# Alaska NAD 83 Official Protraction Diagram (OPD) Outlines (clipped)

## Metadata:

- Identification_Information
- Data_Quality_Information
- Spatial_Data_Organization_Information
- Spatial_Reference_Information
- Entity_and_Attribute_Information
- Distribution_Information
- Metadata_Reference_Information

Identification_Information:
  Citation:
    Citation_Information:
      Originator: Bureau of Ocean Energy Management, Mapping and Boundary Branch
      Publication_Date: 20081024
      Title:
        Alaska NAD 83 Official Protraction Diagram (OPD) Outlines (clipped)
      Geospatial_Data_Presentation_Form: vector digital data
      Series_Information:
        Series_Name: Digital Offshore Cadastre
        Issue_Identification: current
      Publication_Information:
        Publication_Place: Herndon, Virginia
        Publisher: Bureau of Ocean Energy Management, Mapping and Boundary Branch
      Online_Linkage: http://www.boem.gov/Oil-and-Gas-Energy-Program/Mapping-and-Data/Alaska/protclip.aspx
      Online_Linkage: http://www.boem.gov/Oil-and-Gas-Energy-Program/Mapping-and-Data/Alaska.aspx
      Larger_Work_Citation:
        Citation_Information:
          Originator: Bureau of Ocean Energy Management, Mapping and Boundary Branch
          Publication_Date: 20081024
          Title:
            BOEM Offshore Cadastral Data
          Geospatial_Data_Presentation_Form: map
          Publication_Information:
            Publication_Place: Herndon, Virginia
            Publisher: Bureau of Ocean Energy Management, Mapping and Boundary Branch
  Description:
    Abstract:

        This data set contains Official Protraction Diagram (OPD) outlines in ESRI shapefile format. At lower latitudes (0-48 degrees) OPDs are 1 degree in latitude by 2 degrees in longitude. At higher latitudes (48-75 degrees) OPDs are 3 degrees wide. OPDs are further subdivided into blocks that are 4800 x 4800 meters on a UTM grid but this file does not include those blocks - only the OPD outline). Where the OPD hits the UTM zone boundary, that zone boundary will be a geodesic line - which will appear slightly curved on the UTM grid. OPDs are numbered using the United Nations International Map of the World Numbering System, and are generally named for land or hydrographic features contained within the limits of the diagram. These OPD outlines were clipped along the Submerged Lands Act (SLA) boundary (3 nautical mile line) and Continental Shelf Boundary (maritime boundaries and limits), Further information on the historic development of OPD's can be found in OCS Report MMS 99-0006: Boundary Development on the Outer Continental Shelf: http://www.boem.gov/BOEM-Newsroom/Library/Publications/1999/99-0006-pdf.aspx Because GIS projection and topology functions can change or generalize coordinates, these GIS files are considered to be approximate and are NOT an OFFICIAL record for the exact OPD coordinates or areas. The Official Protraction Diagrams (OPDs) and Supplemental Official OCS Block Diagrams (SOBDs), available on the web in pdf format, serve as the legal definition for BOEM offshore boundary coordinates and area descriptions.

    Purpose:

        These block polygons and other cadastre information the BOEM produces are generated in accordance with 30 Code of Federal Regulations (CFR) 256.8 to support Federal land ownership and mineral resource management.

    Supplemental_Information:

        The BOEM is making its existing cadastre data available at http://www.boem.gov/Oil-and-Gas-Energy-Program/Mapping-and-Data/Index.aspx. These data include Official Protraction Diagrams (OPDs), and Supplemental Official OCS Block Diagrams (SOBDs) in pdf format, and digital spatial data in ArcGIS shapefile format.

