Identification_Information:
	Citation:
		Citation_Information:
			Originator: United States Geological Survey (USGS) Central Region Energy Resources Team.
			Publication_Date: 19990930
			Title: Sccat.shp (net coal thickness in the Johnson-107 coal zone, South Carbon coalfield)n ).
			Geospatial_Data_Presentation_Form: map
			Series_Information:
				Series_Name: U. S. Geological Survey Professional Paper
				Issue_Identification: 1625-A
			Publication_Information:
				Publication_Place: Denver, CO
				Publisher: USGS Central Region Energy Resources Team
	Description:
		Abstract:
			This ArcView shapefile contains a representation of the
			Johnson-107 coal zone net coal thickness. The
			Johnson-107 coal zone is in the South Carbon coalield in
			the Carbon Basin, Wyoming.  This theme is part of the
			National Coal Resource Assessment in the Northern Rocky
			Mountains and Great Plains region, and can be viewed in
			relation to roads, geology, and other relevant themes of this
			area.
		Purpose:
			The Nation's coal resources are being assessed by the
			USGS.  This assessment identifies and characterizes
			the coal beds and coal zones that will provide the
			bulk of the Nation's coal-derived energy during the
			next few decades.  This assessment is different from
			previous USGS assessments because digital files
			and databases are being collected and stored in
			standardized 			formats, and
			being analyzed using a Geographic Information
			System (GIS).
	Time_Period_of_Content:
		Time_Period_Information:
			Single_Date/Time:
				Calendar_Date: 19980000
		Currentness_Reference: Publication Date
	Status:
		Progress: Complete
		Maintenance_and_Update_Frequency: None planned
	Spatial_Domain:
		Bounding_Coordinates:
			West_Bounding_Coordinate: -106.4340
			East_Bounding_Coordinate: -106.2951
			North_Bounding_Coordinate: 41.8319
			South_Bounding_Coordinate: 41.7232
	Keywords:
		Theme:
			Theme_Keyword_Thesaurus: None
			Theme_Keyword: National Coal Resource Assessment
			Theme_Keyword: Coal
			Theme_Keyword: Johnson-107 coal zone
			Theme_Keyword: South Carbon coalfield
			Theme_Keyword: Northern Rocky Mountain and Great Plains Coal Resources Assessment
			Theme_Keyword: Net coal thickness
			Theme_Keyword: Net coal isopach map
			Theme_Keyword: Johnson-107
		Place:
			Place_Keyword_Thesaurus: None
			Place_Keyword: Northern Rocky Mountains and Great Plains region
			Place_Keyword: Wyoming
			Place_Keyword: Carbon County
			Place_Keyword: Carbon Basin
			Place_Keyword: South Carbon coalfield
	Access_Constraints: None
	Use_Constraints: None
	Point_of_Contact:
		Contact_Information:
			Contact_Organization_Primary:
				Contact_Organization: USGS Central Region Energy Resources Team
				Contact_Person: Margaret Ellis
			Contact_Position: Geologist
			Contact_Address:
				Address_Type: mailing address
				Address:
					Box 25046
					MS 939
					Denver Federal Center
				City: Denver
				State_or_Province: CO
				Postal_Code: 80225-0046
				Country: USA
			Contact_Voice_Telephone: 303.236.7775
			Contact_Electronic_Mail_Address: mellis@usgs.gov
			Hours_of_Service: Monday through Friday, 8:00 AM- 3:00 PM
	Native_Data_Set_Environment:
		ArcView version 3.0
		ARC/INFO 7.1.2
		SUNOS, 5.6 SUN4U
		UNIX
Data_Quality_Information:
	Logical_Consistency_Report: Polygon features present
	Completeness_Report: See process steps
	Positional_Accuracy:
		Horizontal_Positional_Accuracy:
			Horizontal_Positional_Accuracy_Report:
				Limited to software coordinates precession to geographic
				coordinates.
	Lineage:
		Source_Information:
			Source_Citation:
				Citation_Information:
					Originator: USGS Energy Resources Team(comp.)
					Publication_Date: 19980000
					Publication_Time: Unknown
					Title: National Coal Resource Data System database
					Geospatial_Data_Presentation_Form: map
					Other_Citation_Details:
						U.S. Geological Survey
						National Center
						MS 956
						Reston, VA 20192
						(attn. M.D. Carter)
			Type_of_Source_Media: online
			Source_Time_Period_of_Content:
				Time_Period_Information:
					Single_Date/Time:
						Calendar_Date: Unknown
				Source_Currentness_Reference: Ground Condition
			Source_Citation_Abbreviation: NCRDS
			Source_Contribution:
				Contributed stratigraphic data  that were used to calculate
				net coal thickness at each data point location.  This net
				coal thickness was used to generate the net coal
				thickness isopach map.
		Process_Step:
			Process_Description:
				Stratigraphic data were compiled into a relational
				database.  These data were correlated and the coal beds
				in theJohnson-107 coal zone were identified. Stratigraphic
				data for the coal and rock units in the Johnson-107 coal
				zone
				were downloaded from the relational database and run
				through a custom "parting/split" program to calculate net
				coal thickness at each data location.  The data were
				loaded into an EarthVision software program and the net
				coal thickness was gridded using the isopach grid option,
				four multiple data point (number of closest control points
				used for calculating a grid value), and a grid spacing of
				300 x 300 meters.  An isopach map was generated in
				EarthVision and was studied in detail.  In areas where data
				were widely spaced and/or isopach lines were not
				reasonably accurate (based on known geologic factors)
				control points were added to the data set to better reflect
				the character of the coal thickness in those areas.  Net
				coal thickness was regridded, new isopach maps
				constructed with a constant isopach line interval of 2.5 ft,
				and isopach lines were checked a final time for accuracy.
