Glacial Boundaries in Illinois

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information
• Spatial_Data_Organization_Information

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

Description:

Abstract:

This is an ESRI 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

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: 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.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Instructions: Please refer to the distribution information.

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -91.513518

East_Bounding_Coordinate: -87.495214

North_Bounding_Coordinate: 42.508348

South_Bounding_Coordinate: 36.969972

Native_Data_Set_Environment: ArcGIS 9.1 on Windows

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.

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 converted to double precision and reprojected to GCS_NAD83 using Workstation ArcInfo 7.2.1.

Metadata updated.

Process_Date: 20040423

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: ISGS staff

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

Detailed_Description:

Entity_Type:

Entity_Type_Label: IL_Glacial_Bndys_Py

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: GLC_BND

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Illinois State Geological Survey, Quaternary Geology Section

Contact_Instructions:

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.uiuc.edu

Hours_of_Service: 8:00 a.m. - 4:30 p.m., Monday - Friday, U.S. Central Time

Distribution_Liability:

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.

Technical_Prerequisites:

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.

Metadata_Reference_Information:

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Instructions: Please refer to the distribution information.

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Date: 20060831

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile

Metadata_Access_Constraints: None.

Metadata_Use_Constraints: None.

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

Illinois Natural Resources Geospatial Data Clearinghouse