HIFLD OPEN Outer Continental Shelf (OCS) Lease Blocks

Principal Investigator(s):  View help for Principal Investigator(s) Bureau of Ocean Energy Management (BOEM), Office of Strategic Resources (OSR), Geospatial Services Division (GSD); United States Department of Homeland Security

Version:  View help for Version V1

Name File Type Size Last Modified
metadata.xml application/xml 22.2 KB 11/21/2025 06:02:AM
outer-continental-shelf-ocs-lease-blocks-1-file_geodatabase.zip application/zip 40.7 MB 11/21/2025 06:00:AM
outer-continental-shelf-ocs-lease-blocks-1-geojson.zip application/zip 49.9 MB 11/21/2025 06:01:AM
outer-continental-shelf-ocs-lease-blocks-1-shapefile.zip application/zip 68.8 MB 11/21/2025 06:01:AM

Project Citation: 

Bureau of Ocean Energy Management (BOEM), Office of Strategic Resources (OSR), Geospatial Services Division (GSD), and United States Department of Homeland Security. HIFLD OPEN Outer Continental Shelf (OCS) Lease Blocks. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2025-11-21. https://doi.org/10.3886/E240513V1

Project Description

Project Title:  View help for Project Title HIFLD OPEN Outer Continental Shelf (OCS) Lease Blocks
Summary:  View help for Summary Outer Continental Shelf (OCS) blocks serve as the legal definition for BOEM offshore boundary coordinates used to define small geographic areas within an Official Protraction Diagram (OPD) for leasing and administrative purposes. These polygons are clipped to the Submerged Land Act Boundary and Continental Shelf Boundaries. OCS blocks relate back to individual Official Protraction Diagrams (OPDs) and are not uniquely numbered. A block is uniquely described by the Protraction Number and Block Number (e.g., NK18-02, Block 6822). A full OCS block is 4800 x 4800 meters. Smaller, clipped aliquots are found along the Federal/State OCS boundary and along UTM zone borders. Only the most recently published paper or PDF versions of the OPDs or Supplemental Official Block Diagrams (SOBDs) should be used for official or legal purposes. These data were created in the applicable NAD83 UTM or NAD27 UTM/SPCS Projection and re-projected to GCS WGS84 (EPSG 4326) for management in BOEM's enterprise GIS. However, this service in this collection has been published in WGS 1984 Web Mercator Auxiliary Sphere (EPSG 3857). Because GIS projection and topology functions can change or generalize coordinates, these data are NOT an OFFICIAL record for the exact boundaries. These data are to be used for Cartographic purposes only and should not be used to calculate area.
Original Distribution URL:  View help for Original Distribution URL https://hifld-geoplatform.hub.arcgis.com/

Scope of Project

Subject Terms:  View help for Subject Terms HIFLD Open; GIS; Official Protraction Diagram; block; offshore boundary
Geographic Coverage:  View help for Geographic Coverage United States
Time Period(s):  View help for Time Period(s) 4/28/2023 – 4/28/2023
Data Type(s):  View help for Data Type(s) geographic information system (GIS) data
Collection Notes:  View help for Collection Notes Archived from the HIFLD Open GIS data repository, which was deactivated on August 26, 2025.


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V1 [2025-11-21]

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