Outer Continental Shelf Official Protraction Diagrams - Alaska Region NAD 83

Metadata Updated: May 12, 2022

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

Public: This dataset is intended for public access and use. 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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Metadata Created Date November 5, 2021
Metadata Updated Date May 12, 2022

Metadata Source

Harvested from DOI DCAT-US harvest source

Additional Metadata

Resource Type Dataset
Metadata Created Date November 5, 2021
Metadata Updated Date May 12, 2022
Publisher Bureau of Ocean Energy Management
Unique Identifier Unknown
Identifier c6472cc5-8341-4624-8a00-9df6fbf2595f
Data Last Modified 2021-02-01
Category geospatial
Public Access Level public
Bureau Code 010:06
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 1251d393-b265-465f-9734-eac75b19bde6
Harvest Source Id bee011ae-6f4a-4b9b-bef9-6c8b6453c562
Harvest Source Title DOI DCAT-US harvest source
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": -180.0, 46.943007, 180.0, 46.943007, 180.0, 74.996354, -180.0, 74.996354, -180.0, 46.943007}
Source Datajson Identifier True
Source Hash f475cccd6e4821dee3a552a30e2fbd22e07a1469
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -180.0, 46.943007, 180.0, 46.943007, 180.0, 74.996354, -180.0, 74.996354, -180.0, 46.943007}

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