Driftless Areas 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: 1994

Title: Driftless Areas in Illinois

Edition: 20040423

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: ISGS GIS Database

Issue_Identification: GISDB_QTGEO.IL_Driftless_Areas_Py

Publication_Information:

Publication_Place: Champaign, Illinois

Publisher: Illinois State Geological Survey

Description:

Abstract:

This is a polygon feature class containing driftless areas in Illinois. These areas are analogous to areas of the state where the bedrock surface is not buried. Data are originally from the Buried Bedrock Surface map (1:500,000) by Herzog et al (1994) and the related feature class GISDB_BEDGEO.IL_Bedrock_Topography_1994_Ln.

There are no attribute data associated with the spatial data in this data set. The nominal scale is 1:500,000.

Purpose:

Appropriate applications are regional or statewide studies, preferably at a scale of 1:500,000. These data can be used in conjunction with buried bedrock surface, loess, glacial boundary, and drift thickness information to demonstrate various aspects of the unglaciated portions of 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:

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 June, 1998. As a result, tics were replaced, and COVER-ID values were recalculated to be unique. 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: 1994

Currentness_Reference: publication date of the hard copy map

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: geology

Theme_Keyword: bedrock

Theme_Keyword: driftless

Theme_Keyword: drift

Theme_Keyword: glacial

Theme_Keyword: surface

Theme_Keyword: surficial

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_Organization_Primary:

Contact_Instructions: Please refer to the distribution information.

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -90.815370

East_Bounding_Coordinate: -88.064311

North_Bounding_Coordinate: 42.510709

South_Bounding_Coordinate: 37.107953

Native_Data_Set_Environment: ArcGIS 9.1 on Windows

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: There are no user-defined attributes included with these data.

Logical_Consistency_Report:

Polygon and chain-node topology was present in the source coverage. The coverage was checked for complete chain-node topology (no dangling arcs, except where appropriate), polygon labels (one per polygon, except for universe polygon), boundary values appropriate for map projection and map units, and appropriate "fuzzy" tolerances. COVER-ID values are unique.

Completeness_Report:

All known unglaciated areas as mapped on the source map at a scale of 1:500,000 are included. There may exist site-specific studies containing more recent data that are not included here.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: no report

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator:

Herzog, B.L.. B.J. Stiff, C.A. Chenoweth, K.L. Warner, J.B. Sievering, C. Avery

Publication_Date: 1994

Title: Buried Bedrock Surface of Illinois

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: ISGS Illinois Map series

Issue_Identification: 5

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: 1994

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: none

Source_Contribution: polygon boundaries

Process_Step:

Process_Description:

Polygons for driftless areas were extracted from coverage bedtopo to create driftless-py.

Process_Date: Unknown

Process_Step:

Process_Description:

Unioned driftless-py with glacial-bndy to obtain glacial boundaries, thus creating driftless-py2.

Process_Date: 19960801

Process_Step:

Process_Description:

Renamed driftless-py2 to driftless and moved into ISGS general use GIS database.

Process_Date: 19970819

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.

Process_Date: 199806

Process_Step:

Process_Description:

Source coverage (driftless) 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_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: There are no user-defined attribute items.

Entity_and_Attribute_Detail_Citation: none

Detailed_Description:

Entity_Type:

Entity_Type_Label: IL_Driftless_Areas_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: Id

Attribute_Definition:

This field is included only because ESRI software requires at least one field in addition to the shape and OID fields. It contains no information.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Illinois State Geological Survey, Quaternary 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

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: 8

Illinois Natural Resources Geospatial Data Clearinghouse