Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey, Central Energy Resources Team Originator: Hettinger, R.D. Originator: Roberts, L.N.R Originator: Gognat, T.A. Publication_Date: 2000 Title: ps*_fin (The final unioned polygons for the coal resource calculation in the southern Piceance Basin) Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Denver, CO USA Publisher: U.S. Geological Survey Other_Citation_Details: in subdir 500k (defines appropriate maximum scale for data use) chap. O, Investigations of the distribution and resources of coal in the southern part of the Piceance Basin, Colorado Larger_Work_Citation: Citation_Information: Originator: Kirschbaum, M.A. Originator: Roberts, L.N.R. Originator: Biewick, L.R.H. Publication_Date: 2000 Title: Geologic Assessment of Coal in the Colorado Plateau Series_Information: Series_Name: U.S. Geological Survey Professional Paper Issue_Identification: 1625-B Publication_Information: Publication_Place: Denver, CO Publisher: U.S. Geological Survey Description: Abstract: These are shapefiles and coverages of final unioned polygon coverages used to calculate coal resources of the Cameo/Fairfield coal group east of 107 deg 15' longitude, and the Cameo/Wheeler, South Canyon, and Coal Ridge coal zones west of 107 deg 15' longitude in the southern Piceance Basin, northwestern Colorado. Pscb_fin was used for the area east of 107 deg 15' longitude; pscw_fin was used for the Cameo/Wheeler coal zone; pssc_fin was used for the South Canyon coal zone; pscr_fin was used for the Coal Ridge coal zone. Polygons that make up the final unioned polygons include counties, 7.5' quadrangles, townships, surface and coal ownership, reliability, and, overburden. The final unioned coverage for each coal zone, was clipped by the resource boundary polygon of each coal zone. 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 century. This assessment is different from previous large-scale USGS assessments because files and databases are being stored in a digital format and are being analyzed using a Geographic Information System (GIS). Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19950000 Ending_Date: 19980000 Currentness_Reference: Processing Date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -108.0476 East_Bounding_Coordinate: -107.2498 North_Bounding_Coordinate: 39.7142 South_Bounding_Coordinate: 38.7488 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Colorado Plateau Theme_Keyword: coal-bearing formations Theme_Keyword: National Coal Resource Assessment (NCRA) Theme_Keyword: coal fields Theme_Keyword: coal Place: Place_Keyword_Thesaurus: None Place_Keyword: Colorado Place_Keyword: Colorado Plateau Place_Keyword: Piceance Basin Place_Keyword: Crested Butte Stratum: Stratum_Keyword_Thesaurus: Geologic Names Unit Lexicon (GNULEX) Stratum_Keyword: Mesaverde Group Stratum_Keyword: Williams Fork Formation Stratum_Keyword: Rollins Sandstone Mbr. Access_Constraints: None Use_Constraints: Appropriate maximum scale for data use is 500k. No restrictions, however, comparison with other data sets on surface and mineral ownership for the same area from other time periods might be inaccurate due to inconsistencies resulting from changes in land and mineral ownership and in mapping convention over time. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Central Energy Contact_Person: Hettinger, R.D. Contact_Address: Address_Type: mailing and physical address Address: PO Box 25046 MS 939 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303.236.7770 Security_Information: Security_Handling_Description: None Security_Classification: Unclassified Security_Classification_System: None Native_Data_Set_Environment: SunOS, 5.5.1, sun4d UNIX, ARC/INFO version 7.0.4 and ArcView 3.1 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: See Entity_Attribute_Information Logical_Consistency_Report: Polygon topology present. Completeness_Report: Complete Lineage: Process_Step: Process_Description: A boundary larger than the resource area was used to begin the unioning process. County data used in unioned polygons are described in metadata file ps_cnty.met. Township and range data are described in ps_tr.met and was unioned with the County coverage. 7.5 minute quadrangle data are described in ps_24qd.met and was unioned with the previously unioned coverage. A surface and mineral ownership coverage of the southern Piceance Basin was created by performing UNIONs and MAPJOINs on multiple coverages. Surface and mineral ownership coverages were obtained from BLM districts Glenwood Springs (GSRA), Grand Junction (GJRA), and Montrose (MRA). Specifics on the data from Glenwood Springs and Grand Junction -- Two ARC/INFO export files were received and IMPORTed into coverages. The two coverages, one for surface ownership and the other for federal minerals ownership, were UNIONed and then CLEANed. Specifics on the data from Montrose-- Separate 7.5'- scale MOSS files were received for surface ownership