The US territorial sea is a maritime zone, over which the United States exercises sovereignty. Each coastal State claims a territorial sea that extends seaward up to 12 nautical miles from its coastal baseline. As defined by maritime law, the coastal State exercises sovereignty over its territorial sea, the air space above it, and the seabed and subsoil beneath it. The U.S. territorial sea extends 12 nautical miles from the coastal baseline. The zone is usually used in concert with several other Limits and Boundary Lines for Maritime purposes.Maritime limits for the United States are measured from the US baseline, which is recognized as the low-water line along the coast as marked on NOAA's nautical charts. The baseline and related maritime limits are reviewed and approved by the interagency US Baseline Committee. The Office of Coast Survey depicts on its nautical charts the territorial sea (12nm), contiguous zone (24nm), and exclusive economic zone (200nm, plus maritime boundaries with adjacent/opposite countries. US maritime limits are ambulatory and subject to revision based on accretion or erosion of the charted low water line. Dataset SummaryThis map service contains data from NOAA and BOEM sources that address USA Regional coastal areas and are designed to be used together within an ArcGIS.com web map. These include: World Exclusive Economic Zone (EEZ) from NOAA Office of Coast SurveyContiguous Zone (CZ) from NOAA Office of Coast SurveyTerritorial Sea (TS) Boundary from NOAA Office of Coast SurveyRevenue Sharing Boundary [Section 8(g) of OCSLA Zone Boundary] from Bureau of Ocean Energy Management (BOEM)Submerged Land Act Boundaries (SLA) aka State Seaward Boundary (SSB)State Administrative Boundary from Bureau of Ocean Energy Management (BOEM)Continental Shelf Boundary (CSB) from Bureau of Ocean Energy Management (BOEM)Regional Maritime Planning Area Boundaries from NOAA Office of Coast SurveyInternational Provisional Maritime Boundary from NOAA (International Boundary Commission)The data for this layer were obtained from MarineCadastre.gov and is updated regularly.More information about U.S. Maritime Limits and BoundariesLink to source metadataWhat can you do with this layer?The features in this layer are used for areas and limits of coastal planning areas, or offshore planning areas, applied within ArcGIS Desktop and ArcGIS Online. A depiction of the territorial sea boundaries helps disputing parties reach an agreement as in the case of one state's boundary overlapping with another state's territorial sea, in which case the border is taken as the median point between the states' baselines, unless the states in question agree otherwise. A state can also choose to claim a smaller territorial sea.Conflicts still occur whenever a coastal nation claims an entire gulf as its territorial waters while other nations only recognize the more restrictive definitions of the UN convention. Two recent conflicts occurred in the Gulf of Sidra where Libya has claimed the entire gulf as its territorial waters and the US has twice enforced freedom of navigation rights, in the 1981 and 1989 Gulf of Sidra incidents.This layer is a feature service, which means it can be used for visualization and analysis throughout the ArcGIS Platform. This layer is not editable.

Borders of territorial waters (12 nautical miles from baseline) in the Baltic Sea.

It is based on a dataset by the European Environment Agency (https://www.eea.europa.eu/data-and-maps/data/maritime-boundaries). The Russian borders and some small segments are based in OpenStreetMap. See the attribute table for details.

The Swedish territorial waters file was edited in November 2019. The source was the Swedish Maritime Administration (https://www.sjofartsverket.se/sv/Maritima-Tjanster/Havsgranser/)

(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: 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/MB_ParentDataset.html. Coordinates for the US/Canada international boundary, on land and through the Great Lakes, are managed by the International Boundary Commission.

