Geographic Mapping Data

The geographic data are built from the Technical Information Management System (TIMS). TIMS is the computerized information system that automates all business and regulatory functions of the Offshore Minerals Management program of the Minerals Management Service (MMS). TIMS consists of two separate databases: an attribute database and a spatial database. The attribute information for offshore activities is stored in the TIMS database. The spatial database is a combination of the ARC/INFO and FINDER databases and contains all the coordinates and topology information for geographic features. The attribute and spatial databases are interconnected through the use of common data elements in both databases, thereby creating the spatial datasets.

The data in the mapping files are made up of straight-line segments. If an arc existed in the original data, it has been replaced with a series of straight lines that approximate the arc. The Gulf of Mexico OCS Region stores all its mapping data in longitude and latitude format. All coordinates are in NAD 27.

File Name	ASCII Files	E00 Files	DXF	Description
5 & 10 Lease Lines Updated 05/06/08	8316 68,290b Summary	8205 105,094b Summary	8425 105,673b Summary	Consists of lease term lines that depict the 5, 8, and 10 year lease term areas.
8g Line Updated 05/31/07	8317 4,506,751b Summary	8206 3,535,491b Summary	8426 4,638,456b Summary	Contains the information that delineates the Limit of the 8(g) Zone.
Active Lease Polygons Updated 08/04/08	8300 4,964,106b Summary	8200 8,218,500b Summary	8400 5,674,156b Summary	Contains all active lease polygons including whole block leases.
Blocks Updated 02/13/08	8311 13,153,291b Summary	8201 184,280,611b Summary	8421 28,276,298b Summary	Contains information that defines the Federal lease blocks for the GOM OCS Region.
Block Polygons - Clipped Updated 02/13/08	8310 18,015,776b Summary	8210 182,694,318b Summary	8410 33,988,325b Summary	Contains information that defines the Federal lease blocks and defines the Federal lease blocks clipped along the Fed/State boundary for the GOM OCS Region. Blocks or portion of blocks of the state side of the Fed/State boundary are not included.
Continental Shelf Boundary (CSB) Updated 02/13/08	8323 89,905b Summary	8220 142,0249b Summary	8432 317,285 Summary	The limit of U.S. jurisdiction for offshore mineral development.
District Boundaries Updated 02/13/08	8314 201,818b Summary	8203 130,236b Summary	8423 155,282b Summary	Contains the outlines of the districts for the GOM Region.
Fairways Updated 02/13/08	8313 6,917,573b Summary	8202 4,128,905b Summary	8422 4,991,973b Summary	Contains the major shipping fairways for the GOM Region.
Fed/State Boundary Updated 02/13/08	8315 63,537b Summary	8204 3,849,861b Summary	8424 5,121,776b Summary	Contains the information that delineates the State Seaward Boundary.
Pipelines Updated 08/15/08	8321 30,917,671b Summary	8219 165,851,920b Summary	8430 50,365,762b Summary	Contains the points and arcs of the pipeline in the GOM. All pipelines existing in the databases are included.
Platforms Updated 08/07/08	8322 992,675b Summary	8211 1,930,398b Summary	8431 4,052,634b Summary	Identifies the location of platforms in GOM. All platforms existing in the database are included.
Protraction Polygons Updated 02/13/08	8318 512,789b Summary	8207 318,365b Summary	8427 330,809b Summary	Contains information that defines a composite polygon of the areas for the GOM Region. This file is based on the OCS Marine Survey Group Official Protraction Diagram (OPD). Each offshore area is defined by an API Number corresponding to those in the API Bulletin Number D12A.
Protraction Polygons - Clipped Updated 02/13/08	8319 5,337,033b Summary	8208 4,125,883b Summary	8428 5,026,818b Summary	Contains information as above and defines the Federal protractions clipped along the Fed/State boundary for the Gulf of Mexico OCS Region. No information in the state side of the Fed/State boundary is included.
Unit Polygons Updated 02/13/08	8320 252,7687b Summary	8209 1,013,690b Summary	8429 650,384b Summary	Defines the surface delineation of the units in the GOM.