  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground.
      Range_of_Dates/Times:
        Beginning_Date: 1994
        Ending_Date: 2006
    Currentness_Reference:

        publication date

  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -180.000000
      East_Bounding_Coordinate: 180.000000
      North_Bounding_Coordinate: 74.996354
      South_Bounding_Coordinate: 46.943007
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: Cadastre
      Theme_Keyword: Oil and gas
      Theme_Keyword: Offshore
      Theme_Keyword: Supplemental Official OCS Block Diagram, SOBD
      Theme_Keyword: Submerged Lands Act (SLA) Boundary
      Theme_Keyword: Limit of "8(g) Zone"
      Theme_Keyword: Outer Continental Shelf, OCS
      Theme_Keyword: Lease blocks
      Theme_Keyword: Revenue Sharing
      Theme_Keyword: OCS blocks
      Theme_Keyword: Bureau of Ocean Energy Management, BOEM
      Theme_Keyword: State Seaward Boundary, SSB
      Theme_Keyword: Official Protraction Diagram, OPD
      Theme_Keyword: Federal State Boundary
    Place:
      Place_Keyword_Thesaurus: None
      Place_Keyword: Alaska, AK
      Place_Keyword: USA
      Place_Keyword: Pacific Ocean
      Place_Keyword: Beaufort Sea
      Place_Keyword: Chukchi Sea
      Place_Keyword: Arctic Ocean
      Place_Keyword: Bering Strait
      Place_Keyword: Bering Sea
      Place_Keyword: Bristol Bay
      Place_Keyword: Gulf of Alaska
  Access_Constraints: None. The BOEM Cadastral Data is in the public domain.
  Use_Constraints:

      The data was developed within the U.S. Government; no proprietary rights may be attached to them nor may they be sold to the U.S. Government as part of any procurement of digtial data products and services.

  Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Bureau of Ocean Energy Management, Mapping and Boundary Branch
      Contact_Position: Branch Chief
      Contact_Address:
        Address_Type: mailing and physical address
        Address:

            381 Elden St.

        Address:

            Mail Stop  HM3120

        City: Herndon
        State_or_Province: Virginia
        Postal_Code: 20170
        Country: USA
      Contact_Voice_Telephone: (703) 787-1312
      Contact_Facsimile_Telephone: (703) 787-1236
      Contact_Electronic_Mail_Address: mapping.boundary.branch@boem.gov
      Hours_of_Service: 9:00am-4:00pm ET
  Browse_Graphic:
    Browse_Graphic_File_Name: http://www.boem.gov/uploadedImages/BOEM/Oil_and_Gas_Energy_Program/Mapping_and_Data/Alaska/AK_PROTCLP_BG.jpg
    Browse_Graphic_File_Description:
      An image of the BOEM Alaska Region, with clipped unpublished OPDs in blue and published OPDs in yellow.
    Browse_Graphic_File_Type: JPEG
  Native_Data_Set_Environment:
    Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.5.4400
  Cross_Reference:
    Citation_Information:
      Originator: Bureau of Ocean Energy Management, Mapping and Boundary Branch
      Publication_Date: 1994-2008
      Title:
        Official Protraction Diagrams (OPDs)
      Edition: current
      Geospatial_Data_Presentation_Form: diagram
      Publication_Information:
        Publication_Place: Herndon, Virginia
        Publisher: Bureau of Ocean Energy Management, Mapping and Boundary Branch
      Other_Citation_Details:
        At lower latitudes (0-48 degrees) OPDs are 1 degree in latitude by 2 degrees in longitude. At higher latitudes (48-75 degrees) OPDs are 3 degrees wide.
      Online_Linkage: http://www.boem.gov/Oil-and-Gas-Energy-Program/Mapping-and-Data/Alaska.aspx
      Larger_Work_Citation:
        Citation_Information:
          Originator: Bureau of Ocean Energy Management, Mapping and Boundary Branch
          Publication_Date: 1994-2008
          Title:
            BOEM Offshore Cadastral Data
  Cross_Reference:
    Citation_Information:
      Originator: Bureau of Ocean Energy Management, Mapping and Boundary Branch
      Publication_Date: 1994-2008
      Title:
        Supplemental Official OCS Block Diagrams (SOBDs)
      Edition: current
      Geospatial_Data_Presentation_Form: diagram
      Publication_Information:
        Publication_Place: Herndon, Virginia
        Publisher: Bureau of Ocean Energy Management, Mapping and Boundary Branch
      Other_Citation_Details:
        SOBDs contain official coordinate and area descriptions for individual blocks.
      Larger_Work_Citation:
        Citation_Information:
          Originator: Bureau of Ocean Energy Management, Mapping and Boundary Branch
          Publication_Date: 1994-2008
          Title:
            BOEM Offshore Cadastral Data

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Data_Quality_Information:
  Logical_Consistency_Report:

      The file is believed to be free of topologic errors.