An exclusive economic zone (EEZ) is a sea zone prescribed by the United Nations Convention on the Law of the Sea over which a sovereign state has special rights over the exploration and use of marine resources, including energy production from water and wind. This maritime boundary is designed to be used with other marine boundaries in order to help determine areas of trade, commerce and transportation. The 200 NM zone is measured, country-by-country, from another maritime boundary, the baseline (usually but not in all cases the mean low-water mark, used is not the same thing as the coast line. For each country, obtain the official list of the baseline points from the United Nations under Maritime Space.The exclusive economic zone stretches much further into sea than the territorial waters, which end at 12 NM (22 km) from the coastal baseline (if following the rules set out in the UN Convention on the Law of the Sea). Thus, the EEZ includes the contiguous zone. States also have rights to the seabed of what is called the continental shelf up to 350 NM (648 km) from the coastal baseline, beyond the EEZ, but such areas are not part of their EEZ. The legal definition of the continental shelf does not directly correspond to the geological meaning of the term, as it also includes the continental rise and slope, and the entire seabed within the EEZ. The chart below diagrams the overlapping jurisdictions which are part of the EEZ. When the (EEZ) boundary is between countries which are separated by less than 200NM is settled by international tribunals at any arbitrary line. Many countries are still in the process of extending their EEZs beyond 200NM using criteria defined in the United Nations Convention on the Law of the Sea. Dataset Summary The data for this layer were obtained from https://www.marineregions.org/published here. Link to source metadata.Preferred Citation: Flanders Marine Institute (2023). Maritime Boundaries Geodatabase: Maritime Boundaries and Exclusive Economic Zones (200NM), version 12. Available online at https://www.marineregions.org/. https://doi.org/10.14284/632This layer is a feature service, which means it can be used for visualization and analysis throughout the ArcGIS Platform. This layer is not editable.

The Real Map of Ireland represents Ireland's marine territory of over 220 million acres which is ten times the size of the island of Ireland. The currently designated Irish Continental Shelf, represented by the red line on the map. shows Ireland's current territorial waters which extends out across the North Atlantic Ocean and includes parts of the Irish and Celtic Seas. This area also includes one of the largest marine Exclusive Economic Zones in the European Union. The Continental Shelf of a coastal State comprises the seabed and subsoil of submarine areas that extend to 200 nautical miles from its territorial sea baselines or further if the natural prolongation of its land mass is beyond this. The coastal State exercises over the continental shelf sovereign rights for the purpose of exploring it and exploiting its natural resources. Where a margin extends beyond 200 nautical miles, a coastal state may extend its continental shelf limit, subject to the criteria set out in Article 76 of the United Nations Convention on the Law of the Sea. The Real Map of Ireland released January 2008. The Real Map of Ireland vision produced to support the promotion of Ireland's marine resource. The Real Map of Ireland produced by the Marine Institute, Ireland's national agency for marine research, technological development and innovation.

The National Oceanic and Atmospheric Administration (NOAA) Raster Nautical Charts (RNC), found in the A-16 National Geospatial Data Asset Portfolio, provides a seamless mosaic of the NOAA RNC. This map layer portrays NOAA RNC which are full-color, geo-referenced, digital images of NOAA navigational charts. Source charts are updated once per month.

This map layer is not to be used for navigation. NOAA is responsible for building and maintaining a suite of more than 1000 nautical charts that are used by commercial and recreational mariners to navigate the U.S. and its territorial waters safely. A nautical chart is a graphic portrayal of the marine environment. They are used to lay out courses and navigate ships by the shortest and most economically safe route.Thumbnail image courtesy of: National Oceanic and Atmospheric Administration (NOAA)

Title 27 of the Palau National Code as amended by the Act (SIXTH OLBIIL ERA KELULAU) to Amend Chapter 1 of Title 27 of the Palau National Code defines the territorial sea as having a twelve miles’ breadth. The inner boundary of the territorial sea of each island or atoll is the baseline which is defined as a continuous line which encircles an island or atoll. The baseline from which the zones designated in this chapter are to be measured as follows: (a) The baseline of an island or portion of an island lacking a barrier reef, fringing reef, or other reef system is the low water line of the island as marked on large scale charts officially recognized by the national government. (b) The baseline of an atoll or island or portion of an island having a barrier reef, fringing reef, or other reef system is a line following the contour of the seaward edge of the reef system, which line connects those outermost elevations of the reef which are above water at low tide, and which line exists as marked on large scale charts officially recognized by the national government. The outer boundary is a line, every point of which is twelve nautical miles seaward of the nearest point on the baseline.

