Outer Continental Shelf Submerged Lands Act Boundary - Alaska Region NAD83

Metadata Updated: January 12, 2021

This data set contains the Submerged Lands Act (SLA) boundary (also known as State Seaward Boundary (SSB), or Fed State Boundary) in ESRI shapefile format for the BOEM Alaska Region. The SLA boundary defines the seaward limit of a state's submerged lands and the landward boundary of federally managed OCS lands. In the BOEM Alaska Region it is projected 3 nautical miles offshore from the baseline. Further information on the SLA and development of this line from baseline points can be found in OCS Report MMS 99-0006: Boundary Development on the Outer Continental Shelf https://www.boem.gov/BOEM-Newsroom/Library/Publications/1999/99-0006-pdf.aspx. Due to slight differences in process and purpose, NOAA's 3 nautical mile line depicted on its charts may differ in some areas from the SLA boundary depicted on BOEM maps and OPDs and should not be confused with the SLA boundary. Therefore this boundary is the only boundary that should be used to depict state/federal seperation of jurisdiction for submerged lands. Because GIS projection and topology functions can change or generalize coordinates, these GIS files are considered to be approximate and are NOT an OFFICIAL record for the exact SLA boundary. The Official Protraction Diagrams (OPDs) and Supplemental Official OCS Block Diagrams (SOBDs) serve as the legal definition for offshore boundary coordinates and area descriptions.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Date April 21, 2017
Metadata Created Date September 28, 2020
Metadata Updated Date January 12, 2021
Reference Date(s) October 24, 2008 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from DOI Open Data

Graphic Preview

An image of the BOEM Alaska Region, showing the official SLA boundary with state review as a red solid line and the unofficial SLA boundary lacking state review as a red dashed line

Additional Metadata

Resource Type Dataset
Metadata Date April 21, 2017
Metadata Created Date September 28, 2020
Metadata Updated Date January 12, 2021
Reference Date(s) October 24, 2008 (publication)
Responsible Party Bureau of Ocean Energy Management, Mapping and Boundary Branch (Point of Contact)
Contact Email
Access Constraints Use Constraints: The data was developed within the U.S. Government; no proprietary rights may be attached to them nor may they be sold to the U.S. Government as part of any procurement of digital data products or services., Access Constraints: None. The BOEM Offshore Cadastral Data is in the public domain.
Bbox East Long -130.651104
Bbox North Lat 71.439231
Bbox South Lat 52.491191
Bbox West Long -171.959349
Coupled Resource
Frequency Of Update asNeeded
Graphic Preview Description An image of the BOEM Alaska Region, showing the official SLA boundary with state review as a red solid line and the unofficial SLA boundary lacking state review as a red dashed line
Graphic Preview File https://www.boem.gov/uploadedImages/BOEM/Oil_and_Gas_Energy_Program/Mapping_and_Data/Alaska/AK_SLA_BG.jpg
Graphic Preview Type JPEG
Guid
Harvest Object Id 70d2979a-7604-409a-9e9b-7c58b81cda76
Harvest Source Id 5b7e4031-1e2d-428b-92e2-56554bbd7371
Harvest Source Title DOI Open Data
Licence As is. No responsibility is assumed for the correctness of this data.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester true
Temporal Extent Begin 1994-01-01
Temporal Extent End 2006-01-01

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