This dataset is a polygon shapefile representing the most recent
update of the Coal Fields of the Conterminous United States (Tully,
1996). Scale of data is 1:5,000,000. This shapefile is based on
the areas that were quantitatively assessed by the USGS as part of
the National Coal Resource Assessment (NCRA). The outlines contain
areas from which data was collected and processed in order to give an
accurate estimation of the volume of coal in specific targeted beds
and zones. The data used to create this shapefile was collected from
the 4 NCRA regional assessment files produced by the USGS and from
AAPG Discovery Series 14/Studies in Geology 62, all of which were
conducted by USGS geologists and professional staff.
Purpose:
This dataset was compiled to update the Coal Fields Map of the
Conterminous United States, OFR 96-092. This was done with new data
provided by the USGS Energy Team NCRA assessments. The shapefile
gives a visual display of the areas that were assessed by the NCRA.
Supplemental_Information:
Source used in the abstract and purpose include:
Tully, J., 1996. Coal Fields of the Conterminous United States. U.S. Geological Survey Open File Report 96-92. Scale 1:5,000,000.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2013
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -113.888687
East_Bounding_Coordinate: -77.739523
North_Bounding_Coordinate: 48.999824
South_Bounding_Coordinate: 30.017075
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: Geoscientific Information
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: coal resources
Theme_Keyword: geologic maps
Theme_Keyword: geology
Theme_Keyword: geospatial datasets
Theme:
Theme_Keyword_Thesaurus: Alexandria Digital Library Feature Type Thesaurus
Theme_Keyword: mineral resource areas
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: Coal Fields Map of North America
Theme_Keyword: Geologic Map
Theme_Keyword: Geology
Theme_Keyword: Coal
Theme_Keyword: NCRA Assessment
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: Interior Province
Place_Keyword: Northern Great Plains Province
Place_Keyword: Rocky Mountain Province
Place_Keyword: Eastern Province
Access_Constraints: None
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joseph A. East
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: physical address
Address: MS 956 National Center
Address: 12201 Sunrise Valley Drive
City: Reston
State_or_Province: VA
Postal_Code: 20192
Country: U.S.A.
Contact_Voice_Telephone: 703-648-6450
Contact_Facsimile_Telephone: 703-648-6419
Contact_Electronic_Mail_Address:jeast@usgs.gov
Data_Set_Credit:
Technical reviews for this publication were provided by Leslie Ruppert, Christopher Garrity, Susan Tewalt, Lee Osmonson, James Luppens and James Coleman.
Native_Data_Set_Environment:
Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.0.1770
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Attribute accuracy was tested by manual comparison of the NCRA Assessed Basins shapefile created for this report with the shapefile created for Provinces.
Logical_Consistency_Report:
Map elements were visually checked for overshoots, undershoots, duplicates, polygon closure and proper attribution. All polygons were created from existing shapefiles or coverages that had already gone through the USGS publications process.
Completeness_Report:
Data set complete. No data were intentionally omitted from the hard copy and digital source maps.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The shapefile is based on data taken from the 4 USGS Professional Papers 1625-A, 1625-B, 1625-C, and 1625-D, and from AAPG Discovery Series 14/Studies in Geology 62. The assessment shapefiles and coverages were merged into the primary shapefile with no change in projection or transformation of a datum, so it is assumed that they are still within the tolerances necessary for FGDC standards. The shapefiles available in U.S. Geological Survey Professional Paper 1625-C are generalized versions of the ArcINFO coverages and are not as detailed as the coverages. The coverages were used for the Appalachian data set within this primary shapefile.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Fort Union Coal Assessment Team
Publication_Date: 1999
Title:
1999 Resource Assessment of Selected Tertiary Coal Beds and Zones in the Northern Rocky Mountains and Great Plains Region.
Series_Information:
Series_Name: U.S. Geological Survey Professional Paper
Source_Citation_Abbreviation: Warwick and others (2011)
Source_Contribution: Provided assessment outlines of Gulf of Mexico Coastal Plain
Process_Step:
Process_Description:
The NCRA Assessed Basins shapefile is a merge of multiple shapefiles and coverages taken from the NCRA Assessment files. Individual assessment areas were modified to delete differing attributes. The outlines were then pasted into a primary shapefile. An attribute column for Province was added to the primary shapefile. The shapefile was then placed on top of the province polygon, and was then attributed to match the provinces. All of the shapefiles were stored in a geographic NAD1983 projection, so there was no need to reproject or do a datum transformation.
Process_Date: 20101026
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joseph A. East
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: physical address
Address: MS 956 National Center
Address: 12201 Sunrise Valley Drive
City: Reston
State_or_Province: VA
Postal_Code: 20192
Country: U.S.A.
Contact_Voice_Telephone: 703-648-6450
Contact_Facsimile_Telephone: 703-648-6419
Contact_Electronic_Mail_Address:jeast@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.001
Longitude_Resolution: 0.001
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: NCRA_Assessed Basins
Entity_Type_Definition:
Polygons defining areas that were assessed and studied as part of the NCRA Assessment
Entity_Type_Definition_Source: text
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: Province
Attribute_Definition: Province that Coal polygon falls within
Attribute_Definition_Source: Tully, J (1996)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Eastern
Enumerated_Domain_Value_Definition: Eastern Province
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: shapefile
Format_Version_Number: 1.0
Format_Information_Content: Coal field polygons with associated characteristics