Structural Features - 1995

Metadata:

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

Identification_Information:

Citation:

Citation_Information:

Originator: Illinois State Geological Survey

Publication_Date: 1995

Title: Structural Features - 1995

Edition: 20040331

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: ISGS GIS Database

Issue_Identification: GISDB_BEDGEO.IL_Structural_Features_1995

Publication_Information:

Publication_Place: Champaign, Illinois

Publisher: Illinois State Geological Survey

Larger_Work_Citation:

Citation_Information:

Originator: W. John Nelson

Publication_Date: 1995

Title: Structural Features in Illinois

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: ISGS Bulletin

Issue_Identification: 100

Publication_Information:

Publication_Place: Champaign, Illinois, USA

Publisher: Illinois State Geological Survey

Other_Citation_Details: Plate 1, scale 1:500,000

Description:

Abstract:

This feature dataset is a representation of Plate 1 from ISGS Bulletin 100 (1993) by W. John Nelson. Features depicted are limited to well documented, significant faults, faulted flexures and grabens in Illinois. Names of the features and the associated directions of faulting are included. (Note: Plate 1 is dated 1993, while the full publication is dated 1995.)

Purpose:

Applications are regional or statewide studies, preferably at a scale of 1:500,000.

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.

Supplemental_Information:

These data are generally considered to supersed structural feature data compiled in ISGS Circular 519, Structural Features in Illinois - A Compendium (Treworgy,1982). The 1982 data have been preserved for historical reasons and because they include many features that are no longer considered valid, and thus are not included in ISGS Bulletin 100. Data from Circ. 519 are also available in digital format. Generally, those interested in currently recognized and named structural features should use the data associated with Bull. 100. Those interested in other possible additional structures or historical structure names may want to use the data for Circular 519. Those unsure of which data set to use should consult both Bulletin 100 and Circular 519 in order to make an informed decision.

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: 1993

Currentness_Reference: publication date of Plate 1 of Bull. 100

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -91.50537511

East_Bounding_Coordinate: -87.4319598

North_Bounding_Coordinate: 42.4976416

South_Bounding_Coordinate: 37.07536813

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: geology

Theme_Keyword: bedrock

Theme_Keyword: structure

Theme_Keyword: structural feature

Theme_Keyword: fault

Theme_Keyword: anticline

Theme_Keyword: syncline

Theme_Keyword: monocline

Theme_Keyword: graben

Theme_Keyword: flexure

Theme_Keyword: dome

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: Illinois

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_Instructions: Please refer to the distribution information.

Native_Data_Set_Environment: ArcSDE 8.2 on Oracle 9i

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The published (Plate 1) map from ISGS Bulletin 100 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 the dataset was stored as a coverage it 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.

Completeness_Report:

These four feature classes together show all well documented significant structures in Illinois as defined by ISGS Bull. 100.

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. Consult Bull. 100 and its sources for information on the derivation of structure locations.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Nelson, W. John

Publication_Date: 1993

Title: Structural Features in Illinois, Plate 1

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: ISGS Bulletin

Issue_Identification: 100

Publication_Information:

Publication_Place: Champaign, Illinois

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: 1993

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: none

Source_Contribution: line feature attributes

Source_Information:

Source_Citation:

Citation_Information:

Originator: Nelson, W. John

Publication_Date: 1993

Title:

Original Mylar Separates for Plate 1 of Structural Features in Illinois

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: ISGS Bulletin

Issue_Identification: 100

Publication_Information:

Publication_Place: Champaign, Illinois

Publisher: Illinois State Geological Survey

Source_Scale_Denominator: 500000

Type_of_Source_Media: mylar

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1993

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: none

Source_Contribution: line features

Source_Information:

Source_Citation:

Citation_Information:

Originator: Greene, Amelia V.

Publication_Date: 1990

Title:

Illinois Geographic Information System: An Index to Automated Statewide Databases

Geospatial_Data_Presentation_Form: GIS Map Index

Series_Information:

Series_Name: Illinois State Water Survey Circular

Issue_Identification: 175

Publication_Information:

Publication_Place: Champaign, Illinois

Publisher: Illinois State Water Survey

Source_Scale_Denominator: n/a

Type_of_Source_Media: paper

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1990

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: none

Source_Contribution:

Catalog data and description of related GIS data sets, used in determination of GIS structure of this data set.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Treworgy, Janis D.