				The isopach map was then saved to a file in ASCII format.
				The ASCII file was modified using a custom program called
				ismarc.  The newfile was imported into ARC/INFO and
				generated as a polygon coverage using an Arc Macro
				Language (aml). This aml clipped the coverage to the
				study extent and assigned the net coal thickness polygons
				with values that are the average of the values of the
				bounding isopach lines (for example, a polygon defined by
				isopach lines of 2.5 and 5 ft was assigned a net coal
				thickness attribute of 3.75 ft).  A new item was added to
				the polygon attribute table and populated with text labels
				corresponding to the coal thickness categories to be used
				for coal resource tables and graphic display (0-2.5 ft, 2.5-5
				ft, 5-10 ft, 10-20 ft,  20-30 ft, 30-40 ft, 40-50 ft, and 50-100
				ft). The coverage was then dissolved based on the text
				labels. The finalcoverage was projected to geographic
				coordinates and made into a shapefile in  ArcView.
			Process_Date: 19970000
			Process_Contact:
				Contact_Information:
					Contact_Person_Primary:
						Contact_Person: Margaret Ellis
						Contact_Organization: USGS Energy Resources Team
					Contact_Position: Geologist
					Contact_Address:
						Address_Type: mailing and physical address
						Address:
							Box 25046
							MS 939
							Denver Federal Center
						City: Denver
						State_or_Province: CO
						Postal_Code: 80225
						Country: USA
					Contact_Voice_Telephone: 303.236.7775
					Contact_Electronic_Mail_Address: mellis@usgs.gov
					Hours_of_Service: Monday through Friday, 8:00 AM- 3:00 PM
Spatial_Data_Organization_Information:
	Direct_Spatial_Reference_Method: Vector
	Point_and_Vector_Object_Information:
		SDTS_Terms_Description:
			SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
			Point_and_Vector_Object_Count: 28
Spatial_Reference_Information:
	Horizontal_Coordinate_System_Definition:
		Geographic:
			Latitude_Resolution: .0001
			Longitude_Resolution: .0001
			Geographic_Coordinate_Units: Decimal degrees
		Geodetic_Model:
			Horizontal_Datum_Name: North American Datum 1927
			Ellipsoid_Name: Clarke 1866
			Semi-major_Axis: 6378206.4
			Denominator_of_Flattening_Ratio: 294.98
Entity_and_Attribute_Information:
	Detailed_Description:
		Entity_Type:
			Entity_Type_Label: sccat.dbf
			Entity_Type_Definition: Shapefile Attribute Table
			Entity_Type_Definition_Source: None
		Attribute:
			Attribute_Label: Area
			Attribute_Definition: Area of polygon
			Attribute_Definition_Source: Software computed
			Attribute_Domain_Values:
				Range_Domain:
					Range_Domain_Minimum: 1477.051
					Range_Domain_Maximum: 35767964.000
		Attribute:
			Attribute_Label: Perimeter
			Attribute_Definition: Perimeter of polygon
			Attribute_Definition_Source: Software computed
			Attribute_Domain_Values:
				Range_Domain:
					Range_Domain_Minimum: 195.327
					Range_Domain_Maximum: 32682.852
Distribution_Information:
	Distributor:
		Contact_Information:
			Contact_Organization_Primary:
				Contact_Organization: USGS Energy Resources Team
			Contact_Address:
				Address_Type: mailing address
				Address:
					Box 25046
					MS 939
					Denver Federal Center
				City: Denver
				State_or_Province: CO
				Postal_Code: 80225-0046
				Country: USA
			Contact_Voice_Telephone: 303.236.1647
			Hours_of_Service: Monday through Friday, 8:00 AM- 3:00 PM
	Distribution_Liability:
		The US Geological Survey provides these geographic data
		"as is."  The USGS makes no guarantee or warranty
		concerning the accuracy of information contained in this
		geographic data.  The USGS further makes no warranties,
		either expressed or implied as to any other matter
		whatsoever, including, without limitation, the condition of
		the product, or its fitness for any particular purpose. The
		burden for determining fitness for use lies entirely with the
		user.  Although these data have been processed
		successfully on USGS computers, no warranty,
		expressed or implied, is made by the USGS regarding the
		use of these data on any other system, nor does the fact of
		distribution constitute or imply any such warranty. In no
		event shall the USGS have any liability whatsoever for
		payment of any consequential, incidental, indirect, special,
		or tort damages of any kind, including, but not limited to,
		any loss of profits arising out of use of or reliance on the
		geographic data or arising out of the delivery, installation,
		operation, or support by the USGS.
Metadata_Reference_Information:
	Metadata_Date: 19981216
	Metadata_Contact:
		Contact_Information:
			Contact_Organization_Primary:
				Contact_Organization: USGS Energy Resources Team
				Contact_Person: Margaret Ellis
			Contact_Position: Geologist
			Contact_Address:
				Address_Type: mailing address
				Address:
					Box 25046
					MS 939
					Denver Federal Center
				City: Denver
				State_or_Province: CO
				Postal_Code: 80225-0046
				Country: USA
			Contact_Voice_Telephone: 303.236.7775
			Contact_Electronic_Mail_Address: mellis@usgs.gov
			Hours_of_Service: Monday through Friday, 8:00 AM- 3:00 PM
	Metadata_Standard_Name: FGDC CSDGM
	Metadata_Standard_Version: 19940608