Work is still in progress to publish Palau’s 12 nautical miles zone on UN DOALOS. As such this layer is extracted from the Global Marine Regions Open Database platform. (marineregion.org)

https://www.un.org/depts/los/LEGISLATIONANDTREATIES/PDFFILES/PLW_1990_PNC.pdf https://www.un.org/depts/los/LEGISLATIONANDTREATIES/PDFFILES/PLW_2003_PNC.pdf

The International Map of the World (IMW) series is no longer maintained, and printed copies of this map are no longer available. The Australian portion of the series consists of 49 maps. They were produced to an international specification using the R502 series at 1:250,000 scale as source material. Production commenced in 1926 and was completed in 1978. The maps were revised from time to time and the last reprint was undertaken in 2003. Each standard map sheet covers 4 degrees of latitude by 6 degrees of longitude and was produced using a Lambert Conformal Conic projection with 2 standard parallels. The series has recently been superseded by the 1:1 000 000 topographic map general reference.

The map is designed to be used as a basemap by marine GIS professionals and as a reference map by anyone interested in ocean data. The basemap focuses on bathymetry. It also includes inland waters and roads, overlaid on land cover and shaded relief imagery.The Ocean Base map currently provides coverage for the world down to a scale of ~1:577k; coverage down to ~1:72k in United States coastal areas and various other areas; and coverage down to ~1:9k in limited regional areas.The World Ocean Reference is designed to be drawn on top of this map and provides selected city labels throughout the world. This web map lets you view the World Ocean Base with the Reference service drawn on top. Article in the Fall 2011 ArcUser about this basemap: "A Foundation for Ocean GIS".The map was compiled from a variety of best available sources from several data providers, including General Bathymetric Chart of the Oceans GEBCO_08 Grid version 20100927 and IHO-IOC GEBCO Gazetteer of Undersea Feature Names August 2010 version (https://www.gebco.net), National Oceanic and Atmospheric Administration (NOAA) and National Geographic for the oceans; and Garmin, and Esri for topographic content. You can contribute your bathymetric data to this service and have it served by Esri for the benefit of the Ocean GIS community. For details on the users who contributed bathymetric data for this map via the Community Maps Program, view the list of Contributors for the Ocean Basemap. The basemap was designed and developed by Esri. The GEBCO_08 Grid is largely based on a database of ship-track soundings with interpolation between soundings guided by satellite-derived gravity data. In some areas, data from existing grids are included. The GEBCO_08 Grid does not contain detailed information in shallower water areas, information concerning the generation of the grid can be found on GEBCO's website: https://www.gebco.net/data_and_products/gridded_bathymetry_data/. The GEBCO_08 Grid is accompanied by a Source Identifier (SID) Grid which indicates which cells in the GEBCO_08 Grid are based on soundings or existing grids and which have been interpolated. The latest version of both grids and accompanying documentation is available to download, on behalf of GEBCO, from the British Oceanographic Data Centre (BODC) https://www.bodc.ac.uk/data/online_delivery/gebco/.The names of the IHO (International Hydrographic Organization), IOC (intergovernmental Oceanographic Commission), GEBCO (General Bathymetric Chart of the Oceans), NERC (Natural Environment Research Council) or BODC (British Oceanographic Data Centre) may not be used in any way to imply, directly or otherwise, endorsement or support of either the Licensee or their mapping system.Tip: Here are some famous oceanic locations as they appear this map. Each URL launches this map at a particular location via parameters specified in the URL: Challenger Deep, Galapagos Islands, Hawaiian Islands, Maldive Islands, Mariana Trench, Tahiti, Queen Charlotte Sound, Notre Dame Bay, Labrador Trough, New York Bight, Massachusetts Bay, Mississippi Sound

