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

Within the Gulf of Mexico, 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 Mexico. 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 Mexico 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 of Mexico 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 Mexico 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.

Western | Central | Eastern

 

Gulf of Mexico Index Map

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

Western Gulf of Mexico

 OPD/LM Name

 OPD/LM  Files
Metadata

 SOBD Files
Metadata

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 Mexico

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 Mexico

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