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Overburden thickness of the Springfield Coal in the Illinois Basin

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 Springfield Coal 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 Central Region Energy Resources Team, 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: -90.6057

   East_Bounding_Coordinate: -86.8525

   North_Bounding_Coordinate: 41.4886

   South_Bounding_Coordinate: 37.1575

3. What does it look like?

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

   Beginning_Date: 01-Aug-1996

   Ending_Date: 01-Jul-1999

   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 (219)

   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 0.002. Longitudes are given to the nearest 0.002. Latitude and longitude values are specified in Decimal Degrees.

7. How does the data set describe geographic features?

   ibspovrdd.dbf

   Shapefile Attribute Table

   Grid_code

   numeric code for overburden categories

   Range of values
   Minimum:	-9999
   Maximum:	1000

   Legend

   english description of overburden categories

   Character Field

   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. In addition, given that these regional datasets are a compilation of data generated by each of the three states (Kentucky, Illinois, Indiana) within the Illinois basin, some discrepencies between states may exist. For instance, "Channels" have been defined and are represented in Illinois and Kentucky but have been extracted out of the coal extent in Indiana. In addition, some features 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?

3. To whom should users address questions about the data?
   Kentucky Geological Survey
   c/o William Andrews
   Geologist, Energy and Minerals Section
   228 Mining and Mineral Resources Bldg., Univ. of Kentucky
   Lexington, Kentucky 40506-0107
   USA
   

   859-257-5500 (voice)
   859-257-1147 (FAX)
   wandrews@kgs.mm.uky.edu
   

   Hours_of_Service: 8:00 AM to noon, 1:00 PM to 5:00 PM, Mon. thru Fri.

Why was the data set created?

Coal overburden maps are fundamental to coal resource analysis. Regional views assist planners and policy-makers in their tasks.

How was the data set created?

1. From what previous works were the data drawn?

   cdrom-ind-sp (source 1 of 4)

   Survey, Indiana Geological , 19990825, The Availability of the Springfield Coal member for Miningin Indiana: Indiana University, Indiana Geological Survey, Bloomington, IN.

   Online Links:

   • <http://adamite.igs.indiana.edu/index.htm>

   This is part of the following larger work.

   U.S. Geological Survey, 20000731, Availability of Coal for the Production of Coal: U.S. Geological Survey, Reston, VA.

   Online Links:

   • <http://www.usgs.gov>

   Type_of_Source_Media: CD-ROM

   Source_Contribution:

   This CD-ROM contained updated files for the Springfield coal bed in Indiana.

   USGS-CDROM (source 2 of 4)

   Type_of_Source_Media: CD-ROM

   Source_Contribution:

   provided component state-wide files used for compilation of basin-wide coverages.

   USGS-CDROM (source 3 of 4)

   U.S. Geological Survey, and Illinois State Geological Surve, Indiana Geological, 19991001, Draft copy, 1999 National Coal Resource Assessment of theSpringfield, Herrin, and Danville and Baker Coals in theIllinois Basin: Indiana Geological Survey, Bloomington, IN.

   Online Links:

   • <http://adamite.igs.indiana.edu/index.htm>

   This is part of the following larger work.

   U.S. Geological Survey, 19991001, National Coal Assessment - Illinois Basin: U.S. Geological Survey, Denver, CO.

   Online Links:

   • <http://www.usgs.gov>

   Type_of_Source_Media: CD-ROM

   Source_Contribution:

   provided component state-wide files used for compilation of basin-wide coverages.

   USGS-CDROM (source 4 of 4)

   U.S. Geological Survey, and Illinois State Geological Surve, Indiana Geological, 19991001, Draft copy, 1999 National Coal Resource Assessment of theSpringfield, Herrin, and Danville and Baker Coal Beds in theIllinois Basin: Indiana Geological Survey, Bloomington, IN.

   Online Links:

   • <http://adamite.igs.indiana.edu/index.htm>

   This is part of the following larger work.

   U.S. Geological Survey, 19991001, National Coal Assessment - Illinois Basin: U.S. Geological Survey, Denver, CO.

   Online Links:

   • <http://www.usgs.gov>

   Type_of_Source_Media: CD-ROM

   Source_Contribution:

   provided component state-wide files used for compilation of basin-wide coverages.

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

   Date: 01-Apr-2000 (process 1 of 1)

   (1) Component vector files were converted to 200-meter raster grids. (2) Grids were reclassified to consistent attribute scheme. (3) Grids were merged into one large grid, using the Arc "Merge" command. (4) Gaps along state boundaries were filled with the Arc "EuclidianAllocation" algorithm. (5) The Arc "Majority Filter" algorithm was run to remove speckles, and reduce sharp angles. (6) The final grid was converted back to vector polygon format. (7) A legend field was added to the attributes to supplement the grid codes.

   Person who carried out this activity:
   

   William Andrews
   Kentucky Geological Survey
   Geologist, Energy and Minerals Section
   228 Mining and Mineral Resources Bldg., Univ. of Kentucky
   Lexington, Kentucky 40506-0107
   USA
   

   859-257-5500 (voice)
   859-257-1147 (FAX)
   wandrews@kgs.mm.uky.edu
   

   Hours_of_Service: 8:00 AM to noon, 1:00 PM to 5:00 PM, Mon. thru Fri.

   Data sources used in this process:

   • USGS-CDROM

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?

   Polygon files from the three states were converted to raster grids with 200-meter cell sizes. The individual grids were merged, then smoothed with a majorityfilter function, then converted back to vector polygon format. The most generalized attributes from the three states were used to ensure uniformity within the regional view.

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:

Acknowledgement of the Indiana, Illinois, and Kentucky Geological Surveys would be expected in products derived from these 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: 19-Jul-2000
Last Reviewed: 28-Mar-2002

Metadata author:

Kentucky Geological Survey
c/o William Andrews
Geologist, Energy and Minerals Section
228 Mining and Mineral Resources Bldg., Univ. of Kentucky
Lexington, Kentucky 40506-0107
USA

859-257-5500 (voice)
859-257-1147 (FAX)
wandrews@kgs.mm.uky.edu

Hours_of_Service: 8:00 AM to noon, 1:00 PM to 5:00 PM, Mon. thru Fri.

Metadata standard:

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