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Coal Fields of the Conterminous United States: National Coal Resource Assessment Updated Version, Coal Provinces

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?

   East, Joseph A., 2013, Coal Fields of the Conterminous United States: National Coal Resource Assessment Updated Version, Coal Provinces: U.S. Geological Survey Open-File Report 2012-1205, U.S. Geological Survey, Reston, VA.

   Online Links:

   • <http://pubs.usgs.gov/of/2012/1205/>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -124.733174

   East_Bounding_Coordinate: -66.949831

   North_Bounding_Coordinate: 49.384359

   South_Bounding_Coordinate: 24.544089

3. What does it look like?

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

   Calendar_Date: 2013

   Currentness_Reference: publication date

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

   Geospatial_Data_Presentation_Form: vector digital data

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):

      • G-polygon

   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 0.001. Longitudes are given to the nearest 0.001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257222.
      

7. How does the data set describe geographic features?

   Coal_Provinces

   Six geographic provinces of the conterminous United States divided based on regional coal location. (Source: text)

   FID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: ESRI)

   Coordinates defining the features.

   Province

   Province that coal polygon falls within (Source: Tully, J (1996))

   Value	Definition
   Eastern	Eastern Province
   Gulf Coast	Gulf Coast Province
   Interior	Interior Province
   Northern Great Plains	Northern Great Plains Province
   Pacific Coast	Pacific Coast Province
   Rocky Mountain	Rocky Mountain Province

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Joseph A. East

2. Who also contributed to the data set?

3. To whom should users address questions about the data?
   Joseph A. East
   U.S. Geological Survey
   Geologist
   MS 956 National Center
   Reston, VA 20192
   U.S.A
   

   703-648-6450 (voice)
   703-648-6419 (FAX)
   jeast@usgs.gov
   

Why was the data set created?

This dataset was compiled to update the Coal Fields Map of the Conterminous United States, OFR 96-092. The provinces did not exist in a GIS format, so a shapefile of their boundaries was created.

How was the data set created?

1. From what previous works were the data drawn?

   Trumbull, J. (1960) (source 1 of 2)

   Trumbull, J., 1960, Coal Fields of the United States (sheet 1): U.S. Geological Survey Map None.

   Type_of_Source_Media: Paper map

   Source_Scale_Denominator: 5000000

   Source_Contribution: Original Paper Map of the Coal Fields

   Tully, J. (1996) (source 2 of 2)

   Tully, J., 1996, Coal Fields of the Conterminous United States: Open File Report OFR 96-092.

   Online Links:

   • <http://pubs.usgs.gov/of/1996/of96-092/>

   Type_of_Source_Media: PDF of map, and Arc Info Coverage.

   Source_Scale_Denominator: 5000000

   Source_Contribution: Digital update of Trumbull 1960 used as base GIS for project

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

   Date: 01-Sep-2011 (process 1 of 1)

   The Coal provinces shapefile was digitized by hand from the printed PDF of OFR 96-092 (Tully, 1996). The projection of the printed map was Albers, so the digitized coverage was projected from Albers into geographic with a datum of NAD 1983. The coverage was exported as a shapefile and the polygons were populated with a Name attribute.

   Person who carried out this activity:
   

   Joseph A, East
   U.S. Geological Survey
   Geologist
   MS 956 National Center
   Reston, VA 20192
   U.S.A
   

   703-648-6450 (voice)
   703-648-6419 (FAX)
   jeast@usgs.gov
   

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?

   Attribute accuracy was tested by manual comparison of the source with georeferenced digital printouts of the original USGS OFR 96-092.

2. How accurate are the geographic locations?

   The shapefile is based on the Tully (1996) PDF.map. The shapefile was digitized by hand, with a RMS error not exceeding .005 when coordinating the digitizer. Visual comparison of the basins with the digital geologic map of North America displayed some offset, with the maximum being around 1 km.

3. How accurate are the heights or depths?

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

   Data set complete. No data was intentionally omitted from the hard copy and digital source maps.

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

   Map elements were visually checked for overshoots, undershoots, duplicates, polygon closure and proper attribution.

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: None

1. Who distributes the data set? (Distributor 1 of 1)
   USGS Information Services
   Box 25286
   Denver, CO 80225
   U.S.A.
   

   1-888-ASK-USGS (voice)
   303-202-4693 (FAX)
   <http://store.usgs.gov/>
   

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

   USGS OFR 2012-1205

3. What legal disclaimers am I supposed to read?

   This digital 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. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data published in this Open-File Report have been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS 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 USGS in the use of these data, software, or related materials. Graphical map depictions are intended to be used within the map scale limits applicable to the source data. Although software enables the user to view data at various scales, the user is cautioned to refer to the source documentation for the appropriate map scale limitations.

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

     Data format:	Coal field polygons with associated characteristics in format shapefile (version 1.0) Size: 220 megabytes
     Network links:	<http://pubs.usgs.gov/of/2012/1205/Downloads/GIS.zip>

   • Cost to order the data: None

5. What hardware or software do I need in order to use the data set?

   ArcGIS Desktop 9.X is required to open the map document

Who wrote the metadata?

Dates:

Last modified: 10-Jul-2013

Metadata author:

Joseph A. East
U.S. Geological Survey
Geologist
12201 Sunrise Valley Drive
Reston, VA 20192
U.S.A

703-648-6450 (voice)
703-648-6419 (FAX)
jeast@usgs.gov

Metadata standard:

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