OCS Gulf NAD27 Protraction Polygons - 1st Division

These data contain a Gulf OCS Region NAD27 scale spatial footprint of the outer boundaries of the Bureau of Ocean Energy Management’s (BOEM’s) Official Protraction Diagrams (OPDs) and Leasing Maps (LMs). These polygons are clipped to the Submerged Land Act Boundary and Continental Shelf Boundaries and are updated as needed. OPDs are mapping products produced and used by the BOEM to delineate areas available for potential offshore mineral leases, determine the State/Federal offshore boundaries, and determine the limits of revenue sharing and other boundaries to be considered when leasing offshore waters. The OPDs serve as the legal definition for BOEM offshore boundary coordinates and area descriptions. These data show only the outline of the maps that are available from BOEM. Only the most recently published paper or pdf versions of the OPDs should be used for official or legal purposes. Further information on the history of the development of OPDs can be found in OCS Report MMS 99-0006: Boundary Development on the Outer Continental Shelf.

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.
Organization: Department of the Interior
Organization URL: https://catalog.data.gov/organization/doi
Last updated: 2026-05-27T17:59:34.384Z
Tags: Administrative, Alaska, Atlantic, BDS, BOEM, Boundary Delineation System, Bureau of Ocean Energy Management, Cadastre Theme, Conventional Energy, Energy, Gas, Gulf, ISO 19115, Marine Minerals, OCS, OMC, OPDs Outer Continental Shelf, Official Protraction Diagrams, Offshore Marine Cadastre, Oil, Pacific, Protractions, Renewable Energy, U.S. Territories, Wind