and mineral ownership. MOSS files were converted to ARC/INFO coverages by using the MOSSARC command. All coverages were CLEANed and two separate coverages were created for SURF and FEDMINS by performing a MAPJOIN on the indiviual 24K coverages. The resultant coverages were then UNIONed, edited for errors, and CLEANed in ARC/INFO v. 7.0.4. In places where digital files from the various BLM district offices overlapped, we honored the most current data or matched the published BLM hardcopy maps. Areas of overlap were ERASEd in Arc/Info prior to perfroming the APPEND command to combine adjacent files to form one cohesive coverage of the southern Piceance Basin depicting surface and subsurface ownership. The data were snapped to the township lines that we used for the Piceance Basin (see metadata file ps_tr.met). Data was verified by the various BLM offices in 12/98. The resultant ownership coverage was unioned with the coverage containing county, 7.5' quadrangle, and township data. A coverage was generated to show areas of coal reliability categories to define 'identified' and 'hypothetical' coal resources. The polygons were generated using the BUFFER command in ARC/INFO. Buffers were generated at a distance of three miles from data point locations of measured coal. Areas less than three miles from a data point are considered to have 'identified' resources, and areas beyond three miles are considered to have 'hypothetical' resources (Wood and others, 1983). This coverage was then unioned to the coverage containing Counties, 7.5' quadrangles, townships, and ownership. Coverages were created that contain polygons of overburden thickness on the base of Cameo/Fairfield coal group and each of its associated coal zones. To create the overburden coverage for the Cameo/Fairfield coal group, two surface grids were first generated in EarthVision (EV). One grid that represents the top of the Rollins Sandstone (SS) Mbr. is described in 'ps_strc.met' (this file was used because the top of the Rollins is equivalent to the base of the Cameo/Fairfield coal group). The other grid is a digital elevation model (DEM) of the surface topography in the study area. An EV utility was used to convert data from the DEM to a 2-dimensional grid file that represents the topography in the study area. The overburden isopach map to the base of the Cameo/Fairfield coal group was produced by subtracting the grid of the top of the Rollins SS from the grid of the surface topography and contouring the resultant grid. This overburden isopach map represents the maximum thickness of overburden to the base of the Cameo/Fairfield coal group. In areas located west of 107 deg 15' longitude, the Cameo/Fairfield coal group is divided into (in ascending order) the Cameo/Wheeler, South Canyon, and Coal Ridge coal zones. The Cameo/Wheeler lies directly on top of the Rollins Sandstone Mbr., therefore its overburden is the same as that determined for the base of Cameo/Fairfield coal group in areas west of 107 deg 15' longitude. Overburden polygons for the South Canyon and Coal Ridge coal zones were made by creating 'pseudo structure' grids of their respective bases, subtracting the 'pseudo structure' grids from the DEM grid, and contouring the resultant grids. The 'pseudo structure' grids representing the respective bases of the South Canyon and Coal Ridge coal zones were created from the detailed structure representing the top of the Rollins SS Mbr., in the following manner: 1) Datasets containing x, y, and z coordinates were extracted from the StratiFact database; x and y represent the location (latitude and longitude). For the South Canyon, z represents the thickness of the interval between its base and the top of the Rollins SS. For the Coal Ridge, z represents the thickness of the interval between its base and the base of the South Canyon coal zone. 2) The x, y, and z values were gridded, and then, using the 'Formula Processor' utility in EV, the z-grid of the South Canyon was add the to the top of Rollins SS to produce the 'pseudo structure' grid of the base of the South Canyon coal zone. Similarly, the z-grid of the Coal Ridge was added to the base of the South Canyon to produce a 'pseudo structure' grid of the base of the Coal Ridge coal zone. Overburden isopach maps were plotted in EV and the contour lines were saved in a contour output file. The contour output file was converted to a file in 'arc generate' format using ISMARC and then converted to an ARC/INFO polygon coverage using an Arc Macro Language (AML) program from the Illinois State Geological Survey. The overburden coverages were unioned with the polygon coverages containing counties, 7.5' quadrangles, township, surface and mineral ownership, and reliability. As a final step, the unioned polygon coverage was clipped with the polygon that limits the resource area of each coal zone. A detailed description of the methodology for calculating coal resources for the Colorado Plateau is contained in Roberts and others, chap. C. Process_Date: 19980000 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: 2418 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: pscr_fin.