Official Protraction Diagrams (OPDs) And Leasing Maps (LMs) & Supplemental Official OCS Block Diagrams (SOBDs)

Within the Gulf of America, there are two types of maps that depict blocks that could be leased. An older format, known as the Leasing Map, was based on Texas or Louisiana State Plane mapping projections. Leasing Maps were created as oil/gas leasing expanded offshore of Texas and Louisiana.

Eventually the Leasing Maps were projected so far offshore that negative coordinates were required to support the projection. 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. Because the Leasing Maps reflect so many active leases, they are still being maintained. However, in areas further offshore where Leasing Maps have never been generated, the Official Protraction Diagram (OPD) is used.

A standard OPD is 1 degree in latitude by 2 degrees in longitude (at lower latitudes: 0 - 48 degrees) as in the Gulf of America. OPD limits usually approximate the standard 1:250,000 scale U.S. Geological Survey topographic map series. The OPDs are numbered using the United Nations International Map of the World Numbering System. OPD names usually coincide with standard topographic sheet names when diagrams include land areas. OPD sheet names relate to land features, or to hydrographic features contained within the limits of the diagram. Shoreline planimetric detail is shown when it falls within the limits of a diagram. Older OPDs were prepared on mylar with manual cartographic methods and then scanned into Adobe .pdf files. Newer OPDs were prepared electronically and converted to Adobe .pdf files.

NOTE: Gulf of America Region OPDs that show the Submerged Lands Act and Section 8(g) Zone boundaries do not reflect recent shoreline changes.  These boundaries were permanently immobilized (“fixed”) by actions of the Supreme Court for Louisiana (1981), Mississippi (1990), Alabama (1993), and Texas (1998).  Accordingly, the shoreline associated with these boundaries as shown on the OPDs has not been updated.  The shoreline for the Gulf Coast of Florida as shown on the OPDs was last revised in 1999.

Gulf SOBD Images

A 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.). Note that not all OPDs contain such boundaries, therefore not all OPDs have SOBDs associated with them. For the purpose of future Lease Sales, always be sure to use the most recent version.

NOTE: Gulf of America Region SOBDs do not reflect recent shoreline changes.  The Submerged Lands Act and Section 8(g) Zones boundaries were permanently immobilized (“fixed”) by actions of the Supreme Court for Louisiana (1981), Mississippi (1990), Alabama (1993), and Texas (1998).  Accordingly, the boundaries as shown on the SOBDs corresponds to the year that the boundary was fixed.  The shoreline for the Gulf Coast of Florida was last revised in 1999.

Listed in the table below are LMs/OPDs & SOBDs available in PDF format:

Scroll down the page to access individual LMs/OPDs & SOBDs available in PDF format, or click on the map to use the OPD/SOBD finder application:

SOBD MAP

Other sources for OPDs (also known as PROTRACTION POLYGONS) data are at Geographic Mapping Data.

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Individual Gulf Region "OPDs/Leasing Maps & Supplemental Official Protraction Diagrams (SOBDs)

