Alaska NAD 83 Official Protraction Diagram (OPD) Outlines
type: Dataset
contact point: Organization
  fn: Bureau of Ocean Energy Management, Geospatial Services Division (Point of Contact)
keyword: submerged-lands-act-sla-boundary
keyword: amerigeo
keyword: boem
keyword: offshore
keyword: sobd
keyword: ckan
keyword: opd
keyword: beaufort-sea
keyword: ssb
keyword: state-seaward-boundary
keyword: official-protraction-diagram
keyword: supplemental-official-ocs-block-diagram
keyword: bristol-bay
keyword: federal-state-boundary
keyword: oil-and-gas
keyword: limit-of-8g-zone
keyword: outer-continental-shelf
keyword: lease-blocks
keyword: bering-sea
keyword: bering-strait
keyword: ak
keyword: national
keyword: ocs-blocks
keyword: arctic-ocean
keyword: revenue-sharing
keyword: pacific-ocean
keyword: alaska
keyword: cadastre
keyword: chukchi-sea
keyword: north-america
keyword: bureau-of-ocean-energy-management
keyword: geoss
keyword: united-states
keyword: amerigeoss
keyword: usa
keyword: ocs
keyword: gulf-of-alaska
keyword: geo
theme: {geospatial}
description: 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. 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.
issued: 2025-11-20T18:11:40.539159
modified: 2021-02-01
spatial: Location

Esri REST API Endpoint
type: Distribution
access URL: https://gis.boem.gov/arcgis/rest/services/BOEM_BSEE/AK_Layers/MapServer/4
issued: 2022-08-07T17:49:20.272595
modified: 2025-11-20T18:11:40.519875

US Migrating
type: Agent

Zip File
type: Distribution
access URL: https://www.boem.gov/AK-protrac.zip
description: AK-protrac.zip
format: ZIP
issued: 2022-08-07T17:49:20.272583
modified: 2025-11-20T18:11:40.518748

Web Resource
type: Distribution
access URL: https://www.boem.gov/Oil-and-Gas-Energy-Program/Mapping-and-Data/Alaska.aspx
description: Alaska.aspx
issued: 2022-08-07T17:49:20.272588
modified: 2025-11-20T18:11:40.519129

Shapefile
type: Distribution
access URL: https://www.boem.gov/Oil-and-Gas-Energy-Program/Mapping-and-Data/Alaska.aspx
description: CSDGM IMPORT ERROR: No digtinfo/formcont
issued: 2022-08-07T17:49:20.272577
modified: 2025-11-20T18:11:40.518340

Web Resource
type: Distribution
access URL: https://www.boem.gov/Oil-and-Gas-Energy-Program/Mapping-and-Data/Alaska.aspx
description: Alaska.aspx
issued: 2022-08-07T17:49:20.272591
modified: 2025-11-20T18:11:40.519505