Identification_Information:
  Citation:
    Citation_Information:
      Originator: David Twichell
      Publication_Date: 2005
      Title: SIS1000_COVERAGE.SHP - outline extent of the SIS-1000 1999 USGS sidescan sonar data coverage of an area of the Upper Continental Slope offshore of Louisiana
      Edition: 1.0
      Geospatial_Data_Presentation_Form: vector digital data
      Series_Information:
        Series_Name: Open-File Report
        Issue_Identification: 2005-1071
      Publication_Information:
        Publication_Place: Woods Hole Science Center, Woods Hole, MA
        Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
      Online_Linkage: http://pubs.usgs.gov/of/2005/1071/data/sidescan/nterpretation/sis1000/sis1000_coverage.shp
      Larger_Work_Citation:
        Citation_Information:
          Originator: Twichell, D.C.
          Originator: Cross, V.A.
          Originator: Paskevich, V.F.
          Originator: Hutchinson, D.R.
          Originator: Winters, W.J.
          Originator: Hart, P.E.
          Publication_Date: 2005
          Title: GIS of selected geophysical and core data in the northern Gulf of Mexico continental slope collected by the U.S. Geological Survey
          Edition: 1.0
          Series_Information:
            Series_Name: Open-File Report
            Issue_Identification: 2005-1071
          Publication_Information:
            Publication_Place: Woods Hole Science Center, Woods Hole, MA
            Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
          Other_Citation_Details: 1 DVD-ROM
          Online_Linkage: http://pubs.usgs.gov/of/2005/1071
  Description:
    Abstract: Since 1982 the U.S. Geological Survey (USGS) has collected a large amount of surficial and shallow subsurface geologic information in the deep parts of the Gulf of Mexico.  These data include digital sidescan sonar imagery, digital seismic-reflection data, and descriptions and analyses of piston and gravity cores.  The data were collected during several different projects that addressed surficial and shallow subsurface geologic processes.  Some of these data sets have already been published, but the growing interest in the occurrence and distribution of gas hydrates in the Gulf of Mexico warrants integrating these existing data and associated interpretations into a GIS to provide regional background information for ongoing and future gas hydrate research.
    Purpose: This GIS data layer outlines the extent of the sidescan sonar image that was collected by the Benthos SIS-1000 system in 1999 on the upper continental slope offshore of Louisiana.
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 19990410
        Ending_Date: 19990414
    Currentness_Reference: ground condition
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -91.868088
      East_Bounding_Coordinate: -91.582252
      North_Bounding_Coordinate: 27.824676
      South_Bounding_Coordinate: 27.702563
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: General
      Theme_Keyword: U.S. Geological Survey
      Theme_Keyword: USGS
      Theme_Keyword: Coastal and Marine Geology Program
      Theme_Keyword: CMGP
      Theme_Keyword: Woods Hole Science Center
      Theme_Keyword: WHSC
      Theme_Keyword: Gulf of Mexico GIS database
      Theme_Keyword: polygon
      Theme_Keyword: ArcView
      Theme_Keyword: shapefile
      Theme_Keyword: Information Archives Field Activity 99002
      Theme_Keyword: U.S. Exclusive Economic Zone
      Theme_Keyword: EEZ
      Theme_Keyword: data coverage
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: oceans and estuaries
      Theme_Keyword: geoscientificInformation
    Place:
      Place_Keyword_Thesaurus: General
      Place_Keyword: Gulf of Mexico
      Place_Keyword: Louisiana continental slope
      Place_Keyword: North America
      Place_Keyword: United States
  Access_Constraints: None
  Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution.  Please recognize the U.S. Geological Survey (USGS) as the source of this information.
  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: David Twichell
        Contact_Organization: U.S. Geological Survey
      Contact_Position: Oceanographer
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 384 Woods Hole Road
        City: Woods Hole
        State_or_Province: MA
        Postal_Code: 02543-1598
        Country: USA
      Contact_Voice_Telephone: (508) 548-8700 x2266
      Contact_Facsimile_Telephone: (508) 457-2310
      Contact_Electronic_Mail_Address: dtwichell@usgs.gov
  Browse_Graphic:
    Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2005/1071/data/sidescan/interpretation/sis1000/sis1000_coverage-thumb.gif
    Browse_Graphic_File_Description: Thumbnail image showing the extent of the sidescan sonar coverage.
    Browse_Graphic_File_Type: GIF
  Browse_Graphic:
    Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2005/1071/data/sidescan/interpretation/sis1000/sis1000_coverage.gif
    Browse_Graphic_File_Description: Overview image showing the extent of the sidescan sonar coverage.