Publication_Date: 1981

Title: Structural Features in Illinois - A Compendium

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: ISGS Circular

Issue_Identification: 519

Publication_Information:

Publication_Place: Champaign, Illinois

Publisher: Illinois State Geological Survey

Source_Scale_Denominator: n/a

Type_of_Source_Media: paper

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1981

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: none

Source_Contribution: unknown

Process_Step:

Process_Description:

The maps were digitized using a large format (48x60 inch) Calcomp 9100 digitizer. The digitizing was started April 7th, 1994 and completed April 11th, 1994. The weed tolerance was always set at zero during digitizing. The arcsnap was 100 feet for the line coverages. The nodesnap was 50 feet for the line coverages. The above arc and node snap distances were used in order to be certain that arcs would snap on themselves for polygon closure (eg. 2000 feet), and so the lines would not snap to themselves when short isolated arcs without closure (eg. 100 feet) were required. These tolerances prevented lines and points from snapping to themselves or other features.

Process_Date: 1994

Process_Step:

Process_Description:

A base map for digitizing was created by setting tics at the intersection of latitude / longitude lines (1 degree by 1 degree) between 88 and 91 degrees west longitude and 37 to 42 degrees north latitude. These tics were used along with reference marks on the mylar separates to coordinate the base map with the mylar map separates containing geologic structural features.

Process_Date: 1994

Process_Step:

Process_Description:

The root mean squared (rms) error during digitizing was between 0.004 and 0.008 digitizer inches. The registration points (tics) used for digitizing this map are as follows:

TIC # N. Latitude (degrees) W. Longitude (degree)

06 ~ 37 91 51 37 90 53 ~ 37 88 20 ~ 42 91 23 ~ 42 88 26 41 91 29 41 88 32 40 91 35 40 88 38 39 91 41 39 88 45 38 90 47 38 88

Note: a ( ~ ) tilde indicates the primary tics used for the statewide map.

Process_Date: 1994

Process_Step:

Process_Description:

Line features were attributed using information from Plate 1 of ISGS Bulletin 100.

Process_Date: 1994

Process_Step:

Process_Description:

In 1994-95 the coverage underwent extensive QA/QC (Quality Assurance / Quality Control) review. QA/QC was performed using paper-plots of the map to overlay on the original mylar map, on-screen checking, and data tables of the feature item values for comparing to the original map and publication. These operations were performed and reviewed by several individuals.

Process_Date: 1994

Process_Step:

Process_Description:

Source coverages (struct*) 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

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: String

Point_and_Vector_Object_Count: 137

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String

Point_and_Vector_Object_Count: 407

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point

Point_and_Vector_Object_Count: 52

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: G-polygon

Point_and_Vector_Object_Count: 89

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:

Detailed_Description:

Entity_Type:

Entity_Type_Label: GISDB_BEDGEO.IL_Struct_Feat_Clines_1995_Ln

Detailed_Description:

Entity_Type:

Entity_Type_Label: GISDB_BEDGEO.IL_Struct_Feat_Faults_1995_Ln

Detailed_Description:

Entity_Type:

Entity_Type_Label: GISDB_BEDGEO.IL_Structural_Features_1995_Pt

Detailed_Description:

Entity_Type:

Entity_Type_Label: GISDB_BEDGEO.IL_Structural_Features_1995_Py

Overview_Description:

Entity_and_Attribute_Overview:

See the metadata of the individual feature classes for specific attribute information.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Bedrock Geology Section, Illinois State Geology Survey

Contact_Voice_Telephone: 217-333-4747

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_Address:

Address_Type: mailing and physical address

Address: 615 East Peabody Drive

City: Champaign

State_or_Province: Illinois

Postal_Code: 61820

Country: USA

Contact_TDD/TTY_Telephone: 217-785-0211

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: 19980731

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_Access_Constraints: None.

Metadata_Use_Constraints: None.

Metadata_Extensions:

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

Profile_Name: ESRI Metadata Profile