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37.602945
41.477282
1
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GCS_WGS_1984
Linear Unit: Meter (1.000000)
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Christopher P. Korose
Illinois State Geological Survey
217-333-7256
217-333-2830
615 East Peabody Drive
Champaign
Illinois
61820
US
korose@illinois.edu
20230710
ArcGIS Metadata
1.0
Information Office, Illinois State Geological Survey (ISGS), a division of the Institute of Natural Resource Sustainability (INRS) of the University of Illinois
217-333-4747
217-785-0211
615 East Peabody Drive
Champaign
Illinois
61820
US
isgs@isgs.illinois.edu
8:00 a.m. - 5:00 p.m., Monday-Friday, U.S. Central Time
http://illinois.edu
http://www.isgs.illinois.edu/
0.000
Enterprise Geodatabase Feature Class
REE0708_IL_Herrin_Depth_Ln
2006-01-01
2.0
Illinois State Geological Survey
Illinois State Geological Survey
Champaign, Illinois
vector digital data
ISGS GIS Database
herrn_dp
This datafile shows a generalized depth to the top of the Herrin (No. 6) Coal in Illinois. These 25-foot contours were created by Earthvision software using over 43,900 data points from the ISGS Coal Section stratigraphic database. Because the depth of the coal was contoured directly from drill hole data (as opposed to creating a map of coal elevation and subtracting it from a map of surface topography) the resulting map is essentially based on the assumption that the land surface is a level plain. Consequently, the accuracy of the map is lowest where the coal is shallowest. Limited data were available in the north central, central, and western portions of the state. The data was contoured using fault lines for control and manual adjustments were made to the contours to reflect the presence of known faults. This data set is intended for use at a scale of 1:100,000.
This data set was created as part of the ISGS GIS database to show general depth of the Herrin (No. 6) Coal seam. These data are appropriate for use in local and regional thematic analysis. The data are not appropriate as a geodetic, legal or engineering base. The data set was originally created for the purpose of producing maps of well locations in Illinois for geologic research by the ISGS and others. It serves as an important base cartographic element for many types of maps and has been widely distributed and used outside the ISGS. 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.
Data capture, compilation and database maintenance: Marge Bargh, Colin Treworgy, and other ISGS Coal Section staff Compilation and export of data to create this product: Scott Elrick, Blair Tormey, and Chris Korose Documentation: Chris Korose and Andrew Louchios Quality Review: Russ Jacobson, Scott Elrick, and Chris Korose
Christopher P. Korose
Illinois State Geological Survey - Coal Section
217-333-7256
217-333-2830
615 East Peabody Drive
Champaign
Illinois
61820
US
8:00 a.m. - 5:00 p.m., Monday-Friday
Contact this individual ONLY for specific information about the use of this data set. For general questions about distribution, or availability of other data, please contact the Information Office listed under the Distribution Information section.
Illinois
Pennsylvanian
Herrin
depth
geology
coal seams
coal
mineral
resources
geoscientificInformation
ISO 19115 Topic Categories
Pennsylvanian
Herrin
geoscientificInformation
depth
geology
coal seams
coal
mineral
resources
Illinois
Refer to the Legal Notices of Terms and Conditions of the University of Illinois Web Privacy Policy (there is a link in the Cross References section) for policy statements regarding the following: Disclaimer of Liability Disclaimer of Warranties and Accuracy of Data Disclaimer of Endorsement Disclaimer for External Links Disclaimer of Duty to Continue Provision of Data Security Choice of Law By obtaining these data you agree to the provisions of the University of Illinois Web Privacy Policy, regardless of the manner in which the information was obtained.
ISGS information must be obtained directly from the ISGS or from an authorized distributor. Be aware that ISGS information obtained from an unauthorized third party may have been altered subsequent to original distribution, or may no longer be current. Any access to these data, Web sites, computer systems, electronic services, and electronic networks is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice. Links to these are provided in the Cross References section.
