Bedrock Geology of Illinois - Geologic Units

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: 1996

Title: Bedrock Geology of Illinois - Geologic Units

Edition: 20040331

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: ISGS GIS Database

Issue_Identification: GISDB_BEDGEO.IL_Geologic_Units_500K_1967_Py

Publication_Information:

Publication_Place: Champaign, Illinois

Publisher: Illinois State Geological Survey

Other_Citation_Details: The map scale is 1:500,000

Larger_Work_Citation:

Citation_Information:

Originator: H. B. Willman

Publication_Date: 1967

Title: Geologic Map of Illinois

Edition: 1967

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: Geologic Maps

Issue_Identification: Geologic map of Illinois 1967 edition

Publication_Information:

Publication_Place: Capitol Heights, MD, USA

Publisher: Williams and Heintz Map Corp.

Originator: John C. Frye

Originator: Jake A. Simon

Originator: Kenneth E. Clegg

Originator: D. H. Swann

Originator: Elwood Atherton

Originator: Charles Collinson

Originator: Jerry Lineback

Originator: T. C. Buschbach

Description:

Abstract:

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.

Purpose:

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.

Supplemental_Information:

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.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1967

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -91.5826823

East_Bounding_Coordinate: -87.38401652

North_Bounding_Coordinate: 42.49563968

South_Bounding_Coordinate: 36.95351896

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: geology

Theme_Keyword: bedrock

Theme_Keyword: statewide

Theme_Keyword: Illinois basin

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: state

Place_Keyword: Illinois

Temporal:

Temporal_Keyword_Thesaurus: none

Temporal_Keyword: Tertiary

Temporal_Keyword: Cretaceous

Temporal_Keyword: Pennsylvanian

Temporal_Keyword: Mississippian

Temporal_Keyword: Devonian

Temporal_Keyword: Silurian

Temporal_Keyword: Ordovician

Temporal_Keyword: Cambrian

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 distribution information.

Data_Set_Credit:

Native_Data_Set_Environment: ArcGIS 9.1 on Windows

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

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.

Logical_Consistency_Report:

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.

Completeness_Report:

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.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

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.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator:

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.

Publication_Date: 1967

Title: Geologic Map of Illinois

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: ISGS map

Issue_Identification: same as title

Publication_Information:

Publication_Place: Capitol Heights, MD

Publisher: Williams and Heintz Map Corp.

Source_Scale_Denominator: 500,000

Type_of_Source_Media: mylar map

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1967

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: none

Source_Contribution:

geologic unit outlines and attributes, and fault lines.

Process_Step:

Process_Description:

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.

Process_Date: Unknown

Process_Step:

Process_Description:

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.

Process_Date: unknown

Process_Step:

Process_Description:

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.

Process_Date: unknown

Process_Step:

Process_Description:

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.

Process_Date: unknown

Process_Step:

Process_Description:

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.

Process_Date: unknown

Process_Step:

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Process_Description:

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.

Process_Date: 20040331

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:

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

Entity_and_Attribute_Detail_Citation: none

Detailed_Description:

Entity_Type:

Entity_Type_Label: IL_Geologic_Units_500K_1967_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: BED_GEO

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Illinois State Geological Survey, Bedrock Geology Section

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

Contact_Instructions:

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

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_Date: 20030410

Metadata_Contact:

Contact_Information:

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_Use_Constraints: None

Metadata_Extensions:

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

Profile_Name: ESRI Metadata Profile

Metadata_Access_Constraints: None

Spatial_Data_Organization_Information:

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: G-polygon

Point_and_Vector_Object_Count: 747

Direct_Spatial_Reference_Method: Vector

Illinois Natural Resources Geospatial Data Clearinghouse