Outer Continental Shelf Official Protraction Diagrams - Alaska Region NAD 83

Metadata Updated: May 1, 2019

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: https://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.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Date April 21, 2017
Metadata Created Date May 1, 2019
Metadata Updated Date May 1, 2019
Reference Date(s) October 24, 2008 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from DOI CKAN Harvest Source

Graphic Preview

An image of the BOEM Alaska Region, with clipped unpublished OPDs in blue and published OPDs in yellow.

Additional Metadata

Resource Type Dataset
Metadata Date April 21, 2017
Metadata Created Date May 1, 2019
Metadata Updated Date May 1, 2019
Reference Date(s) October 24, 2008 (publication)
Responsible Party Bureau of Ocean Energy Management, Mapping and Boundary Branch (Point of Contact)
Contact Email
Access Constraints 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., Access Constraints: None. The BOEM Cadastral Data is in the public domain.
Bbox East Long 180.000000
Bbox North Lat 74.996354
Bbox South Lat 46.943007
Bbox West Long -180.000000
Coupled Resource
Frequency Of Update asNeeded
Graphic Preview Description An image of the BOEM Alaska Region, with clipped unpublished OPDs in blue and published OPDs in yellow.
Graphic Preview File https://www.boem.gov/uploadedImages/BOEM/Oil_and_Gas_Energy_Program/Mapping_and_Data/Alaska/AK_PROTCLP_BG.jpg
Graphic Preview Type JPEG
Guid
Harvest Object Id 8f8565c0-85b5-4c11-b3c0-455ef6a0ce46
Harvest Source Id 34ce571b-cb98-4e0b-979f-30f9ecc452c5
Harvest Source Title DOI CKAN Harvest Source
Licence As is. No responsibility is assumed for the correctness of this data.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester true
Temporal Extent Begin 1994-01-01
Temporal Extent End 2006-01-01

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