Method for extracting territorial sea baseline based on natural coastline data

Abstract

A method for extracting a territorial sea baseline based on natural coastline data mainly comprises a natural coastline thinning method based on an improved Douglas-Peucker algorithm and a territorial sea baseline encryption algorithm based on earth spherop geodesic line resolving, and territorial area baseline delimitation is conducted. According to the method for extracting the territorial sea baseline based on the natural coastline data, in the thinning process, natural coastline salient points which have a larger influence on a sea area are extracted and taken as segment points, then two adjacent segment points are taken as a first point and a tail point for data thinning, an optimal distance threshold is selected through a fitting curve based on a least square method, thinning is conducted segment by segment, and the natural maritime rights and interests can be guaranteed under the circumstance that higher precision and compression ratio are guaranteed. The encryption algorithm is based on the earth spherop geodesic line resolving on the ground, a geodesic line is fitted between adjacent territorial sea base points, and therefore encryption calculation is conducted on adjacent base points by using a geodetic theme resolving principle. Improvement is conducted on distance judgment conditions and encryption point positions in the calculation process, the calculation rate is increased, and the position distribution of the territorial sea base points is more reasonable.

Description

technical field [0001] The present invention relates to a method for determining territorial sea base points and defining territorial sea baselines, specifically, to a method of thinning natural coastlines and encrypting territorial sea base points to generate territorial sea baselines, providing assistance for demarcating sea areas and effectively safeguarding my country's marine rights and interests. Technical Support. Background technique [0002] The 21st century is the century of the ocean. The ocean contains rich resources such as oil and gas, fishery, and minerals. While promoting the rapid development of the national economy, it has also become the focus of competition among countries. Significant. The determination of territorial sea base points and the delineation of territorial sea baselines have long-term strategic significance and great practical significance for safeguarding my country's maritime rights and interests, consolidating coastal defense construction,...

AI Technical Summary

Problems solved by technology

[0006] Although the thinning effect of the Douglas-Pocke algorithm is better than that of other algorithms, there are still some defects: some important feature points may be discarded; self-intersection is prone to occur when the line type is complex or the threshold is large; The common boundary compression of linear targets is inconsistent; topological inconsistency leads to terrain distortion, etc.

[0007] The baseline of the territorial sea is known, and the distance between adjacent points is too far away, which will affect the calculation accuracy and accurate drawing

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