Figure 2 - uploaded by Leendert L. Dorst
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Simplified equiratio line with a ratio of 0.8 for small and 0.9 for medium size islands (top left); without small islands and 0.9 for medium size islands (top right); idem, 0.8 for medium size islands (bottom left); idem, 0.5 for medium size islands (bottom right).
Source publication
Maritime delimitation usually starts with the calculation of an equidistance line, which is often corrected for special circumstances. The correction process aims to produce a line that is “equitable”, a concept open to various interpretations. While the equidistance line is calculated by a technical expert, an equitable line is the result of a neg...
Contexts in source publication
Context 1
... us first try a ratio of 0.9 for the medium sized islands, and a ratio of 0.8 for the small islands. The results are shown in the top left map of Figure 2. Each turning point has shifted according to its dotted line. ...
Context 2
... it is possible to find out what happens if we change the ratios during the negotiation process. A ratio of 0.8 for the medium-sized island results in the bottom left map of Figure 2, and the extreme ratio of 0.5 in the bottom right map. From this last map, it is also clear that the application of a 0.5 ratio to a group of base points is a very different solution than assigning half effect to them. ...
Citations
The United Nations Convention on the Law of the Sea provides only basic legal principles for maritime delimitation disputes among coastal states. The implementation of maritime delimitation requires the comprehensive use of legal, political, and technical means by relevant states to generate the expected equitable results. Accurate calculation of the maritime delimitation boundary provides the basis for this equitable delimitation. Although the final determination of the maritime boundary is the result of diplomatic agreement, both disputing parties need a reasonable starting line as the point of departure for negotiations. As such, the equidistance/equiratio line can aid in this important task. The traditional three-point methods have many disadvantages, however, including a complex calculation process, dependence on map projections, and difficulty in calculating the equiratio line. Although the elastic method, water-line method, and mesh-points method can be used to calculate the equidistance/equiratio line, the boundary pattern is complex and the number of turning points is large. As a result, a great deal of adjustment and simplification is required, and simplifying the boundary line requires a complex diplomatic negotiation process. To solve these problems, we proposed a new three-point equidistance/equiratio method based on the Earth ellipsoid, which is called pendulum method. By choosing different geographical scenarios, we used the new method and CARIS to calculate the boundary and compared the demarcation results. The results demonstrated that the proposed method could generate an equidistance/equiratio line in various scenes using a unified algorithm. The algorithm was simple and efficient and was not limited by the map projection.
