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Overburden thickness of the Herrin Coal in Kentucky

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   U.S. Geological Survey Central Region Energy Resources Team, 2002, Overburden thickness of the Herrin Coal in Kentucky: U.S. Geological Survey Professional Paper 1625-D, U.S. Geological Survey, Denver, Colorado.

   This is part of the following larger work.

   (ed.), J.R. Hatch , and (ed.), R.H. Affolter , 2002, Resource Assessment of the Springfield, Herrin, and Danville and Baker Coals in the Illinois Basin: U.S. Geological Survey Professional Paper 1625-D, U.S. Geological Survey, Denver, Colorado.

   This is part of the following larger work.

   U.S. Geological Survey, 2002, National Coal Resource Assessment: U.S. Geological Survey Professional Paper 1625, U.S. Geological Survey, Denver, Colorado.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -88.1602

   East_Bounding_Coordinate: -86.8379

   North_Bounding_Coordinate: 37.9758

   South_Bounding_Coordinate: 37.1582

3. What does it look like?

4. Does the data set describe conditions during a particular time period?

   Calendar_Date: 1998

   Currentness_Reference: publication date

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: map

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • GT-polygon composed of chains (2337)

   2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest .001. Longitudes are given to the nearest .001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
      

7. How does the data set describe geographic features?

   w11ovrdd.dbf

   Shapefile Attribute Table

   Entity_and_Attribute_Overview:

   Areas defined as "no coal" or "Insufficient Data" are where the *position* of the coals is identifiable using the surrounding stratigraphy, but there is no coal preserved in the rock record. They are areas within the outcrop extent of the coal beds where we have data essentially demonstrating zero coal thickness. Some features may have been defined as "Unassessed." These are areas which exist within the coal extent but have not been assessed and have no value.

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • U.S. Geological Survey Central Region Energy Resources Team

2. Who also contributed to the data set?

   William Andrews, digital compiler

3. To whom should users address questions about the data?
   Kentucky Geological Survey
   c/o William Andrews
   Geologist
   228 Mining and Mineral Resources Bldg., U. of Ky.
   Lexington, Kentucky (KY) 40506-0107
   USA
   

   606-257-5500 (voice)
   606-257-1147 (FAX)
   wandrews@kgs.mm.uky.edu
   

   Hours_of_Service: 0800 -1200, 1300-1630 (eastern time), Mon-Fri.

Why was the data set created?

This coverage was created as part of the ongoing coal resource analysis studies at the Kentucky Geological Survey. The work was specifically funded by the National Coal Assessment program of the U.S. Geological Survey.

How was the data set created?

1. From what previous works were the data drawn?

   wk9eledd (source 1 of 2)

   Survey, Kentucky Geological , 19990401, Elevation of the Herrin coal bed in western Kentucky: Kentucky Geological Survey, Lexington, Kentucky.

   This is part of the following larger work.

   Survey, Kentucky Geological , in progress, Deep Coal and Energy Resources of the Western Kentucky Coal Field: Kentucky Geological Survey, Lexington, Kentucky.

   Type_of_Source_Media: digital

   Source_Scale_Denominator: 125000

   Source_Contribution: digital map of structure of Herrin coal bed

   usgsdem (source 2 of 2)

   U.S. Geological Survey, (30' x 60' digital elevation models for the Western Kentucky Coal Field): U.S. Geological Survey, Washington D.C..

   Type_of_Source_Media: digital

   Source_Scale_Denominator: 100000

   Source_Contribution: digital maps of surface elevation in study area

2. How were the data generated, processed, and modified?

   Date: 1999 (process 1 of 1)

   (1) Component digital elevation models (DEM's, 30-meter resolution) for study area compiled into single grid of surface elevation in feet. (2) Herrin coal-elevation map was subtracted from compiled DEM. (3) Grid was reclassified 0 to 150 feet, 150 to 1500 feet and greater than 1500 feet. (4) Polygons were extracted from the reclassified grid. (5) Resulting ARC/INFO coverage was converted to ArcView shapefile.

   Person who carried out this activity:
   

   William Andrews
   Kentucky Geological Survey
   Geologist
   228 Mining and Mineral Resources Bldg., U. of Ky.
   Lexington, Kentucky (KY) 40506-0107
   USA
   

   606-257-5500 (voice)
   606-257-1147 (FAX)
   wandrews@kgs.mm.uky.edu
   

   Hours_of_Service: 0800-1200, 1300-1630 (eastern time), Mon.-Fri.

3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

1. How well have the observations been checked?

   Accuracy of this data is dependent upon the accuracy of the original digital coal-bed elevation map and the accuracy of the digital elevation model (DEM) for the study area.

2. How accurate are the geographic locations?

   Accuracy of the digital data (if not revised) is based upon the the coal-bed elevation map and the digital elevation model. Horizontal positional accuracy was not independently verified for this map.

3. How accurate are the heights or depths?

4. Where are the gaps in the data? What is missing?

   This dataset is complete for the designated study area, and has been created by subtracting two other digital maps.

5. How consistent are the relationships among the observations, including topology?

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: none

Use_Constraints:

This data is appropriate for regional analysis at a scale of at least 250,000. Acknowledgment of the Kentucky Geological Survey would be expected in products derived from this data.

1. Who distributes the data set? (Distributor 1 of 1)
   USGS Information Services
   Box 25286 Denver Federal Center
   Denver, CO 80225
   USA
   

   1-888-ASK-USGS (voice)
   303-202-4693 (FAX)
   ask@usgs.gov
   

2. What's the catalog number I need to order this data set?

   USGS Professional Paper 1625-D

3. What legal disclaimers am I supposed to read?

   This Compact Disc-Read Only Memory (CD-ROM) publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
   Although all data and software published on this CD-ROM are used by the U.S. Geological Survey, no warranty, expressed or implied, is made by the U.S. Geological Survey as to the accuracy of the data and related materials and (or) the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	Geographic features and attribute data in format ArcView shapefile (version 1.0)
     Network links:	<http://energy.cr.usgs.gov/coal/nca/>

   • Cost to order the data: none

Who wrote the metadata?

Dates:

Last modified: 03-May-1999
Last Reviewed: 28-Mar-2002

Metadata author:

Kentucky Geological Survey
c/o William Andrews
Geologist
228 Mining and Mineral Resources Bldg., U. of Ky.
Lexington, Kentucky (KY) 40506-0107
USA

606-257-5500 (voice)
606-257-1147 (FAX)
wandrews@kgs.mm.uky.edu

Hours_of_Service: 0800-1200, 1300-1630 (eastern time), Mon.-Fri.

Metadata standard:

Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)