Western Gulf of America

OPD/LM NameOPD/LM FilesSOBD Files
TX1
South Padre Island Area
TX1
October 1, 2014
TX1
TX1A
South Padre Island Area, East Addition
TX1A
October 1, 2014
TX1A
TX2
North Padre Island Area
TX2
November 1, 2000
TX2
TX2A
North Padre Island Area, East Addition
TX2A
November 1, 2000
 Not Applicable
TX3
Mustang Island Area
TX3
November 1, 2000
TX3
TX3A
Mustang Island Area, East Addition
TX3A
September 3, 2002
 Not Applicable
TX4
Matagorda Island Area
TX4
November 1, 2000
TX4
TX5
Brazos Area
TX5
November 1, 2000
TX5
TX5B
Brazos Area, South Addition
TX5B
November 1, 2000
 Not Applicable
TX6
Galveston Area
TX6
November 1, 2000
TX6
TX6A
Galveston Area, South Addition
TX6A
November 1, 2000
 Not Applicable
TX7
High Island Area
TX7
November 1, 2000
TX7
TX7A
High Island Area, East Addition
TX7A
November 1, 2000
TX7A
TX7B
High Island Area, South Addition
TX7B
November 1, 2000
TX7B
TX7C
High Island Area, East Addition, South Extension
TX7C
November 1, 2000
TX7C
TX8
Sabine Pass Area
TX8
November 1, 2000
TX8
LA1A
West Cameron Area, West Addition
LA1A
February 28, 2007
 Not Applicable
LA1B
West Cameron Area, South Addition
LA1B
February 28, 2007
 Not Applicable
LA12
Sabine Pass Area
LA12
July 1, 2011
LA12
NG 14-03
Corpus Christi
NG 14-03
November 1, 2000
 Not Applicable
NG 14-06
Port Isabel
NG 14-06
October 1, 2014
NG 14-06
NG 15-01
East Breaks
NG 15-01
November 1, 2000
 Not Applicable
NG 15-02
Garden Banks
NG 15-02
February 28, 2007
NG 15-02
NG 15-04
Alaminos Canyon
NG 15-04
October 1, 2014
NG 15-04
NG 15-05
Keathley Canyon
NG 15-05
October 1, 2014
NG 15-05
NG 15-08
Sigsbee Escarpment
NG 15-08
October 1, 2014
NG 15-08

Central Gulf of America

OPD/LM NameOPD/LM FilesSOBD Files
LA1
West Cameron Area
LA1
July 1, 2011
LA1
LA1A
West Cameron Area, West Addition
LA1A
February 28, 2007
 Not Applicable
LA1B
West Cameron Area, South Addition
LA1B
February 28, 2007
 Not Applicable
LA2
East Cameron Area
LA2
November 1, 2000
LA2
LA2A
East Cameron Area, South Addition
LA2A
November 1, 2000
 Not Applicable
LA3
Vermilion Area
LA3
November 1, 2000
LA3
LA3A
South Marsh Island Area
LA3A
November 1, 2000
 Not Applicable
LA3B
Vermilion Area, South Addition
LA3B
November 1, 2000
 Not Applicable
LA3C
South Marsh Island Area, South Addition
LA3C
November 1, 2000
 Not Applicable
LA3D
South Marsh Island Area, North Addition
LA3D
November 1, 2000
LA3D
LA4
Eugene Island Area
LA4
November 1, 2000
LA4
LA4A
Eugene Island Area, South Addition
LA4A
November 1, 2000
 Not Applicable
LA5
Ship Shoal Area
LA5
November 1, 2000
LA5
LA5A
Ship Shoal Area, South Addition
LA5A
November 1, 2000
 Not Applicable
LA6
South Timbalier Area
LA6
November 1, 2000
LA6
LA6A
South Timbalier Area, South Addition
LA6A
November 1, 2000
 Not Applicable
LA6B
South Pelto Area
LA6B
November 1, 2000
LA6B
LA6C
Bay Marchand Area
LA6C
November 1, 2000
LA6C
LA7
Grand Isle Area
LA7
November 1, 2000
LA7
LA7A
Grand Isle Area, South Addition
LA7A
February 17, 2004
 Not Applicable
LA8
West Delta Area
LA8
November 1, 2000
LA8
LA8A
West Delta Area, South Addition
LA8A
November 1, 2000
LA8A
LA9
South Pass Area
LA9
November 1, 2000
LA9
LA9A
South Pass Area, South and East Addition
LA9A
November 1, 2000
LA9A
LA10
Main Pass Area
LA10
November 1, 2000
LA10
LA10A
Main Pass Area, South and East Addition
LA10A
November 1, 2000
 Not Applicable
LA10B
Breton Sound Area
LA10B
November 1, 2000
LA10B
LA11
Chandeleur Area
LA11
November 1, 2000
LA11
LA11A
Chandeleur Area, East Addition
LA11A
November 1, 2000
 Not Applicable
LA12
Sabine Pass Area
LA12
July 1, 2011
LA12
NG 15-03
Green Canyon
NG 15-03
November 1, 2000
 Not Applicable
NG 15-05
Keathley Canyon
NG 15-05
October 1, 2014
NG 15-05
NG 15-06
Walker Ridge
NG 15-06
November 1, 2000
 Not Applicable
NG 15-08
Sigsbee Escarpment
NG 15-08
October 1, 2014
NG 15-08
NG 15-09
Amery Terrace
NG 15-09
October 1, 2014
NG 15-09
NG 16-01
Atwater Valley
NG 16-01
November 1, 2000
 Not Applicable
NG 16-02
Lloyd Ridge
NG 16-02
August 1, 2008
NG 16-02
NG 16-04
Lund
NG 16-04
November 1, 2000
 Not Applicable
NG 16-05
Henderson
NG 16-05
August 1, 2008
NG 16-05
NG 16-07
Lund South
NG 16-07
October 1, 2014
NG 16-07
NG 16-08
Florida Plain
NG 16-08
February 28, 2007
NG 16-08
NH 15-12
Ewing Bank
NH 15-12
November 1, 2000
 Not Applicable
NH 16-04
Mobile
NH 16-04
July 1, 2011
NH 16-04
NH 16-05
Pensacola
NH 16-05
October 1, 2014
NH 16-05
NH 16-07
Viosca Knoll
NH 16-07
November 1, 2000
NH 16-07
NH 16-08
Destin Dome
NH 16-08
October 1, 2014
NH 16-08
NH 16-10
Mississippi Canyon
NH 16-10
November 1, 2000
 Not Applicable
NH 16-11
De Soto Canyon
NH 16-11
August 1, 2008
NH 16-11

