Content:
    Robert E. Johnson

 Pagemasters:
    OEMM Web Team

Multipurpose Marine Cadastre Map Viewer

This online interactive map viewer has integrated submerged lands information consisting of legal, property ownership (cadastre), physical, biological, and cultural information from multiple agencies in a common reference framework. Users can create, view, and print maps from this free, easy to use viewer, or can directly link these GIS data layers (web map services) into their own GIS applications.

Click on the Mapping Viewer or use the left navigation button labeled Map Viewer to access the service.

GIS Data / Shapefiles

Download GIS data files for MMS Offshore block grids, boundaries, active leases, wells, pipelines, and more.

Click on the individual Region names: Atlantic, Gulf, Pacific, Alaska, or use the left navigation buttons to access the data for each Region. Click on the Admin Boundaries button for the new OCS Administrative Boundaries data.

OPD, SOBD, CBD, & Lease Map Diagrams

Official Protraction Diagrams (OPDs) and Lease Maps show the OCS block grids and other boundaries for a  given area. Supplemental Official Block Diagrams (SOBDs) are created for individual blocks which are intersected by offshore boundaries. The zip files may contain both current and historic SOBDs. The older SOBDs are provided for historical reference, but all future activities will be based on the most current SOBDs. Composite Block Diagrams (CBDs) show NAD 27 lease information portrayed on the NAD 83 cadastre, or show other boundaries that have changed over time. Not all OPDs have SOBDs or CBDs associated with them.

Click on the individual Region names: Atlantic, Gulf, Pacific, Alaska, or use the left navigation buttons to access the diagrams for each Region.

MMS Map Gallery

Direct links to a selection of national, regional, local and special purpose maps which are spread throughout the MMS web site.

This page contains court decisions, treaties, legislation, policies, procedures, and other documents that guide the boundary making process on the Outer Continental Shelf.