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    • BOEM Offshore Marine Cadastre Data Collection

    Metadata Updated: March 11, 2026

    This is a national data collection of data resources managed by the Bureau of Ocean Energy Management (BOEM) for the Outer Continental Shelf (OCS). The data collection is designated as a National Geospatial Data Asset (NGDA) and includes: OCS BOEM Offshore Boundary Lines (Submerged Lands Act Boundary, OCSLA Limit of “8(g) Zone,” and Continental Shelf Boundary), OCS Protraction Polygons - 1st Division, OCS Gulf of Mexico NAD27 Protraction Polygons - 1st Division, OCS Block Polygons - 2nd Division, OCS Gulf of Mexico NAD27 Block Polygons - 2nd Division, and Aliquot 16ths Polygons - 3rd Division.

    All polygons are clipped to the Submerged Land Act Boundary and Continental Shelf Boundaries reflecting federal jurisdiction. The NAD27 Gulf Protractions and Blocks have a different protraction and block configuration when compared to the OCS Protraction Polygons - 1st Division and OCS Block Polygons - 2nd Division. The NAD27 Gulf data is used for Oil and Gas leasing.

    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. 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.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: us-pd

    Downloads & Resources

    Dates

    Metadata Created Date March 11, 2026
    Metadata Updated Date March 11, 2026

    Metadata Source

    Harvested from DOI BOEM DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date March 11, 2026
    Metadata Updated Date March 11, 2026
    Publisher Bureau of Ocean Energy Management
    Maintainer
    Identifier https://www.arcgis.com/home/item.html?id=52736f6cfd9841118e5f9c6410f7e844
    Data First Published 2026-03-06T21:05:58Z
    Data Last Modified 2026-03-06T21:26:14Z
    Category geospatial
    Public Access Level public
    Bureau Code 010:06
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/boem-data.json
    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 0ffb44f6-b943-400b-ba88-4a2c87a16ab0
    Harvest Source Id 1c6917da-8697-4548-9680-18518631fb48
    Harvest Source Title DOI BOEM DCAT-US
    Homepage URL https://boem-metaport-boem.hub.arcgis.com/datasets/BOEM::boem-offshore-marine-cadastre-data-collection-1
    License https://www.usa.gov/publicdomain/label/1.0/
    Metadata Type geospatial
    Old Spatial -180.0000,8.2891,180.0000,74.9964
    Program Code 010:000
    Source Datajson Identifier True
    Source Hash 37734fe629b865ccaa3ea0b9e6b10d73a860347cc90803a6f9e637df237aa1c3
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -180.0000, 8.2891, -180.0000, 74.9964, 180.0000, 74.9964, 180.0000, 8.2891, -180.0000, 8.2891}

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