Total thickness contours of the North-Zone 8 coal bed (in USGS thickness intervals) in Central Texas

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: United States Geological Survey (USGS)
Publication_Date: 2011
Title:
Total thickness contours of the North-Zone 8 coal bed (in USGS thickness intervals) in Central Texas
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: AAPG Discovery Series/AAPG Studies in Geology
Issue_Identification: No. 14/No. 62
Publication_Information:
Publication_Place: Tulsa, OK
Publisher: American Association of Petroleum Geologists
Online_Linkage:
\\IGSAAAHMWSG223\D$\Data_New\GIS\AAPG\Chapter_20_GIS\Central Texas Study Area\data\cz8iso\cz8iso.shp
Larger_Work_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2011
Title:
Geologic Assessment of Coal in the Gulf of Mexico Coastal Plain, U.S.A.
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: AAPG Discovery Series/AAPG Studies in Geology
Issue_Identification: No. 14/No. 62
Publication_Information:
Publication_Place: Tulsa, OK
Publisher: American Association of Petroleum Geologists
Description:
Abstract:
This data set is a polygon coverage of the cumulative thickness of North-Zone 8, in feet, over extent of the North-Zone 8 coal and its horizon (stratigraphic equivalent) in Central Texas only. The coverage was produced by gridding more than 300 public and confidential point- source data from the National Coal Resources Data System (NCRDS) of the USGS, using EarthVision (Version 4.0.2) software, subsequently contoured into 6-inch intervals, and imported to ARC/INFO. The 'thickness' item for each polygon reflects a value in feet halfway between the bounding contour lines. This value represents results of gridding which averages point values within cells, therefore, public point data may not always match values represented in the isopach data layer.
Purpose:
This data set was used in the National Coal Resource Assessment Program in the regional evaluation of resources for the coal North-Zone 8 in the Gulf Coast region. The data set is useful for regional studies-not applicable to local scales.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1970's
Ending_Date: 1997
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -96.5074
East_Bounding_Coordinate: -96.0382
North_Bounding_Coordinate: 31.8656
South_Bounding_Coordinate: 31.2509
Keywords:
Theme:
Theme_Keyword_Thesaurus: Theme_Keyword_Thesaurus
Theme_Keyword: coal
Theme_Keyword: coal resources
Theme_Keyword: coal thickness
Theme_Keyword: lignite
Theme_Keyword: isopach
Theme_Keyword: outcrop
Theme_Keyword: USGS
Theme_Keyword: Texas Geological Survey
Theme_Keyword: Theme_Keyword
Place:
Place_Keyword_Thesaurus: Geographic Names Information System
Place_Keyword: Gulf Coast Region
Place_Keyword: Freestone County, TX
Place_Keyword: Limestone County, TX
Place_Keyword: Robertson County, TX
Place_Keyword: Leon County, TX
Place_Keyword: Milam County, TX
Place_Keyword: Lee County, TX
Place_Keyword: Bastrop County, TX
Stratum:
Stratum_Keyword_Thesaurus: Stratum_Keyword_Thesaurus
Stratum_Keyword: Wilcox Group
Stratum_Keyword: Paleocene-Eocene
Access_Constraints: none
Use_Constraints: none
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peter D. Warwick
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: MS 956 National Center
City: Reston
State_or_Province: Virginia
Postal_Code: 20192
Country: USA
Contact_Voice_Telephone: 703-648-6469
Contact_Electronic_Mail_Address: pwarwick@usgs.gov
Data_Set_Credit:
The stratigraphic data stored in the NCRDS has been submitted by State Geological Surveys and USGS scientists since its inception in the middle 1970's through state cooperative programs. The data for the North-Zone 8 coal bed was used with the permission and through the cooperation of coal geologists (primary contacts listed) at the State of Texas Bureau of Economic Geology and the State of Texas Railroad Commission
Native_Data_Set_Environment:
Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.3000
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The range of thickness values in the point-source information was 0 to 18.50 feet. The resultant range of the gridded surface was 0-20 feet; extrapolation was used over the x,y extent. The average absolute Z-error of the grid was 0.67 percent of the range.
Logical_Consistency_Report: Topologically clean
Completeness_Report:
Input points were irregularly distributed over the spatial extent of the study, therefore areas of sparse data will not reflect ground truth. North-Zone 8 cumulative coal thicknesses were selected by name from the stratigraphic data base stored in StratiFact, a relational data base manager in use by the USGS National Coal Assessment. The original data submitted to NCRDS may not have had the Zone identified, a task performed within StratiFact by examining data in cross sections. Data used were selected by geologist from the database.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: NCRDS, USGS
Publication_Date: 1995
Title: NCRDS Digital Data Set
Type_of_Source_Media: on-line data base
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1995
Ending_Date: 2000
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation:
NCRDS- National Coal Resources Data System;BEG-Bureau of Economic Geology; RRC-Railroad Commission
Source_Contribution: NCRDS- point-source data
Process_Step:
Process_Description:
North-Zone 8 data from NCRDS printed and verified against original data sources where possible. New data collected from the BEG and the RRC, and entered into NCRDS.