Abstract:The Seas and Submerged Lands Act (SSLA) 1973 is the Australian legislation that provides the domestic legal framework for Australia to declare its international offshore maritime zones, as provided for by the United Nations Convention on the Law of the Sea (UNCLOS) to which Australia is a party. Proclamations under the SSLA establish the territorial sea baseline, the territorial sea, the contiguous zone, the exclusive economic zone and the continental shelf. This service depicts official spatial representation of these proclamations. The service includes feature layers: Normal and Straight baselines limits and locations; Contiguous Zone and limit; Territorial Sea Zone and limit; Exclusive Economic Zone (EEZ), limits and locations; Continental Shelf limit and locations. NOTE: There are two versions of the Exclusive Economic Zone (EEZ) provided. One depicts the EEZ as proclaimed in the Seas and Submerged Lands Act 1973 - Proclamation under section 10B (26/07/1994). The second version includes amendments reflecting the provisions of the signed but not yet ratified Treaty between the Government of Australia and the Government of the Republic of Indonesia, establishing an Exclusive Economic Zone Boundary and Certain Seabed Boundaries (Perth, 14 march 1997). The version reflecting the Perth Treaty EEZ limits and area should be the standard depiction.© Commonwealth of Australia (Geoscience Australia) 2021.Downloads and Links:Web ServicesSeas and Submerged Lands Act 1973 MapServer Seas and Submerged Lands Act 1973 WMTSSeas and Submerged Lands Act 1973 WMSSeas and Submerged Lands Act 1973 WFSDownloads available from the expanded catalogue link, belowMetadata URL:https://pid.geoscience.gov.au/dataset/ga/144571

The Territorial Sea of the United States of America By the President of the United States of America A Proclamation of 27 December 1988 states the extension of the territorial sea of the United States of America, the Commonwealth of Puerto Rico, Guam, American Samoa, the United States Virgin Islands, the Commonwealth of the Northern Mariana Islands, and any other territory or possession over which the United States exercises sovereignty.

The territorial sea of the United States henceforth extends to 12 nautical miles from the baselines of the United States determined in accordance with international law. In accordance with international law, as reflected in the applicable provisions of the 1982 Convention on the Law of the Sea, within the territorial sea of the United States, the ships of all countries enjoy the right of innocent passage and the ships and aircraft of all countries enjoy the right of transit passage through international straits. Nothing in this Proclamation: (a) extends or otherwise alters existing federal or State law or any jurisdiction, rights, legal interests, or obligations derived therefrom, or (b) impairs the determination, in accordance with international law, of any maritime boundary of the United States with a foreign jurisdiction.

https://www.un.org/depts/los/LEGISLATIONANDTREATIES/PDFFILES/USA_1988_Proclamation.pdf

The maritime limits and boundaries of the U.S., found in the A-16 National Geospatial Data Asset Portfolio, is recognized as the low-water line along the coast measured from the U.S. baseline. This is marked on 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 inter-agency U.S. Baseline Committee.The primary purpose of this data is to update the official depiction of these maritime limits and boundaries on the National Oceanic and Atmospheric Administration's nautical charts. The Office of Coast Survey depicts on its nautical charts the territorial sea (12 nautical miles), contiguous zone (24 nautical miles), and Exclusive Economic Zone (200 nautical miles, 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 and boundaries and to download data, see U.S. Maritime Limits & Boundaries. For the full Federal Geographic Data Committee metadata record, see Maritime Limits and Boundaries of United States of America.Thumbnail source image courtesy of: David Restivo

This dataset represents Exclusive Economic Zones (EEZ) of the world. Up to now, there was no global public domain cover available.
Therefore, the Flanders Marine Institute decided to develop its own database. The database includes two global GIS-layers: one contains polylines that represent the maritime boundaries of the world countries, the other one is a polygon layer representing the Exclusive Economic Zone of countries. The database also contains digital information about treaties. Please note that the EEZ shapefile also includes the internal waters of each country.

This is part of a series of 49 maps covering the whole of Australia and forms part of the International Map of the World map series.

At this scale 1 centimetre on the map represents 10 kilometres on the ground. Each map covers an area of six degrees of longitude and four degrees of latitude. The maps show roads, railways, hydrography, larger nature conservation reserves, outback homesteads. Seabed and land relief is shown by layer tints, spot heights and contours in metres. Contour interval is 500 metres, with an additional contour at 200 metres.

Product Specifications Coverage: Whole of Australia covered with 49 maps. National coverage first completed in 1975. Currency: Ranges from 1971 to 1983. Average 1976. Coordinates: Geographical. Datum: AGD66 (GDA94 compliant at this scale); AHD. Projection: Lambert Conformal Conic. Medium: Paper map, flat and folded. Status: These maps are no longer maintained. It is planned to produce a new series of maps from the converted 42 World Aeronautical Charts (WAC) series of maps produced in 2006. These maps are only available as a print on demand product.

This map can be purchased in either flat or folded format.