ISGS information is the property of and copyrighted by the Board of Trustees of the University of Illinois with all rights reserved. University copyright policy is stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4. A link is provided in the Cross References section. Individuals or entities may make fair use of copyrighted ISGS material, such as reproducing a single figure or table, or using a brief text quotation, without obtaining formal permission, but in all cases the Illinois State Geological Survey must be credited as the source of the material. To reproduce ISGS information beyond the fair use standard, permission must be obtained from the ISGS Information Office, 615 East Peabody Drive, Champaign, Illinois 61820, 217-333-4747, isgs@isgs.illinois.edu. License fees and a license agreement may be required, depending on the proposed usage. Any use of these data is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice. Links to these are provided in the Cross References section. Map information is to be used at a scientifically and cartographically appropriate scale, that is, at a scale no greater than indicated on the map or as described in the documentation of the map or map data. Map information is not appropriate for, and is not to be used as, a geodetic, legal, or engineering base. Map information has no legal basis in the definition of boundaries or property lines and is not intended as a substitute for surveyed locations such as can be determined by a registered Public Land Surveyor. The data do not replace the need for detailed site-specific studies.
University of Illinois Web Privacy Notice
http://www.vpaa.uillinois.edu/policies/web_privacy.cfm
ISGS Terms of Use
http://www.isgs.illinois.edu
Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign
http://www.fs.uiuc.edu/cam/CAM/viii/viii-1.1.html
University Copyright Policy (stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4)
http://www.uillinois.edu/trustees/rules.cfm#sec34
Esri ArcGIS 13.1.0.41833
publication date of sources
2006-01-01
-90.607544
-87.495194
37.602897
41.477248
none
1
-90.607665
-87.495214
41.477282
37.602945
Last metadata review date: 20090619
The access constraints as stated for the data apply also to the metadata. Refer to the Access Constraints section of the Identification Information section.
The use constraints as stated for the data apply also to the metadata. Refer to the Use Constraints section of the Identification Information section.
The point-source data was compiled by ISGS staff for various projects (primarily related to coal resources, structure, and mining geology) dating back to 1938. This subset was compiled for and is available from the USGS's National Coal Resources Data System. No attempt has been made to compile all available data. This file does not represent all the well records on file at the ISGS, nor should the absence of data for one or more coals for a specific data point be interpreted to mean that those coals are not present.
The attributes of the original ArcInfo coverage were reviewed in 2006 by visual inspection of the contours for depth anomalies and comparison with earlier published depth maps. Original point-source data associated with anomalies were checked for accuracy of location, correlation, and reporting of surface and bed elevation. These reviews were performed in an iterative fashion by two or three individuals. There are no arc or polygon attribute values outside the appropriate value domains. Accuracy of point-source information is variable, depending on the source materials and the geologist. Some logs are precise measurements of thickness and depth, others may have errors or be rounded. Geologic correlations are, of course, open to other interpretations. In general: measurements from core descriptions and coal test geophysical logs are accurate to within fractions of an inch; measurements from drillers logs may be accurate to within an inch to 5 feet, depending on the equipment used and the experience of the on-site geologist; measurements from oil test geophysical logs are accurate to within +/- one foot. Formal evaluation tests have not been run, but daily hands-on experience using the data for real-life applications has proven the quality of the database. Experience suggests that less than 1% of the data contain errors that involve gross mis-location of points or mis-correlation of coals. This map did not make use of all available point-source data, but traces of previously mapped faults were used to control or modify contours. The fault traces were obtained from maps in ISGS Circulars 509, 513, 522, Report of Investigations 172, and from data provided by the Indiana Geological Survey. Small or minor fault traces that lie close to each other or to major fault lines (within approximately 1000 feet) may have been removed from the Earthvision contouring process and/or may not be shown. Faults were assumed to be vertical in the contouring process.