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: 0.00000 Range_Domain_Maximum: 0.00618 Attribute: Attribute_Label: Perimeter Attribute_Definition: Perimeter of polygon Attribute_Definition_Source: Software computed Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.00296 Range_Domain_Maximum: 0.84084 Attribute: Attribute_Label: Hole Attribute_Definition: Holes are polygons within the unioned polygon for which resources were not reported, either because the coal is less than resource thickness (1.2 ft) or it underlies an igneous intrusion. If 'hole' equals 'yes', then resources were not reported If 'hole 'equals 'no' or is blank, then a tonnage value for that polygon was reported. Attribute_Definition_Source: User Defined Attribute_Domain_Values: Unrepresentable_Domain: Character field Attribute: Attribute_Label: Geol Attribute_Definition: Geologic Unit Tmi - igneous intrusion Attribute_Definition_Source: User Defined Attribute_Domain_Values: Unrepresentable_Domain: Character field Attribute: Attribute_Label: Cntyname Attribute_Definition: County name Attribute_Definition_Source: User Defined Attribute_Domain_Values: Unrepresentable_Domain: Character field Attribute: Attribute_Label: Name Attribute_Definition: 7.5 minute quadrangle name Attribute_Definition_Source: User Defined Attribute_Domain_Values: Unrepresentable_Domain: Character field Attribute: Attribute_Label: Block Attribute_Definition: Township and Range block N - north S - south E - east W - west Attribute_Definition_Source: User Defined Attribute_Domain_Values: Unrepresentable_Domain: Character field Attribute: Attribute_Label: Surf Attribute_Definition: Surface ownership BLM - US Bureau of Land Management FS - US Forest Service DOE - US Department of Energy BREC - US Bureau of Reclamation SDOW - State Department of Wildlife STATE - State DISP - Disputed Attribute_Definition_Source: User Defined Attribute_Domain_Values: Unrepresentable_Domain: Character field Attribute: Attribute_Label: Fedmins Attribute_Definition: Federal mineral ownership ALL - Federal government owns all minerals COAL - Federal government owns the coal only OGC - Federal government owns the oil, gas, and coal only OG - Federal government owns oil and gas only NONE - Federal government owns none of the minerals OTHER - other Attribute_Definition_Source: User Defined Attribute_Domain_Values: Unrepresentable_Domain: Character field Attribute: Attribute_Label: Rel Attribute_Definition: Reliability categories hypo -- hypothetical iden - identified Attribute_Definition_Source: User Defined Attribute_Domain_Values: Unrepresentable_Domain: Character field Attribute: Attribute_Label: Overb Attribute_Definition: Overburden categories - range of overburden to base of coal zones. Thickness of overburden in 100s of feet. Attribute_Definition_Source: User Defined Attribute_Domain_Values: Unrepresentable_Domain: Character field Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Central Energy Contact_Address: Address_Type: mailing and physical address Address: PO Box 25046 MS 939 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303.236.4608 Resource_Description: Shapefile and ARC/INFO coverage Distribution_Liability: Any use of trade, product, or company names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made by the USGS regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Comparison with other data set on surface and mineral ownership for the same area from other time periods might be inaccurate due to inconsistencies resulting from changes in land and mineral ownership and in mapping convention over time. This data is not a legal document and is not intended to be used as such. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARC/INFO coverage, export file and shapefile Format_Version_Number: ARC/INFO 7.0.4, ArcView 2.1 Digital_Transfer_Option: Offline_Option: Offline_Media: CD-ROM Recording_Format: ISO 9660 Fees: none Technical_Prerequisites: need ARC/INFO 7.0.4 or greater and/or ArcView 2.1 or greater and/or ArcExplorer (which can be downloaded free from ) and/or other software that can read ARC/INFO coverages, ARC/INFO export files and/or shapefiles Metadata_Reference_Information: Metadata_Date: 19990203 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Central Energy Contact_Address: Address_Type: mailing and physical address Address: PO Box 25046 MS 939 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303.236.4608 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: None Metadata_Security_Information: Metadata_Security_Handling_Description: None Metadata_Security_Classification: Unclassified Metadata_Security_Classification_System: None ------------------------------------------------------------------------ Generated by mp version 2.4.8 on Wed Sep 29 10:00:30 1999