Return to search results
BOEM Offshore Marine Cadastre Data Collection
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.
Resources
2 resources available
-
ArcGIS Hub Dataset
WEB PAGE -
ISO-19139 metadata
TEXT/XML
Find Related Datasets
Search by Tags
Click any tag below to search for similar datasets
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| bureauCode |
[
"010:06"
]
|
| contactPoint |
{
"fn": "BOEM_GeoSEAS",
"@type": "vcard:Contact",
"hasEmail": "mailto:geoseas@boem.gov"
}
|
| description | <p>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.</p><p>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.</p><p>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,<span style='color:#b22222;'><strong>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.</strong></span></p> |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "ArcGIS Hub Dataset",
"format": "Web Page",
"accessURL": "https://boem-metaport-boem.hub.arcgis.com/datasets/BOEM::boem-offshore-marine-cadastre-data-collection-1",
"mediaType": "text/html"
},
{
"@type": "dcat:Distribution",
"title": "ISO-19139 metadata",
"accessURL": "https://boem.maps.arcgis.com/sharing/rest/content/items/52736f6cfd9841118e5f9c6410f7e844/info/metadata/metadata.xml?format=iso19139",
"mediaType": "text/xml",
"description": "A copy of the full metadata describing the data."
}
]
|
| identifier | https://www.arcgis.com/home/item.html?id=52736f6cfd9841118e5f9c6410f7e844 |
| issued | 2026-03-06T21:05:58Z |
| keyword |
[
"Administrative",
"Alaska",
"Aliquot 16ths",
"Atlantic",
"BDS",
"BOEM",
"Blocks",
"Boundary Delineation System",
"Bureau of Ocean Energy Management",
"Cadastre Theme",
"Continental Shelf Boundary",
"Conventional Energy",
"Energy",
"Gas",
"Geospatial",
"Gulf",
"ISO 19115",
"Limit of “8(g) Zone”",
"Marine Minerals",
"NGDA",
"NGDAID205",
"National Geospatial Data Asset",
"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",
"Protractions",
"Renewable Energy",
"SOBDs",
"Supplemental Official Block Diagrams",
"U.S. Territories",
"Wind"
]
|
| landingPage | 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/ |
| modified | 2026-03-06T21:26:14Z |
| programCode |
[
"010:000"
]
|
| publisher |
{
"name": "Bureau of Ocean Energy Management",
"@type": "org:Organization"
}
|
| spatial | -180.0000,8.2891,180.0000,74.9964 |
| theme |
[
"geospatial"
]
|
| title | BOEM Offshore Marine Cadastre Data Collection |