    Browse_Graphic_File_Type: GIF
  Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535
Data_Quality_Information:
  Lineage:
    Process_Step:
      Process_Description: The SIS-1000 sidescan sonar mosaic was registered in ArcView and then a polygon was created  that outlines the extent of the sidescan sonar coverage.
      Source_Used_Citation_Abbreviation: sis_engeog.tif
      Source_Produced_Citation_Abbreviation: sis1000_coverage.shp
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: David Twichell
            Contact_Organization: Oceanographer
          Contact_Position: U.S. Geological Survey
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 384 Woods Hole Road
            City: Woods Hole
            State_or_Province: MA
            Postal_Code: 02543-1598
            Country: USA
          Contact_Voice_Telephone: (508) 548-8700 x2266
          Contact_Facsimile_Telephone: (508) 457-2310
          Contact_Electronic_Mail_Address: dtwichell@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
      Point_and_Vector_Object_Count: 1
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 1983
      Ellipsoid_Name: Geodetic Reference System 80
      Semi-major_Axis: 6378137.000000
      Denominator_of_Flattening_Ratio: 298.257224
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: sis1000_coverage
      Entity_Type_Definition: Shapefile attribute table
      Entity_Type_Definition_Source: ESRI
    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: ID
      Attribute_Definition: Internal feature number.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 0
    Attribute:
      Attribute_Label: AREA
      Attribute_Definition: Area of polygon
      Attribute_Definition_Source: Software computed
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 329202832.813
          Range_Domain_Maximum: 329202832.813
          Attribute_Units_of_Measure: square meters
          Attribute_Measurement_Resolution: .001
    Attribute:
      Attribute_Label: PERIMETER
      Attribute_Definition: Perimeter of polygon
      Attribute_Definition_Source: Software computed
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 128816.124
          Range_Domain_Maximum: 128816.124
          Attribute_Units_of_Measure: meters
          Attribute_Measurement_Resolution: .001
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: David Twichell
        Contact_Organization: U.S. Geological Survey
      Contact_Position: Oceanographer
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 384 Woods Hole Road
        City: Woods Hole
        State_or_Province: MA
        Postal_Code: 02543-1598
        Country: USA
      Contact_Voice_Telephone: (508) 548-8700 x2266
      Contact_Facsimile_Telephone: (508) 457-2310
      Contact_Electronic_Mail_Address: dtwichell@usgs.gov
  Resource_Description: Downloadable data.
  Distribution_Liability:
    Although this data set has 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/or related materials.  The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.

    Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: SHP
        Format_Version_Number: 3.3
        Format_Specification: ESRI polygon shapefile
        Format_Information_Content: The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The DBF file contains the attribute data in dBase format. The PRJ file contains the coordinate system information (optional). The AVL file contains the legend information (optional). The SBN and SBX files contain the spatial index of the geospatial data (optional). The XML file contains the metadata describing the data set <data set name>.shp.xml.  An ASCII version of the metadata file.  A browse graphic showing the data layer coverage and extent (optional).
        File_Decompression_Technique: zip archive
        Transfer_Size: 0.004
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://pubs.usgs.gov/of/2005/1071/data/sidescan/interpretation/sis-1000/sis1000_coverage.zip
          Access_Instructions: Data may be retrieved via any WWW browser.
        Offline_Option:
          Offline_Media: DVD-ROM
          Recording_Capacity:
            Recording_Density: 4.75
            Recording_Density_Units: Gbytes
          Recording_Format: UDF
    Fees: None
  Technical_Prerequisites: The data are available in Environmental Systems Research Institute (ESRI) shapefile format.  The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file.  In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data.  A free data viewer, arcexplorer, capable of displaying the data is available from ESRI at www.esri.com.
Metadata_Reference_Information:
  Metadata_Date: 20051219
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
        Contact_Person: David Twichell
      Contact_Position: Oceanographer
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 384 Woods Hole Road
        City: Woods Hole
        State_or_Province: MA
        Postal_Code: 02543-1598
        Country: USA
      Contact_Voice_Telephone: (508) 548-8700 x2266
      Contact_Facsimile_Telephone: (508) 457-2310
      Contact_Electronic_Mail_Address: dtwichell@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_Access_Constraints: None
  Metadata_Use_Constraints: None
  Metadata_Extensions:
    Online_Linkage: http://www.esri.com/metadata/esriprof80.html
    Profile_Name: ESRI Metadata Profile
