![]() ![]() Unfortunately, in this step also enclaves and semi-enclaves were considered holes and thus deleted from the territory of the surrounding state. These were filled using the Delete Holes tool from QGIS 3.10 setting a minimum area threshold of 0.1. The resulting polygons had several gaps due to small differences between the coastlines of the EEZ and the World Countries 2014 datasets. In these cases, the baselines were further densified. While the distance between points mentioned above was sufficient to grant equal weight to both coasts involved, this was not the case for international border estuaries and rivers, or in cases where the distance between coastal states was smaller than the maximum distance between points along the baselines. In order to obtain regularly spaced points along the coast, both baselines were densified so that the maximum distance between points was reduced to 0.01 Degrees. The millions of Thiessen polygons generated are then merged and dissolved by attribute, in this case the Country name, exposing the median lines between countries. This was achieved by drawing Thiessen polygons rooted on points along both the straight and normal baselines. Unless borders at sea were defined by a treaty or agreement between coastal states, the boundary between nations was calculated by Marine Regions and defined as the Median Line – or the line connecting points which are located at equal distance from both coastal states. ![]() Specific cases where coastal features were not contemplated for the drawing of EEZ include, among others, the Rockall rock off the west coast of Scotland and the Alijos rocks off Baja California. This product will be called ‘World Countries 2014’ in this methodology page.įollowing the UNCLOS distinction between Islands and Rocks – PART VIII REGIME OF ISLANDS - coastlines were created with the appropriate features for the drawing of EEZ, and another one for the drawing of TS, and CZ. ![]() Several other fixes were made to the coastline to ensure that the coastline could be used as an appropriate normal baseline for the drawing of the multiple Maritime Boundaries areas. The coastline was extracted from the ESRI Countries 2014 and then combined with reefs data extracted from Coral Reef Distribution UNEP for the countries where reefs were fundamental for the correct calculation of the maritime areas, as intended by the coastal state. The ESRI Countries 2014 was the primary source for the Maritime Boundaries v11 baseline. In addition to this main source, others were also used to complete the straight baselines database such as national legislation on maritime delimitations, agreements, treaties, USA Department of State, among others. The source for the straight baselines was primarily the United Nations repository of all the claims from UNCLOS’s signatories: DOALOS. In the Maritime Boundaries dataset, the baselines used were a combination of a coastline as a proxy for the low-water line (the normal baseline described in UNCLOS) and straight or archipelagic baselines. The maritime boundaries and areas are calculated from the baselines. This is a deviation from the UNCLOS EEZ definition. Please note that for the delineation of our EEZ, we include the archipelagic waters, internal waters and territorial seas of each country. These areas are Exclusive Economic Zones (EEZ), Territorial Seas (TS), Contiguous Zones (CZ), Internal Waters (IW), Archipelagic Waters (AW), High Seas (HS) and Extended Continental Shelves (ECS). In this new release, Marine Regions makes available all areas included in the provisions of the United Nations Convention on the Law of the Sea (UNCLOS). This version builds further on what was made in earlier versions, includes new treaties and corrected inconsistensies. The Maritime Boundaries version 11 are now available on the Marine Regions website. Union of world country boundaries and Exclusive Economic Zones (EEZs)ĭata collection and boundaries calculations.Data collection and boundaries calculations. ![]()
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