  Completeness_Report:

      The entire Alaska Region consists of 285 NAD 83 Official Protraction Diagrams (OPDs), yet not all have been published in the federal register.   A total of 69 OPDs remain to be published.  The browse graphic distinguishes the difference between the published OPDs and the unpublished OPDs.  Another way to tell if an OPD is published or unpublished is by looking at the PROT_APRV_ field in the attribute table.  If the PROT_APRV_ field is blank, then the OPD is considered unpublished.  The completion date of the entire Alaska Region OPDs is unknown at this time.

  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report:

          Coordinates values have been computed to .00000001 of a degree, but this shapefile is considered approximate. Where differences occur between the shapefile and the OPD and SOBD diagrams, the diagrams take precedence.

  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Bureau of Ocean Energy Management
          Publication_Date: 20081024
          Title:
            BOEM/BSEE/ONRR Technical Information Management System (TIMS)
          Geospatial_Data_Presentation_Form: database
          Publication_Information:
            Publication_Place: Herndon, Virginia
            Publisher: Bureau of Ocean Energy Management
      Type_of_Source_Media: digital tape media
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 1994
            Ending_Date: 2006
        Source_Currentness_Reference:
          publication date
      Source_Citation_Abbreviation:
        TIMS
      Source_Contribution:

          Coordinates and attributes for OPD polygons.

    Process_Step:
      Process_Description:

          In house programs were used to protract offshore blocks OPD by OPD, on a UTM grid for the offshore areas.  Additional boundaries, including the Submerged Lands Act boundary, the Continental Shelf boundary, and others were also computed and intersected with the OPD blocks. The resulting points were then stored in the TIMS database. Other in-house programs were used to create an ArcInfo Coverage from the data stored in the TIMS database. That coverage was converted into a shapefile using ArcGIS. Portions of blocks outside federal jurisdiction were removed, and the shapefile was further “dissolved” to yield just the clipped OPD outlines.

      Source_Used_Citation_Abbreviation:
        TIMS
      Process_Date: 2006
      Process_Contact:
        Contact_Information:
          Contact_Organization_Primary:
            Contact_Organization: Bureau of Ocean Energy Management, Mapping and Boundary Branch
          Contact_Position: Branch Chief
          Contact_Address:
            Address_Type: mailing and physical address
            Address:

                381 Elden St.

            Address:

                Mail Stop  HM3120

            City: Herndon
            State_or_Province: Virginia
            Postal_Code: 20170
            Country: USA
          Contact_Voice_Telephone: (703) 787-1312
          Contact_Facsimile_Telephone: (703) 787-1236
          Contact_Electronic_Mail_Address: mapping.boundary.branch@boem.gov
          Hours_of_Service: 9:00am-4:00pm ET
    Process_Step:
      Process_Description:

          Dataset copied.

      Source_Used_Citation_Abbreviation:
        W:\archera\Webpage\Alaska\Revisedshapefiles\AK_PROTCLP

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Spatial_Data_Organization_Information:
  Indirect_Spatial_Reference_Method:
    U.S. Alaska Outer Continental Shelf (OCS)
  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: 284

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Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.0000001
      Longitude_Resolution: 0.0000001
      Geographic_Coordinate_Units: Decimal Degrees
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: Geodetic Reference System 1980
      Semi-major_Axis: 6378137.0
      Denominator_of_Flattening_Ratio: 298.257222101

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Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: AK_PROTCLP
    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: OBJECTID
      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: PROT_NUMBE
      Attribute_Definition:

          Protraction Number is the identifier of an Official Protraction Diagram

      Attribute_Definition_Source:

          Bureau of Ocean Energy Management

    Attribute:
      Attribute_Label: PROT_APRV_
      Attribute_Definition:

          Protraction Approval Date is the day, month and year the Official Protraction Diagram is signed by the Federal Government and approved for distribution.

      Attribute_Definition_Source:

          Bureau of Ocean Energy Management

    Attribute:
      Attribute_Label: MMS_REGION
      Attribute_Definition:

          Region Code is the identifier used to identify the BOEM Outer Continental Shelf (OCS) Region.

      Attribute_Definition_Source:

          Bureau of Ocean Energy Management

    Attribute:
      Attribute_Label: Shape_Leng
      Attribute_Definition:

          Perimeter is computed by ESRI in coverage units (degrees) - NOT the official BOEM TIMS measurement.

