Method for rapidly generating continental shelf external boundary line based on formula line and limit line

Abstract

The invention relates to a formula line and limit line-based continental shelf external boundary line rapid generation method. The method comprises the following steps: firstly, selecting parameters for generating an external boundary line from a three-dimensional topographic map, including a 200-sea-inside line, two formula lines and two limit lines, then carrying out topological calculation on the curves step by step, extracting intersection points of related curves, splitting the curves by the intersection points, connecting the curves conforming to an external boundary rule according to submarine topographic features, and finally obtaining the external boundary line of the submarine topographic map. And forming a final external boundary line. According to the method, related curves are displayed on the terrain in an overlapping manner, topological calculation is performed on the ellipsoid surface, the intersection point of every two curves is split and displayed on the topographic map in an overlapping manner, the curves meeting conditions can be visually and quickly selected and automatically and orderly connected, the generation process of the continental shelf external boundary line is simplified, and the generation efficiency is improved. The intersection relation and geographic information of related curves are visually reflected, and the method has a great practical value for correctly and rapidly generating the continental shelf external boundary line.

Description

technical field [0001] The invention belongs to the demarcation technology of the outer continental shelf, in particular to a method for quickly generating the outer boundary line of the continental shelf based on formula lines and limit lines. Background technique [0002] The width of the continental shelf is defined as the distance from the baseline for measuring the breadth of the territorial sea to the outer edge of the continental edge is less than 200 nautical miles, if it extends to a distance of 200 nautical miles, in any case where the distance from the baseline for measuring the breadth of the territorial sea exceeds 200 nautical miles Next, the coastal state shall delimit the outer edge of the continental shelf in one of the following two ways: one is to draw the boundary line based on the outermost fixed points, and the sediment thickness at each fixed point shall be at least the shortest distance from the point to the foot of the continental slope. 1% of the di...

AI Technical Summary

Problems solved by technology

[0010] It can be seen from the above technical process that the delineation of the outer limit of the continental shelf involves the 200 nautical mile line, two formula lines (60 nautical mile line extrapolated from the slope point and the 1% sediment thickness line) and two limit lines (350 nautical mile line and 1% sediment thickness line). 2500m water depth to extrapolate 100 nautical miles), and determine the topological relationship between them, the data relationship is complex, and the generation process is cumbersome

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