Eastern Gulf of America

OPD/LM NameOPD/LM FilesSOBD Files
NF 17-01
Tortugas Valley
NF 17-01
September 9, 1998
NF 17-01
NG 16-02
Lloyd Ridge
NG 16-02
August 1, 2008
NG 16-02
NG 16-03
The Elbow
NG 16-03
September 1, 1999
 Not Applicable
NG 16-05
Henderson
NG 16-05
August 1, 2008
NG 16-05
NG 16-06
Vernon Basin
NG 16-06
September 1, 1999
 Not Applicable
NG 16-08
Florida Plain
NG 16-08
February 28, 2007
NG 16-08
NG 16-09
Howell Hook
NG 16-09
September 1, 1999
 Not Applicable
NG 16-11
Campeche Escarpment
NG 16-11
September 9, 1998
NG 16-11
NG 16-12
Rankin
NG 16-12
August 1, 2008
NG 16-12
NG 17-01
St. Petersburg
NG 17-01
October 1, 2014
NG 17-01
NG 17-04
Charlotte Harbor
NG 17-04
October 1, 2014
NG 17-04
NG 17-05
West Palm Beach
NG 17-05
October 1, 2014
 Not Applicable
NG 17-07
Pulley Ridge
NG 17-07
October 1, 2014
NG 17-07
NF 17-08
Miami
NG 17-08
October 1, 2014
NF 17-08
NG 17-10
Dry Tortugas
NG 17-10
October 1, 2014
NG 17-10
NG 17-11
Key West
NG 17-11
October 1, 2014
NG 17-11
NH 16-05
Pensacola
NH 16-05
October 1, 2014
NH 16-05
NH 16-08
Destin Dome
NH 16-08
October 1, 2014
NH 16-08
NH 16-09
Apalachicola
NH 16-09
October 1, 2014
NH 16-09
NH 16-11
De Soto Canyon
NH 16-11
August 1, 2008
NH 16-11
NH 16-12
Florida Middle Ground
NH 16-12
September 1, 1999
 Not Applicable
NH 17-07
Gainesville
NH 17-07
October 1, 2014
NH 17-07
NH 17-10
Tarpon Springs
NH 17-10
October 1, 2014
NH 17-10