      Attribute_Definition_Source:

          ESRI

    Attribute:
      Attribute_Label: Shape_Area
      Attribute_Definition:

          Area is computed by ESRI in coverage units (square degrees) - NOT the official BOEM TIMS acreage.

      Attribute_Definition_Source:

          ESRI

      Attribute_Domain_Values:
        Unrepresentable_Domain:
          Positive real numbers that are automatically generated.
    Attribute:
      Attribute_Label: PROT_NAME
      Attribute_Definition:

          Official Protraction Diagram Name is the name as it appears on the actual document.

      Attribute_Definition_Source:

          Bureau of Ocean Energy Management

    Attribute:
      Attribute_Label: PROJ_ZONE_
      Attribute_Definition:

          OPD Map Projection Zone Code are an indicator of the map projection and UTM zone for map computation and plotting purposes.

      Attribute_Definition_Source:

          Bureau of Ocean Energy Management

    Attribute:
      Attribute_Label: DATUM_CODE
      Attribute_Definition:

          Datum Code is the indicator used to identify the reference horizontal datum.  Data value 1 is North American Datum of 1983/World Geodetic System of 1984 (NAD 83 / WGS 84).

      Attribute_Definition_Source:

          Bureau of Ocean Energy Management

    Attribute:
      Attribute_Label: PLAN_CODE
      Attribute_Definition:

          Planning Area Code is the code used to designate an OCS planning area.

      Attribute_Definition_Source:

          Bureau of Ocean Energy Management

    Attribute:
      Attribute_Label: PLAN_NAME
      Attribute_Definition:

          Planning Area Name is the name assigned to BOEM Outer Continental Shelf planning area.

      Attribute_Definition_Source:

          Bureau of Ocean Energy Management

  Overview_Description:
    Entity_and_Attribute_Overview:

        Atttributes to describe the OPDs, primarily the Protraction number and approval date.

    Entity_and_Attribute_Detail_Citation:

        Bureau of Ocean Energy Management

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Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Bureau of Ocean Energy Management, Mapping and Boundary Branch
      Contact_Position: Branch Chief
      Contact_Address:
        Address_Type: mailing and physical address
        Address:

            381 Elden St.

        Address:

            Mail Stop  HM3120

        City: Herndon
        State_or_Province: Virginia
        Postal_Code: 20170
        Country: USA
      Contact_Voice_Telephone: (703) 787-1312
      Contact_Facsimile_Telephone: (703) 787-1236
      Contact_Electronic_Mail_Address: mapping.boundary.branch@boem.gov
      Hours_of_Service: 9:00am-4:00pm ET
  Resource_Description: Digital Offshore Cadastre
  Distribution_Liability:

      As is. No responsibility is assumed for the correctness of this data.

  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: Shapefile
        Format_Version_Number: 10.0
        Transfer_Size: 7.063
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://www.boem.gov/Oil-and-Gas-Energy-Program/Mapping-and-Data/Alaska.aspx
          Access_Instructions:
            From the GIS Files section of the webpage, click on the shapefile you wish to download. The downloaded file will need to be unzipped.
          Online_Computer_and_Operating_System:
            Windows

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Metadata_Reference_Information:
  Metadata_Date: 20121220
  Metadata_Review_Date: 20121220
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Bureau of Ocean Energy Management, Mapping and Boundary Branch
        Contact_Person: REQUIRED: The person responsible for the metadata information.
      Contact_Position: Branch Chief
      Contact_Address:
        Address_Type: mailing and physical address
        Address:

            381 Elden St.

        Address:

            Mail Stop  HM3120

        City: Herndon
        State_or_Province: Virginia
        Postal_Code: 20170
        Country: USA
      Contact_Voice_Telephone: (703) 787-1312
      Contact_Facsimile_Telephone: (703) 787-1236
      Contact_Electronic_Mail_Address: mapping.boundary.branch@boem.gov
      Hours_of_Service: 9:00am-4:00pm ET
  Metadata_Standard_Name: FGDC Content Standard 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
  Metadata_Extensions:
    Online_Linkage: http://www.esri.com/metadata/esriprof80.html
    Profile_Name: ESRI Metadata Profile

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