The FGGD inland water bodies map is a global raster datalayer with a resolution of 5 arc-minutes. It contains the value -997 where inland water bodies is present, the value 1 for the land. The information of inland water bodies is from the 1991 version of Digital Soil Map of the World.

Data revision: 2007-06-22

Supplemental Information:

This dataset is contained in Module 1 "Boundaries and topography" of Food Insecurity, Poverty and Environment Global GIS Database (FGGD) (FAO, 2007).

Contact points:

Metadata Contact: FAO-Data

Resource Contact: Mirella Salvatore

Data lineage:

The linework of the map is obtained by delineating drainage basin boundaries from an hydrologically corrected digital elevation model with a resolution of 1 * 1 km.

Resource constraints:

copyright

Online resources:

Inland water bodies (ESRI GRID Format - 215 Kb)

Online link to the Digital Soil Map of the World (FAO & UNESCO, 1991)

There are two types of boundary files: cartographic and digital. Cartographic boundary files portray the geographic areas using only the major land mass of Canada and its coastal islands. Digital boundary files portray the full extent of the geographic areas, including the coastal water area.

Marine protected areas (% of territorial waters) in Saint Maarten was reported at 8.6994 % in 2022, according to the World Bank collection of development indicators, compiled from officially recognized sources. Saint Maarten - Marine protected areas (% of total surface area) - actual values, historical data, forecasts and projections were sourced from the World Bank on March of 2025.

Ontario's recreational fishing regulations are based on 20 Fisheries Management Zones. This map outlines the "border waters area" in Zone 5. The layer and the resulting map were created by the Office of the Surveyor General of Ontario. This product requires the use of GIS software. *[GIS]: geographic information system

'''DEFINITION''' The temporal evolution of thermosteric sea level in an ocean layer (here: 0-700m) is obtained from an integration of temperature driven ocean density variations, which are subtracted from a reference climatology (here 1993-2014) to obtain the fluctuations from an average field. The annual mean thermosteric sea level of the year 2017 is substracted from a reference climatology (1993-2014) at each grid point to obtain a global map of thermosteric sea level anomalies in the year 2017, expressed in millimeters per year (mm/yr).

'''CONTEXT''' Most of the interannual variability and trends in regional sea level is caused by changes in steric sea level (Oppenheimer et al., 2019). At mid and low latitudes, the steric sea level signal is essentially due to temperature changes, i.e. the thermosteric effect (Stammer et al., 2013, Meyssignac et al., 2016). Salinity changes play only a local role. Regional trends of thermosteric sea level can be significantly larger compared to their globally averaged versions (Storto et al., 2018). Except for shallow shelf sea and high latitudes (> 60° latitude), regional thermosteric sea level variations are mostly related to ocean circulation changes, in particular in the tropics where the sea level variations and trends are the most intense over the last two decades.

'''CMEMS KEY FINDINGS''' Higher-than-average thermosteric sea level is reported over most areas of the global ocean and the European regional seas in 2018. In some areas – e.g. the western boundary current regions of the Pacific and Atlantic Ocean in both hemispheres reach values of more than 0.2 m. There are two areas of lower-than-average thermosteric sea level, which stand out from the generally higher-than-average conditions: the western tropical Pacific, and the subpolar North Atlantic. The latter is linked to the so called “North Atlantic cold event” which persists since a couple of years (Dubois et al., 2018). However, its signature has significantly reduced compared to preceding years.

The Maritime Zone Notification (M.Z.N. 143.2019.LOS) states that on 28 March 2019, Australia deposited with the Secretary -General, pursuant to article 16, paragraph 2, of the Convention, lists of geographical coordinates of points, concerning the baselines for measuring the breadth of the territorial sea, as contained in the Seas and Submerged Lands (Territorial Sea Baseline) Proclamation 2016.

The lists of geographical coordinates of points are referenced to the World Geodetic System (WGS 84)

https://www.un.org/depts/los/LEGISLATIONANDTREATIES/PDFFILES/mzn_s/MZN_143_2019%28RELEASED%29.pdf

https://www.un.org/depts/los/LEGISLATIONANDTREATIES/STATEFILES/AUS/Australia_TerritorialSeaBaseline2016.pdf