Maritime Limits and Boundaries of United States of America

NOAA is responsible for depicting on its nautical charts the limits of the 12 nautical mile Territorial Sea, 24 nautical mile Contiguous Zone, and 200 nautical mile Exclusive Economic Zone (EEZ). The outer limit of each of these zones is measured from the U.S. normal baseline, which coincides with the low water line depicted on NOAA charts and includes closing lines across the entrances of legal bays and rivers, consistent with international law. The U.S. baseline and associated maritime limits are reviewed and approved through the interagency U.S. Baseline Committee, which is chaired by the U.S. Department of State. The Committee serves the function of gaining interagency consensus on the proper location of the baseline using the provisions of the 1958 Convention on the Territorial Sea and the Contiguous Zone, to ensure that the seaward extent of U.S. maritime zones do not exceed the breadth that is permitted by international law. In 2002 and in response to mounting requests for digital maritime zones, NOAA launched a project to re-evaluate the U.S. baseline in partnership with other federal agencies via the U.S. Baseline Committee. The focus of the baseline evaluation was NOAA's largest scale, most recent edition nautical charts as well as supplemental source materials for verification of certain charted features. This dataset is a result of the 2002-present initiative and reflects a multi-year iterative project whereby the baseline and associated maritime limits were re-evaluated on a state or regional basis. In addition to the U.S. maritime limits, the U.S. maritime boundaries with opposite or adjacent countries as well as the US/Canada International Boundary (on land and through the Great Lakes) are also included in this dataset.

Data and Resources

Additional Info

Field Value
Last Updated June 22, 2019, 01:56
Created June 7, 2017, 22:42
access_constraints ["Access Constraints: None | Use Constraints: NOT FOR LEGAL USE. These limits and boundaries were created for internal purposes only to update the charted maritime limits and maritime boundaries on NOAA charts. These limits and boundaries do not represent the official depiction. For official depiction, please see NOAA's paper or raster nautical charts. | Distribution Liability: Users must assume responsibility to determine the appropriate use of this data set. The digital maritime limits are not to be used for a legal definition. The legal definition still remains the depiction on NOAA's nautical charts."]
bbox-east-long -60
bbox-north-lat 74.70884
bbox-south-lat -17.555
bbox-west-long 140
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "2013-09-13"}]
frequency-of-update continual
guid gov.noaa.nmfs.inport:39963
licence ["NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose."]
metadata-date 2019-06-04T13:14:25
metadata-language eng
progress completed
resource-type dataset
responsible-party [{"name": "", "roles": ["pointOfContact", "custodian"]}]
spatial {"type": "Polygon", "coordinates": [[[140.0, -17.555], [-60.0, -17.555], [-60.0, 74.70884], [140.0, 74.70884], [140.0, -17.555]]]}
spatial_harvester true
temporal-extent-begin 2002
temporal-extent-end 2010