A Surveying and Mapping Method for Initial Back-arc Basin Continental Shelf Delineation

Abstract

The invention discloses a surveying and mapping method for initial back-arc basin continental shelf delimitation. The surveying and mapping method comprises the following steps: (1) surveying and mapping high-precision data of a description region; (2) constructing a seabed multi-dimensional digital model of the description region; (3) constructing a core region of an axial description; (4) identifying the deepest point in an axial region to form a basin deepest line; and (5) comprehensively judging the middle axis point of a section through characteristics of V-shaped and W-shaped sections and the like to form a basin middle axis. According to the surveying and mapping method for the initial back-arc basin continental shelf delimitation, the problem that the outer boundary of an active continental margin under complicated geology and geographic and geomorphic conditions is difficult to quantify and define is effectively solved; a technical method, in which the deepest point in the axial region is taken as a continental shelf outer boundary point and the middle axis point is taken as study and judgment reference, is provided. The surveying and mapping method for the initial back-arc basin continental shelf delimitation has very important actual application values in marine delimitation of a special region, marine surveying and mapping, marine information systems, computer graphics and submarine geomorphic researches.

Description

technical field

[0001] The invention relates to the technical fields of marine delimitation, marine surveying and mapping, seabed topography and landform mapping, marine geographic information system, computer graphics and seabed science. Background technique

[0002] Article 76 of the Convention on the Law of the Sea, which came into effect in 1982, stipulates: “The continental shelf of a coastal state includes the seabed and subsoil of the seabed area that extends beyond its territorial sea to the seabed area on the outer edge of the continent in accordance with the entire natural extension of its land territory. If the distance measured from the baseline for measuring the breadth of the territorial sea to the outer edge of the continent is less than 200 nautical miles, the distance shall be extended to 200 nautical miles”; if the coastal state claims to exceed 200 nautical miles from the baseline for measuring the breadth of the territorial sea, then The outer limit of th...

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