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United States Maritime 200NM EEZ and Maritime Boundaries

US National Oceanic and Atmospheric Administration (NOAA)
  • Added 20 Nov 2022

(Version 4.1, updated September 13, 2013) Maritime limits for the United States are measured from the U.S. baseline, recognized as the low-water line along the coast as marked on NOAA's nautical charts in accordance with the articles of the Law of the Sea. The baseline and related maritime limits are reviewed and approved by the interagency U.S. Baseline Committee. The primary purpose of this dataset is to update the official depiction of these maritime limits and boundaries on NOAA's nautical charts. The Office of Coast Survey depicts on its nautical charts the territorial sea (12 nautical miles), contiguous zone (24nm), and exclusive economic zone (200nm, plus maritime boundaries with adjacent/opposite countries). U.S. maritime limits are ambulatory and subject to revision based on accretion or erosion of the charted low water line. For more information about U.S. Maritime Limits and Boundaries and to stay up-to-date, see: For the full FGDC metadata record, see: Coordinates for the US/Canada international boundary, on land and through the Great Lakes, are managed by the International Boundary Commission.


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RegionsNorthern Mariana Islands, Washington, Nome, Samoa, Kiribati, Bahamas, Cuba, Dominican Republic

Technical Details

Layer ID 111106
Data type Vector multilinestring
Feature count 96
Attributes Boundary_ID, Region_Name, Type_of_Feature, Publication_Date, Date_of_Baseline_Committee_Approval, Legal_Authority, Agency_of_Responsibility, Note, Supplemental_Information_Document, Unilateral_Claim, Description,
Services Vector Query API

Added 20 Nov 2022 ago
Last checked 20 Nov 2022 ago
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