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Submerged Lands Act Boundary - Gulf of Mexico NAD27

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This data set contains the Submerged Lands Act (SLA) boundary line (also known as State Seaward Boundary (SSB), or Fed State Boundary)in ESRI shapefile formats for the BOEM Gulf of Mexico Region. The SLA boundary defines the seaward limit of a state's submerged lands and the landward boundary of federally managed OCS lands. In the BOEM Gulf of Mexico Region the boundary is projected 3 nautical miles offshore from the baseline for Louisiana, Mississippi and Alabama; and 9 miles for Texas and the Gulf coast of Florida. Further information on the SLA and development of this line from baseline points can be found in OCS Report MMS 99-0006: Boundary Development on the Outer Continental Shelf (http://www.boem.gov/uploadedFiles/BOEM/Oil_and_Gas_Energy_Program/Mapping_and_Data/99-0006.pdf).
Cite this dataset when used as a source.
  • NCEI Metadata ID: gov.noaa.ncei:GulfofMexicoLimitof8_g_ZoneBoundary
gov.noaa.ncei:GulfofMexicoSubmergedLandsActBoundary
XML
Other Access
Distribution Formats
    Distributor Format not available
Distributor Bureau of Ocean Energy Management, Mapping and Boundary Branch
(703)787-1312
mapping.boundary.branch@BOEM.gov
Dataset Point of Contact Branch Chief
Bureau of Ocean Energy Management, Mapping and Boundary Branch
(703)787-1312
mapping.boundary.branch@BOEM.gov
Time Period
Spatial Reference System urn:ogc:def:crs:EPSG::4267urn:ogc:def:ellipsoid:EPSG::7008
Spatial Bounding Box Coordinates
West:-97.211212
East:-81.894485
South:25.87491
North:30.246103
Spatial Coverage Map
Associated Resources
  • Supplemental Official OCS Block Diagrams (SOBDs)
  • Official Protraction Diagrams (OPDs)
Publication Dates
  • publication: 2011-01-01
Data Presentation Form mapDigital
Dataset Progress Status Status not available
Data Update Frequency As needed
Supplemental Information
Due to slight differences in process and purpose, NOAA's 3 nautical mile line depicted on its charts may differ in some areas from the SLA boundary depicted on BOEM maps and OPDs and should not be confused with the SLA boundary. Therefore this boundary is the only boundary that should be used to depict state/federal seperation of jurisdiction for submerged lands. 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 Submerged Lands Act Boundary. The Official Protraction Diagrams (OPDs) and Supplemental Official Block Diagrams (SOBDs) serve as the legal definition for offshore boundary coordinates and area descriptions.
Purpose The Submerged Lands Act boundary line and other cadastre information the BOEM produces are generated in accordance with 30 Code of Federal Regulations (CFR) 256.8 to support Federal land ownership and mineral resource management.
Originators
  • Bureau of Ocean Energy Management, Mapping and Boundary Branch
Publishers
  • Bureau of Ocean Energy Management, Mapping and Boundary Branch
Theme keywords
  • Offshore
  • Cadastre
  • Submerged Lands Act Boundary, SLA
  • Limit of '8(g) Zone'
  • State Seaward Boundary, SSB
  • Fed State Boundary
  • Lease Blocks
  • Marine Sanctuaries
  • Outer Continental Shelf, OCS
  • OCS Blocks
  • Supplemental Official OCS Block Diagram, SOBD
  • Bureau of Ocean Energy Management BOEM
  • Official Protraction Diagram, OPD
  • Oil and Gas
  • Alternative Energy
  • Renewable Energy
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF MEXICO
  • CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > TEXAS
  • CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > LOUISIANA
  • CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALABAMA
  • CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA
  • Exclusive Economic Zone, EEZ
Use Constraints
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Access Constraints
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Other Constraints Access Constraints: None. The Block and Boundary data is in the public domain. Use Constraints: The data was developed within the U.S. Government; no proprietary rights may be attached to them nor may they be sold to the U.S. Government as part of any procurement of ADP products or services. Distribution Liability: As is. No responsibility is assumed for the correctness of this data.
Fees Fee information not available.
Acquisition Information (collection)
Last Modified: 2025-01-27T18:50:23
For questions about the information on this page, please email:mapping.boundary.branch@BOEM.gov