U.S. Maritime Boundaries and Coast Guard Districts

(Version 4.0, 7/26/2013) Maritime limits for the United States are measured from the U.S. baseline, which is recognized as the low-water line along the coast as marked on the official U.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 are subject to revision based on accretion or erosion of the charted low water line. For more information about U.S. Maritime Limits/Boundaries, and to download data, see: http://www.nauticalcharts.noaa.gov/csdl/mbound.htm For the full FGDC metadata record, see: http://www.ncddc.noaa.gov/approved_recs/nos_de/ocs/ocs/ocs/MB_ParentDataset.html

Data and Resources

Field Value
guid c5f75f7bf1554bd596dcae72d5aef257
metadata_source arcgis
metadata_type geospatial
old-spatial {"type": "Polygon", "coordinates": [[[-119.9621, 23.8257], [-119.9621, 36.739], [-93.4411, 36.739], [-93.4411, 23.8257], [-119.9621, 23.8257]]]}
spatial {"type": "Polygon", "coordinates": [[[-119.9621, 23.8257], [-119.9621, 36.739], [-93.4411, 36.739], [-93.4411, 23.8257], [-119.9621, 23.8257]]]}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • boundaries
  • ckan
  • coast-guard
  • federal
  • geo
  • geoss
  • marine-boundaries
  • maritime
  • maritime-limits
  • national
  • north-america
  • territorial-sea
  • united-states
  • usa
isopen False
metadata_created 2025-11-21T21:46:08.299389
metadata_modified 2025-11-21T21:46:08.299393
notes (Version 4.0, 7/26/2013) Maritime limits for the United States are measured from the U.S. baseline, which is recognized as the low-water line along the coast as marked on the official U.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 are subject to revision based on accretion or erosion of the charted low water line. For more information about U.S. Maritime Limits/Boundaries, and to download data, see: http://www.nauticalcharts.noaa.gov/csdl/mbound.htm For the full FGDC metadata record, see: http://www.ncddc.noaa.gov/approved_recs/nos_de/ocs/ocs/ocs/MB_ParentDataset.html
num_resources 1
num_tags 16
title U.S. Maritime Boundaries and Coast Guard Districts