This is a generalized depiction of regional ground condition. Horizontal positional accuracy of the original point-source data is generally unknown. There is considerable variability depending on the source material. Some holes have surveyed locations and are accurate to within a foot, others have only description to the nearest forty acres. Overall, the database administrator estimates that most points are within 500 feet of their correct locations, but no scientific tests have been done to verify this.
Crop lines and fault lines were given a depth value of NULL
2006-01-01
Post-contouring Processing 1. The Earthvision grid was exported to an Arc line coverage and clipped using the outcrop of the Herrin Coal. 2. The Herrin outcrop arcs were copied into the coverage. 3. Items for the .PAT and the .AAT files were added to the coverage. The .PAT items were: depth_herrn 8 8 N 2 The .AAT items were: depth_herrn 8 8 N 2
2006-01-01
Extraction of point-source data Data points that contained an x/y coordinate and a depth of the Herrin Coal were extracted from the coal stratigraphic data base and formatted for Earthvision.
2006-01-01
Contouring of Depth Depth of coal as reported by point-source data was contoured using Dynamic Graphic Inc.'s Earthvision software. Grid size was set to 2000 feet. Defaults were used for all other parameters. Data was contoured using fault lines for control.
2006-01-01
fault lines
Coal structure data
none
1999-01-01
Indiana Geological Survey
map, report, or data export file
coal extent outline
500000
Coal Resources of Illinois: Herrin (No. 6) Coal
none
1984-01-01
Treworgy, J.D. and M.H. Bargh
Illinois State Geological Survey
Champaign, Illinois
map
ISGS Map
same as title
publication date
1984-01-01
fault lines
The Wabash Valley Fault System in Southeastern Illinois
none
1979-01-01
Bristol, H.M. and J.D. Treworgy
Illinois State Geological Survey
Champaign, Illinois
map
Circular
509
fault lines
The Rend Lake Fault System in Southern Illinois
none
1980-01-01
Keys, J.N. and J. Nelson
Illinois State Geological Survey
Champaign, Illinois
map
Circular
513
coal extent outline
500000
Availability of the Herrin Coal for Mining in Illinois
none
2000-01-01
Illinois State Geological Survey
Champaign, Illinois
Treworgy, C.G., C.P. Korose, and C.L. Wiscombe
map
Illinois Minerals
120
publication date
2000-01-01
All attribute information
Coal Stratigraphic Data
none
2006-01-01
Illinois State Geological Survey
Champaign, Illinois
ISGS Coal Section
map
ISGS Map
same as title
publication date
2006-01-01
fault lines
The Cottage Grove Fault System in Southern Illinois
none
1981-01-01
Nelson, W.J. and H.F. Krausse
Illinois State Geological Survey
Champaign, Illinois
map
Circular
522
fault lines
Structural History of the Centralia Area
none
1954-01-01
Brownsfield, R.L.
Illinois State Geological Survey
Champaign, Illinois
map
Report of Investigations
172
0
REE0708_IL_Herrin_Depth_Ln
Feature Class
0
OBJECTID
FID
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
DEPTH_FEET
Average depth, in feet, of the top of the Herrin Coal
DEPTH_FEET
Double
8
38
8
SHAPE
Feature geometry.
ESRI
Coordinates defining the features.
Shape
Geometry
8
0
0
Shape_Leng
Shape_Leng
Double
8
38
8
source_organization
Source Organization
String
255
0
0
dataset_name
Dataset Name
String
255
0
0
hyperlink
Link
String
255
0
0
dateupdated
Date Last Updated
String
255
0
0
source_ID
Source ID
String
255
0
0
st_length(shape)
st_length(shape)
Double
0
0
0
Attribute items are in typical ARC/INFO feature class format. User-defined attributes are: Polyline attributes: DEPTH_FEET - Average depth, in feet, of the top of the Herrin Coal. The contour interval is 25 feet (e.g. 100, 125, 150, etc.). Null values represent crop outline or fault lines.
dataset
EPSG
6.18.3(9.3.1.2)
Simple
FALSE
0
TRUE
FALSE