_Keyword: Wisconsinan Temporal_Keyword: Illinoian Temporal_Keyword: Pre-Illinoian Access_Constraints: 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. Use_Constraints: 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. Point_of_Contact: Contact_Information: Contact_Instructions: Please refer to the Distribution Information section. Native_Data_Set_Environment: ArcSDE 9.1 on Oracle 10g Cross_Reference: Citation_Information: Title: ISGS Terms of Use Online_Linkage: http://www.isgs.illinois.edu Cross_Reference: Citation_Information: Title: University of Illinois Web Privacy Notice Online_Linkage: http://www.vpaa.uillinois.edu/policies/web_privacy.cfm Cross_Reference: Citation_Information: Title: University Copyright Policy (stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4) Online_Linkage: http://www.uillinois.edu/trustees/rules.cfm#sec34 Cross_Reference: Citation_Information: Title: Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign Online_Linkage: http://www.fs.uiuc.edu/cam/CAM/viii/viii-1.1.html Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Data set information was reviewed by ISGS Staff. Information included is accurate in regard to Hansel and Johnson, ISGS Bull. 104. There are no known polygon attribute values outside the appropriate value domains. Logical_Consistency_Report: Polygon and chain-node topology was present in the source coverage. Typically, ISGS Arc/Info coverages are checked for complete chain-node topology (no dangling arcs, except where appropriate), polygon labels (one per polygon, except for universal polygon), boundary values appropriate for map projection and map units, and appropriate "fuzzy" tolerances. Completeness_Report: All known episodic boundaries that can be appropriately mapped at a scale of 1:500,000 are shown. There may exist site-specific studies containing more recent data that are not included here. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: In the ITU data preparation process, glacial boundary lines were adjusted to the boundaries of till members of a Quaternary geology overlay produced during the integration of stack-units and Quaternary geology units. In areas where glacial till was absent (i.e., bedrock, loess, and silt areas) the glacial boundaries were left unchanged. No quantitative assessment of horizontal accuracy is available. These data are intended to show a general statewide overview of the areal extent of glacial episodes. Use at scales greater than 1:500,000 is discouraged. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: J.A. Lineback, Illinois State Geological Survey Publication_Date: 1979 Title: Quaternary Deposits of Illinois Edition: 1.0 Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Champaign, Illinois, USA Publisher: Illinois State Geological Survey Source_Scale_Denominator: 500000 Type_of_Source_Media: unknown (paper or mylar) Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1979 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: none Source_Contribution: linework and attributes Source_Information: Source_Citation: Citation_Information: Originator: Willman, H.B. Publication_Date: 1967 Title: Geologic Map of Illinois Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Champaign, Illinois, USA Publisher: Illinois State Geological Survey Source_Scale_Denominator: 500000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1976 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: none Source_Contribution: unknown Source_Information: Source_Citation: Citation_Information: Originator: Hansel, A. and H. Johnson Publication_Date: 1996 Title: Wedron and Mason Groups: Lithostratigraphic Reclassification of Deposits of the Wisconsin Episode, Lake Michigan Lobe Area Geospatial_Data_Presentation_Form: report Series_Information: Series_Name: Illinois State Geological Survey Bulletin Issue_Identification: 104 Publication_Information: Publication_Place: Champaign, Illinois, USA Publisher: Illinois State Geological Survey Type_of_Source_Media: n/a Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1996 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: none Source_Contribution: new attribute values based on reclassification Process_Step: Process_Description: Created in 1984 by ESRI as part of coverage TUPYMG; DISSOLVED from TUPYMG on INFO item GLC_BND. Process_Date: 1984 Process_Step: Process_Description: Renamed to GLCBND Process_Date: unknown Process_Step: Process_Description: Data set was reviewed in May, 1998. Review was limited to internal logical consistency of attribute items. Locations of features and accuracy of item values were not checked, except in cases where possible errors became apparent as a result of logical consistency checks. No checks were performed that involved plotting of hardcopy maps and manual overlay with source materials. Some changes were made, as follows: The existing set of tics was replaced by the set of tics from the coverage RE-STATE1. These were derived from 7.5 minute quadrangle corners (data set QUAD75) and give a good distribution of tics immediately outside the state boundary. COVER-ID values were recalculated to be unique. The existing state boundary line was replaced with the boundary from coverage state for general update purposes and to remove the portion of the state boundary that lies within the Lake Michigan area. Most importantly, the spatial extent and attribute values of several polygons were changed to reflect the lithostratigraphic reclassification of deposits as described in ISGS Bulletin 104 (Hansel and Johnson, 1996). Specifically, polygons coded as Late, Middle or Early Woodfordian were amalgamated into a single polygon coded as Wisconsinan. Polygons coded as Altonian or Illinoian (undifferentiated) were amalgamated into a single polygon coded as Illinoian. Polygons coded as Kansan (undifferentiated) were recoded to Pre-Illinoian. Polygons coded as Not Glaciated were unchanged. Process_Date: 199805 Process_Step: Process_Description: Source coverage (glcbnd) 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. Process_Date: 20040423 Process_Contact: Contact_Information: Contact_Person_Primary: Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 10 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Attribute items are in typical SDE feature class format. Those requiring explanation are: GLC-BND - Identifies the glacial episode (using the boundaries and diachronic terminology of Hansel and Johnson, 1996) 2 - Wisconsin 5 - Illinois 6 - Pre-Illinois 9 - Not glaciated Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Information Office, Illinois State Geological Survey (ISGS), a division of the Institute of Natural Resource Sustainability (INRS) of the University of Illinois Contact_Address: Address_Type: mailing and physical address Address: 615 East Peabody Drive City: Champaign State_or_Province: Illinois Postal_Code: 61820 Country: USA Contact_Voice_Telephone: 217-333-4747 Contact_TDD/TTY_Telephone: 217-785-0211 Contact_Electronic_Mail_Address: isgs@isgs.illinois.edu Hours_of_Service: 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time Distribution_Liability: 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. Technical_Prerequisites: 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. Metadata_Reference_Information: Metadata_Date: 20090224 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Instructions: Please refer to the Distribution Information section. Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: The access constraints as stated for the data apply also to the metadata. Refer to the Access Constraints section of the Identification Information section. Metadata_Use_Constraints: The use constraints as stated for the data apply also to the metadata. Refer to the Use Constraints section of the Identification Information section. Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile