Free decompression utilities may be downloaded here.
SOBDs are available as Adobe (.pdf) files that have been compressed with PKZIP. OPDs completed after 1996 are also available in Arc/Info Graphics File (.gra) format. The most current approved revision for each Gulf of Mexico Region OPD and SOBD may be viewed and downloaded from the list below. For the purpose of future Lease Sales, always be sure to use the most recent version. Note that not all OPDs contain such boundaries, therefore not all OPDs have SOBDs associated with them.
pdf files.Ī Supplemental Official OCS Block Diagram (SOBD) is prepared for each block intersected by an offshore boundary (Submerged Lands Act Boundary, Limit of "8(g) Zone", National Marine Sanctuaries, etc.). Newer OPDs were prepared electronically and converted to Adobe.
Older OPDs were prepared on mylar with manual cartographic methods and then scanned into Adobe. Shoreline planimetric detail is shown when it falls within the limits of a diagram. OPD sheet names relate to land features, or to hydrographic features contained within the limits of the diagram. OPD names usually coincide with standard topographic sheet names when diagrams include land areas. The OPDs are numbered using the United Nations International Map of the World Numbering System. Geological Survey topographic map series. OPD limits usually approximate the standard 1:250,000 scale U.S. At higher latitudes (48 - 75 degrees) such as Alaska and northern Washington, OPDs are 3 degrees wide. However, in areas further offshore where Leasing Maps have never been generated, the Official Protraction Diagram (OPD) are used.Ī standard OPD is 1 degree in latitude by 2 degrees in longitude (at lower latitudes: 0 - 48 degrees). Because the Leasing Maps reflect so many active leases, they are still being maintained. This has created a wide variety of Leasing Maps in projection, shape and overall size, but the blocks remained consistent, and are never larger than the 5760 acres. Leasing Maps were created as oil/gas leasing expanded offshore of Texas and Louisiana.Įventually the Leasing Maps were projected so far offshore that negative coordinates were required to support the projection. An older format, known as the Leasing Map, was based on Texas or Louisiana State Plane mapping projections. Within the Gulf of Mexico, there are two types of maps that depict blocks that could be leased.
Gulf of Mexico Official Protraction Diagram (OPD) & Leasing Maps (LM) Images These maps indicate the areas affected by the Topographic features Stipulation.įor additional information regarding Biological Stipulations questions may be directed to Mark Belter at (504) 736-1739. Western and Central GOM Topographic Features Stipulation Map Package.This map displays active leases, oil and gas structures, pipelines, area boundaries, lease term lines, oil refineries, supply bases, crude oil terminals, and water depth in meters. Visual 1 Searchable ARCGIS Online Interactive Map (current) 2002-2007 Planning Area Legal Descriptions and Statistics.High-Resolution Geophysical Survey Application - allows the user to view and query High Resolution Geophysical Surveys that were completed in the Gulf of Mexico and submitted to BOEM as Geohazard/Archaeology Reports.
Geographic mapping data available for free downloading includes cadastral, regulatory, and resource features.