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Method for generating extrapolation boundary of continental shelf 200 nautical miles away

A continental shelf, boundary technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as insufficient support for the generation of FOS delimitation boundaries

Inactive Publication Date: 2013-02-20
SECOND INST OF OCEANOGRAPHY MNR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] According to the analysis of public information retrieved, there is currently no mature technical method in China for the generation of demarcation lines such as the FOS+60M line, 350M line, and 2500m+100M line on the continental shelf beyond 200 nautical miles, although there are a few documents on the demarcation of the continental shelf beyond 200 nautical miles. It has been introduced, but there is no detailed content of the boundary generation method, and the existing technical methods are not enough to support the generation of demarcation boundaries such as FOS+60M line, 350M line and 2500m+100M line

Method used

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  • Method for generating extrapolation boundary of continental shelf 200 nautical miles away
  • Method for generating extrapolation boundary of continental shelf 200 nautical miles away
  • Method for generating extrapolation boundary of continental shelf 200 nautical miles away

Examples

Experimental program
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Effect test

Embodiment 1

[0047] like figure 1 The flow shown:

[0048] (1) Input variables. The initial variables are input from the outside: the starting point G of the extrapolation arc, the radius r of the extrapolation and the direction D of the extrapolation. The starting point of the extrapolation arc is also the coordinate point of the center of the extrapolation arc, which is given by the user, and the series of fixed points form the initial data set G={g i (x i ,y i )}. The extrapolation radius is determined by the type of extrapolation arc. The extrapolation radius r of FOS+60M line, 350M line and 2500m+100M line is 60 nautical miles, 350 nautical miles and 100 nautical miles respectively. The extrapolation direction D is the extension direction of the extrapolation arc, and the FOS+60M line, 350M line and 2500m+100M line are all extrapolated towards the sea.

[0049] (2) Generate an extrapolated arc.

[0050] According to the initial fixed-point set G={g i (x i ,y i )}, with (x i...

Embodiment 2

[0078] Figure 2 to Figure 7 shows the point from a given continental slope foot (G 1 ~G 4 ) The process of generating FOS+60M lines:

[0079] (1) Input variables. The initial variables are input from the outside: the starting point G of the extrapolation arc, the radius r of the extrapolation and the direction D of the extrapolation. Initial data set G={g i (x i ,y i )}, the extrapolation radius r=60 nautical miles, and the extrapolation direction is due east.

[0080] Such as figure 2 shown.

[0081] (2) Generate extrapolated arcs.

[0082] According to the initial data set G={g i (x i ,y i )}, with g i (x i ,y i ) point as the center of the circle, with 60 nautical miles as the radius r, to generate spherical extrapolation arc a i . Traverse the initial data set G={g i (x i ,y i )}, forming the data set Arc 0 ={a i}, each extrapolated arc a i Including the coordinates of the center of the circle (x i ,y i ) and the extrapolated radius value r.

[...

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Abstract

The invention discloses a method for generating an extrapolation boundary of a continental shelf which is 200 nautical miles away and in particular relates to a method for generating a boundary of a continental shelf in the mode that based on a known fixed point, a certain distance is extrapolated outwards in a specific direction. The method comprises the following steps of: generating extrapolation arcs; intersecting the extrapolation arcs; cutting the extrapolation arcs; deleting internal arcs; and deleting surplus arcs, combining the extrapolation arcs and the like so as to realize the automatic generation of a line of FOS (factor of safety)+60M, a line of 350M and a line of 2500m+100M. The method has the advantages of accuracy in surveying and mapping data, convenience in operation, small influence of natural weather and the like in the process of coastal surveying and mapping and maritime delimitation in China.

Description

technical field [0001] The present invention relates to a method for generating the boundary of the continental shelf beyond 200 nautical miles, specifically refers to a method based on known fixed points, extrapolating a certain distance in a specific direction, so as to generate FOS+60M line, 350M line and 2500m+100M line and other continental shelf delimitation beyond 200 nautical miles The necessary technical methods involve the fields of computer graphics, seabed science and ocean delimitation. Background technique [0002] According to the "Convention on the Law of the Sea" signed and entered into force in 1982, "the continental shelf of a coastal state includes the entire natural extension of its land territory beyond its territorial sea, and extends to the seabed and subsoil of the seabed area on the outer edge of the continent. If the width of the territorial sea is measured from If the distance from the baseline measured to the outer edge of the continental edge is...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 吴自银李家彪方银霞黎明碧李守军尚继宏
Owner SECOND INST OF OCEANOGRAPHY MNR
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