{"accessLevel": "public", "bureauCode": ["010:06"], "contactPoint": {"@type": "vcard:Contact", "fn": "BOEM_GeoSEAS", "hasEmail": "mailto:geoseas@boem.gov"}, "description": "<div style='text-align:Left;'><div><div><p><span>Outer Continental Shelf (OCS) blocks serve as the legal definition for BOEM offshore boundary coordinates used to define small geographic areas within an Official Protraction Diagram (OPD) or Leasing Map (LM) for leasing and administrative purposes. These polygons are clipped to the Submerged Land Act Boundary and Continental Shelf Boundaries. Only the most recently published paper or PDF versions of the OPDs, LMs or Supplemental Official Block Diagrams (SOBDs) should be used for official or legal purpose. </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. 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": [{"@type": "dcat:Distribution", "accessURL": "https://boem-metaport-boem.hub.arcgis.com/api/download/v1/items/b1ac83083464455588a893bf2b845291/csv?layers=9", "format": "CSV", "mediaType": "text/csv", "title": "CSV"}, {"@type": "dcat:Distribution", "accessURL": "https://boem-metaport-boem.hub.arcgis.com/api/download/v1/items/b1ac83083464455588a893bf2b845291/excel?layers=9", "format": "XLSX", "mediaType": "application/vnd.ms-excel", "title": "Excel"}, {"@type": "dcat:Distribution", "accessURL": "https://boem-metaport-boem.hub.arcgis.com/api/download/v1/items/b1ac83083464455588a893bf2b845291/featureCollection?layers=9", "format": "TXT", "mediaType": "text/plain", "title": "Feature Collection"}, {"@type": "dcat:Distribution", "accessURL": "https://boem-metaport-boem.hub.arcgis.com/api/download/v1/items/b1ac83083464455588a893bf2b845291/filegdb?layers=9", "format": "ZIP", "mediaType": "application/zip", "title": "File Geodatabase"}, {"@type": "dcat:Distribution", "accessURL": "https://boem-metaport-boem.hub.arcgis.com/api/download/v1/items/b1ac83083464455588a893bf2b845291/geoPackage?layers=9", "format": "GPKG", "mediaType": "application/geopackage+sqlite3", "title": "GeoPackage"}, {"@type": "dcat:Distribution", "accessURL": "https://boem-metaport-boem.hub.arcgis.com/api/download/v1/items/b1ac83083464455588a893bf2b845291/geojson?layers=9", "format": "GeoJSON", "mediaType": "application/vnd.geo+json", "title": "GeoJSON"}, {"@type": "dcat:Distribution", "accessURL": "https://boem-metaport-boem.hub.arcgis.com/api/download/v1/items/b1ac83083464455588a893bf2b845291/kml?layers=9", "format": "KML", "mediaType": "application/vnd.google-earth.kml+xml", "title": "KML"}, {"@type": "dcat:Distribution", "accessURL": "https://boem-metaport-boem.hub.arcgis.com/api/download/v1/items/b1ac83083464455588a893bf2b845291/shapefile?layers=9", "format": "ZIP", "mediaType": "application/zip", "title": "Shapefile"}, {"@type": "dcat:Distribution", "accessURL": "https://boem-metaport-boem.hub.arcgis.com/api/download/v1/items/b1ac83083464455588a893bf2b845291/sqlite?layers=9", "format": "GDB", "mediaType": "application/geopackage+sqlite3", "title": "SQLite Geodatabase"}, {"@type": "dcat:Distribution", "accessURL": "https://boem-metaport-boem.hub.arcgis.com/datasets/BOEM::ocs-gulf-nad27-block-polygons-2nd-division", "format": "Web Page", "mediaType": "text/html", "title": "ArcGIS Hub Dataset"}, {"@type": "dcat:Distribution", "accessURL": "https://boem.maps.arcgis.com/sharing/rest/content/items/b1ac83083464455588a893bf2b845291/info/metadata/metadata.xml?format=iso19139", "description": "A copy of the full metadata describing the data.", "mediaType": "text/xml", "title": "ISO-19139 metadata"}, {"@type": "dcat:Distribution", "accessURL": "https://services7.arcgis.com/G5Ma95RzqJRPKsWL/arcgis/rest/services/OCS_Gulf_NAD27_Block_Polygons___2nd_Division/FeatureServer/9", "format": "ArcGIS GeoServices REST API", "mediaType": "application/json", "title": "ArcGIS GeoService"}], "identifier": "https://www.arcgis.com/home/item.html?id=b1ac83083464455588a893bf2b845291&sublayer=9", "issued": "2026-05-21T13:51:21Z", "keyword": ["Administrative", "Alaska", "Atlantic", "BDS", "BOEM", "Blocks", "Boundary Delineation System", "Bureau of Ocean Energy Management", "Cadastre Theme", "Conventional Energy", "Energy", "Gas", "Gulf", "ISO 19115", "Marine Minerals", "OCS", "OMC", "OPDs", "Official Protraction Diagrams", "Offshore Marine Cadastre", "Oil", "Outer Continental Shelf", "Pacific", "Renewable Energy", "SOBDs", "Supplemental Official Block Diagrams", "U.S. Territories", "Wind"], "landingPage": "https://boem-metaport-boem.hub.arcgis.com/datasets/BOEM::ocs-gulf-nad27-block-polygons-2nd-division", "modified": "2026-05-27T18:39:19.187Z", "programCode": ["010:000"], "publisher": {"@type": "org:Organization", "name": "Bureau of Ocean Energy Management"}, "spatial": "-97.2115,23.8230,-81.1372,30.2463", "theme": ["geospatial"], "title": "OCS Gulf NAD27 Block Polygons - 2nd Division"}