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OCS BOEM Offshore Boundary Lines

Published by Bureau of Ocean Energy Management | Department of the Interior | Catalog Last Checked: May 26, 2026 at 03:38 PM | Dataset Last Updated: March 31, 2026 at 12:00 AM
These data contain a national scale Submerged Lands Act (SLA) boundary line, Limit of "8(g) Zone," line and Continental Shelf Boundary. The SLA boundary defines the seaward limit of a state's submerged lands and the landward boundary of federally managed OCS lands. The Outer Continental Shelf Lands Act "8(g) Zone" lies between the Submerged Lands Act (SLA) boundary line and a line projected 3 nautical miles seaward of the SLA boundary line. Within this zone, oil and gas revenues are shared with the coastal state(s). The Continental Shelf Boundary defines the seaward limit of federally managed OCS lands. The line depicts the limit of U.S. jurisdiction for offshore mineral development.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.

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Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
[
  "010:06"
]
contactPoint 
{
  "fn": "BOEM_GeoSEAS",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:geoseas@boem.gov"
}
description <div style='text-align:Left;'><div><div><p><span>These data contain a national scale Submerged Lands Act (SLA) boundary line, Limit of "8(g) Zone," line and Continental Shelf Boundary. The SLA boundary defines the seaward limit of a state's submerged lands and the landward boundary of federally managed OCS lands. The Outer Continental Shelf Lands Act "8(g) Zone" lies between the Submerged Lands Act (SLA) boundary line and a line projected 3 nautical miles seaward of the SLA boundary line. Within this zone, oil and gas revenues are shared with the coastal state(s). The Continental Shelf Boundary defines the seaward limit of federally managed OCS lands. The line depicts the limit of U.S. jurisdiction for offshore mineral development.</span></p><p><span>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, </span><span style='font-weight:bold;'>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.</span></p></div></div></div>
distribution 
[
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    "title": "CSV",
    "format": "CSV",
    "accessURL": "https://boem-metaport-boem.hub.arcgis.com/api/download/v1/items/746def551ad6457ca98a33184d3cf9e1/csv?layers=8",
    "mediaType": "text/csv"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Excel",
    "format": "XLSX",
    "accessURL": "https://boem-metaport-boem.hub.arcgis.com/api/download/v1/items/746def551ad6457ca98a33184d3cf9e1/excel?layers=8",
    "mediaType": "application/vnd.ms-excel"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Feature Collection",
    "format": "TXT",
    "accessURL": "https://boem-metaport-boem.hub.arcgis.com/api/download/v1/items/746def551ad6457ca98a33184d3cf9e1/featureCollection?layers=8",
    "mediaType": "text/plain"
  },
  {
    "@type": "dcat:Distribution",
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    "format": "ZIP",
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    "mediaType": "application/zip"
  },
  {
    "@type": "dcat:Distribution",
    "title": "GeoPackage",
    "format": "GPKG",
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    "mediaType": "application/geopackage+sqlite3"
  },
  {
    "@type": "dcat:Distribution",
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    "format": "GeoJSON",
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    "mediaType": "application/vnd.geo+json"
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    "mediaType": "application/vnd.google-earth.kml+xml"
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    "mediaType": "application/geopackage+sqlite3"
  },
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    "accessURL": "https://boem-metaport-boem.hub.arcgis.com/datasets/BOEM::ocs-boem-offshore-boundary-lines-1",
    "mediaType": "text/html"
  },
  {
    "@type": "dcat:Distribution",
    "title": "ISO-19139 metadata",
    "accessURL": "https://boem.maps.arcgis.com/sharing/rest/content/items/746def551ad6457ca98a33184d3cf9e1/info/metadata/metadata.xml?format=iso19139",
    "mediaType": "text/xml",
    "description": "A copy of the full metadata describing the data."
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    "accessURL": "https://services7.arcgis.com/G5Ma95RzqJRPKsWL/arcgis/rest/services/OCS_BOEM_Offshore_Boundary_Lines/FeatureServer/8",
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identifier https://www.arcgis.com/home/item.html?id=746def551ad6457ca98a33184d3cf9e1&sublayer=8
issued 2026-05-21T12:52:27Z
keyword 
[
  "Administrative",
  "Alaska",
  "Atlantic",
  "BDS",
  "BOEM",
  "Boundary Delineation System",
  "Bureau of Ocean Energy Management",
  "Cadastre Theme",
  "Continental Shelf Boundary",
  "Conventional Energy",
  "Energy",
  "Gas",
  "Gulf",
  "ISO 19115",
  "Limit of “8(g) Zone”",
  "Marine Minerals",
  "OCS",
  "OCSLA",
  "OMC",
  "OPDs",
  "Official Protraction Diagrams",
  "Official Submerged Lands Act Boundary",
  "Offshore Marine Cadastre",
  "Oil",
  "Outer Continental Shelf",
  "Outer Continental Shelf Lands Act",
  "Pacific",
  "Renewable Energy",
  "SOBDs",
  "Supplemental Official Block Diagrams",
  "U.S. Territories",
  "Wind"
]
landingPage https://boem-metaport-boem.hub.arcgis.com/datasets/BOEM::ocs-boem-offshore-boundary-lines-1
modified 2026-03-31T00:00:00Z
programCode 
[
  "010:000"
]
publisher 
{
  "name": "Bureau of Ocean Energy Management",
  "@type": "org:Organization"
}
spatial -180.0000,-17.5553,180.0000,74.9874
theme 
[
  "geospatial"
]
title OCS BOEM Offshore Boundary Lines

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