Process_Date: 1995-1998
Process_Step:
Process_Description:
Corrections made to NCRDS (including the new BEG and RRC data) in StratiFact.
Process_Date: 1996-1998
Process_Step:
Process_Description:
Editing and correlation of individual data bases in StratiFact to eliminate data coding differences between data sets.
Process_Date: 1998
Process_Step:
Process_Description:
Editing of thicknesses and further addition and refinement of data values to place in StratiFact data bases. The data were filtered in StratiFact and filtered in EarthVision (v.4.0.2) in geographic coordinates. The data are gridded and grid parameters used were a default 160 x 250 grid, X range -95.90438 to -96.69272, Y range 32.62942 to 33.30208, extrapolation of values over specified x,y extent plus 5%. Contour intervals at irregular intervals at 0-1.5 ft,1.5-2.5 ft, 2.5-5 ft, 5-10 ft, 10-20 ft, 20-30 ft. to follow USGS Circular 891
Process_Date: 1999
Process_Step:
Process_Description:
Grid was contoured in EarthVision into 0.5-foot intervals, using 0 to 30 feet as limits. Contour file was graphically edited in EarthVision to fit the geology of the area.
Process_Date: 1999
Process_Step:
Process_Description:
Grid was projected into Albers and regridded using the original graphically edited grid to decrease the cell size so that the small polygons in the limiting unioned coverage used for volume calculations will have a grid value to use for each small 309.09 x 303.88.
Process_Date: 1999
Process_Step:
Process_Description:
Import of contours to ARC/INFO for the entire area, using conversion ARC/INFO AML provided by Illinois State Geological Survey, and rectangular area ARC coverage (box) to enclose polygons. Polygons graphically labeled in ARC/EDIT using midpoint value for upper and lower bounding contours. The 0, 0.75, 2, 3.75, 7.5, 15, 25 (ft).
Process_Date: 1999
Process_Step:
Process_Description:
New attribute item "thickness" added and calculated from the polygon value. Added item for thickness category and populated it by graphically selecting desired polygons by thickness and calculating the category value.
Process_Date: 1999
Process_Step:
Process_Description:
Arc/Info coverages were projected to geographic coordinates, converted to shape Arc/View shape files and imported into Arc/View.
Process_Date: 1999
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
Point_and_Vector_Object_Count: 67
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000000
Longitude_Resolution: 0.000000
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 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: cz8iso.meta
Entity_Type_Definition: polygon attribute table for coverage
Entity_Type_Definition_Source: ARC/INFO
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: AREA
Attribute:
Attribute_Label: PERIMETER
Attribute:
Attribute_Label: CZ8ISO_
Attribute:
Attribute_Label: CZ8ISO_ID
Attribute:
Attribute_Label: thickness
Attribute_Definition: average thickness value of bounding contour lines
Attribute_Definition_Source: ARC/INFO
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.75
Range_Domain_Maximum: 15.00
Attribute_Units_of_Measure: feet
Attribute_Value_Accuracy_Information:
Attribute_Value_Accuracy: 0.5 - 5
Attribute_Value_Accuracy_Explanation:
plus or minus one contour interval, in feet
Attribute:
Attribute_Label: thick_is_c
Attribute_Definition: category label for coal bed thickness
Attribute_Definition_Source: ARC/INFO
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 99,100,101,102,103
Enumerated_Domain_Value_Definition:
'99' is 0 - 1.5 feet and not used in resource calculations,'100' is 1.5 - 2.5 feet,'101' is 2.5 - 5.0 feet,'102' is 5.0 - 10 feet,'103' is 10 - 20 feet
Enumerated_Domain_Value_Definition_Source: NCRDS point-source data
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: American Association of Petroleum Geologists
Contact_Address:
Address_Type: mailing address
Address: P. O. Box 979
City: Tulsa
State_or_Province: OK
Postal_Code: 74101-0979
Country: USA
Contact_Voice_Telephone: 1 800 364 2274
Contact_Facsimile_Telephone: 1 918 560 2665
Resource_Description:
Total thickness of the North-Zone 8 coal bed (in USGS thickness intervals) in Central Texas
Distribution_Liability:
The US Geological Survey provides these geographic data "as is". USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. USGS further makes no warrantees, 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 computers of the USGS, no warranty, expressed or implied, is made by 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 the delivery, installation, operation, or support by USGS.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARCE
Transfer_Size: 0.094
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <URL:<http://www.energy.er.usgs.gov>
Fees: none
Metadata_Reference_Information:
Metadata_Date: 2011
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peter D. Warwick
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: MS 956 National Center
City: Reston
State_or_Province: Virginia
Postal_Code: 20192
Country: USA
Contact_Voice_Telephone: 703-648-6469
Contact_Electronic_Mail_Address: pwarwick@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.6 on Thu Mar 01 12:09:12 2012