Outer Continental Shelf Lease Blocks - Alaska Region NAD83

This data set contains Outer Continental Shelf block outlines in ArcGIS shapefile format for the BOEM Alaska Region. OCS blocks are used to define small geographic areas within an Official Protraction Diagram (OPD) for leasing and administrative purposes. These blocks have been clipped along the Submerged Lands Act (SLA) boundary and along the Continental Shelf Boundaries. Additional details are available from: https://www.boem.gov/BOEM-Newsroom/Library/Publications/1999/99-0006-pdf.aspx Because GIS projection and topology functions can change or generalize coordinates, and because shapefiles can not represent true arcs, these GIS files are considered to be approximate and are NOT an OFFICIAL record for the exact block coordinates or areas. The Official Protraction Diagrams (OPDs) and Supplemental Official Block Diagrams (SOBDs) serve as the legal definition for BOEM offshore boundary coordinates and area descriptions.

Data and Resources

Field Value
accessLevel public
bureauCode {010:06}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier 5c482d03-9335-45fa-9b54-3f6d6347c562
metadata_type geospatial
modified 2021-02-01
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]]]}
publisher Bureau of Ocean Energy Management
resource-type Dataset
source_datajson_identifier true
source_hash 7100c12b3d0a2f3941471e7054a4c243761913ab
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]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • ak
  • alaska
  • amerigeo
  • amerigeoss
  • arctic-ocean
  • beaufort-sea
  • bering-sea
  • bering-strait
  • boem
  • bristol-bay
  • bureau-of-ocean-energy-management
  • cadastre
  • cadastre-theme
  • chukchi-sea
  • ckan
  • cook-inlet
  • federal-state-boundary
  • geo
  • geoss
  • gulf-of-alaska
  • lease-blocks
  • limit-of-8g-zone
  • national
  • national-geospatial-data-asset
  • ngda
  • north-america
  • ocs
  • ocs-blocks
  • official-protraction-diagram
  • offshore
  • oil-and-gas
  • opd
  • outer-continental-shelf
  • pacific-ocean
  • revenue-sharing
  • sobd
  • ssb
  • state-seaward-boundary
  • submerged-lands-act-sla-boundary
  • supplemental-official-ocs-block-diagram
  • united-states
  • usa
isopen False
license_id notspecified
license_title License not specified
maintainer Bureau of Ocean Energy Management, Geospatial Services Division (Point of Contact)
maintainer_email boemosr-gsd@boem.gov
metadata_created 2025-11-21T09:56:14.633552
metadata_modified 2025-11-21T09:56:14.633556
notes This data set contains Outer Continental Shelf block outlines in ArcGIS shapefile format for the BOEM Alaska Region. OCS blocks are used to define small geographic areas within an Official Protraction Diagram (OPD) for leasing and administrative purposes. These blocks have been clipped along the Submerged Lands Act (SLA) boundary and along the Continental Shelf Boundaries. Additional details are available from: https://www.boem.gov/BOEM-Newsroom/Library/Publications/1999/99-0006-pdf.aspx Because GIS projection and topology functions can change or generalize coordinates, and because shapefiles can not represent true arcs, these GIS files are considered to be approximate and are NOT an OFFICIAL record for the exact block coordinates or areas. The Official Protraction Diagrams (OPDs) and Supplemental Official Block Diagrams (SOBDs) serve as the legal definition for BOEM offshore boundary coordinates and area descriptions.
num_resources 4
num_tags 42
title Outer Continental Shelf Lease Blocks - Alaska Region NAD83