Loess Thickness Contours in the Alton 7.5-minute Quadrangle (Illinois portion), Illinois

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Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: David A. Grimley
Publication_Date: 1999
Title:
Loess Thickness Contours in the Alton 7.5-minute Quadrangle (Illinois portion), Illinois
Edition: 20020517
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: ISGS Digital Database
Issue_Identification: none
Publication_Information:
Publication_Place: Champaign, Illinois
Publisher: Illinois State Geological Survey
Larger_Work_Citation:
Citation_Information:
Originator: David A. Grimley
Publication_Date: 1999
Title:
Surficial Geology Map, Alton Quadrangle (Illinois portion), Madison County, Illinois
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: Illinois Geologic Quadrangle (IGQ)
Issue_Identification: Alton SG
Publication_Information:
Publication_Place: Champaign, Illinois
Publisher: Illinois State Geological Survey
Description:
Abstract:
This metadata file describes an ArcInfo line coverage and the shape file derived from the coverage. The data depict loess thickness contours in the surficial geological units of the 7.5-minute Alton quadrangle in Illinois. The contours indicate the maximum thickness of loess deposits on uneroded upland areas. Loess (wind-blown silt) generally thins away from bluffs because its source was the Mississippi-Missouri Valley. The data include the Peoria and Roxana Silts; loess does not occur over areas mapped as Cahokia Formation. The contour interval is 10 feet.

The data were published in 1999 on an ISGS Illinois Geologic Quadrangle entitled Surficial Geology Map, Alton Quadrangle (Illinois Portion) Madison County, Illinois by David Grimley. These data do not include all the information on the published map. Refer to the published map for a complete explanation of the Quaternary geology of the Alton quadrangle.

The nominal scale is 1:24,000.

Purpose:
These data are intended to be a regional overview of loess thickness in the Alton quadrangle. The data are appropriate regional thematic analysis. The data are not appropriate as a geodetic or engineering base, nor do they replace the need for detailed site-specific studies.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1999
Currentness_Reference: publication date of source map
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -90.250000
East_Bounding_Coordinate: -90.125000
North_Bounding_Coordinate: 39.000000
South_Bounding_Coordinate: 38.875000
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: geology
Theme_Keyword: surficial
Theme_Keyword: loess
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Illinois
Place_Keyword: Alton
Place_Keyword: Madison County
Stratum:
Stratum_Keyword_Thesaurus: none
Stratum_Keyword: Quaternary
Temporal:
Temporal_Keyword_Thesaurus: none
Temporal_Keyword: Quaternary
Access_Constraints: none
Use_Constraints:
Reproduction or redistribution of copyrighted digital data sets or products derived therefrom outside of licensee 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 the appropriate custodial division within 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.

These data are not to be used for commercial profit.

These data should not be used at scales greater than 1:24,000.

Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Illinois State Geological Survey
Contact_Position: GIS Database Administrator
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_Electronic_Mail_Address: isgs@isgs.uiuc.edu
Hours_of_Service: 8:00 a.m. - 5:00 p.m. Central Time, Monday-Friday
Contact_Instructions:
When contacting us, please have this metadata file readily available so we can identify the data set of interest and the individual most appropriate to assist you.
Data_Set_Credit: 
 Mapping contributions: E.D. McKay
 GIS processing:  C. Abert, D. Nelson
 Documentation:  D. Nelson
 QA/QC:  D. Nelson, C. Abert, R. Krumm
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcGIS 8.1
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: No attribute accuracy report.
Logical_Consistency_Report:
A logical consistency review was performed in May, 2002. The following checks were made:

Data set was DESCRIBED and coverage files listed to determine the feature types present. In this data set, the following feature types were found and checked: arcs and nodes. The presence of spatial indices was also checked.

For the AAT file, each ITEM was checked for the following: 

- DOMAIN of allowable values
- adherence of values to the DOMAIN
- definition of ITEMS
- requirement of all UNIQUE values for an item
- logic of ITEMS REDEFINED over other ITEMS
- length of ITEM name as regards conversion to shape file
BUILD statuses of data sets were checked, as were LABELERRORS and NODEERRORS (where appropriate), and PROJECTION definition.

The presence of a DBLBND file was verified.

The presence and location of TICS were checked.

Chain-node topology present. There are 34 dangling nodes that are consistant with the data and expected. Boundary values appropriate for map projection and map units. "Fuzzy" tolerance is zero and therefore meaningless. COVER-ID values were recalculated to be unique. There are no attribute values outside the appropriate domains.

Completeness_Report:
No completeness report. Mapping techniques are described on the published map.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: No horizontal positional accuracy report.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: No vertical positional accuracy report.
Lineage:
Process_Step:
Process_Description: no information
Process_Date: Unknown
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Complete chain
Point_and_Vector_Object_Count: 27
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 9
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
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Attribute items are in typical Arc/Info feature class format. Those requiring additional explanation are:

Arc attributes:

THICKNESS: The loess thickness. The domain of values is "20" or "30".

Entity_and_Attribute_Detail_Citation: none
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Illinois State Geological Survey
Contact_Position: GIS Database Administrator
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_Electronic_Mail_Address: isgs@isgs.uiuc.edu
Hours_of_Service: 8:00 a.m. - 5:00 p.m., Central Time, Monday-Friday
Contact_Instructions:
When contacting us, please have this metadata file readily available so we can identify the data set of interest and the individual most appropriate to assist you.
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.

Metadata_Reference_Information:
Metadata_Date: 20020521
Metadata_Review_Date: 20020521
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Illinois State Geological Survey
Contact_Person: REQUIRED: The person responsible for the metadata information.
Contact_Position: GIS Database Administrator
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_Electronic_Mail_Address: isgs@isgs.uiuc.edu
Hours_of_Service: 8:00 a.m. - 5:00 p.m. Central Time, Monday-Friday
Contact_Instructions:
When contacting us, please have this metadata file readily available so we can identify the data set of interest and the individual most appropriate to assist you.
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

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Generated by mp version 2.7.16 on Tue May 21 16:05:52 2002