A ship trajectory restoration method based on vector interpolation

Abstract

The invention relates to a ship trajectory restoration method based on vector interpolation, and belongs to the technical field of graphs and visualization. The method comprises the following steps: S1, inputting dynamic information, coordinate information and time of starting and ending points of a missing track segment, setting the number of track points to be repaired, determining a time interval of the track points to be repaired, performing Gaussian projection conversion on latitude and longitude coordinates of the starting and ending points, and converting a speed unit of the starting and ending points; S2, adopting a bidirectional iteration mode, and obtaining the dynamic information of the two sets of track points to be repaired according to the dynamic information of the startingpoint and the ending point, and on the basis, using the dynamic information of the starting point and the ending point and Gaussian plane coordinates to obtain two sets of coordinate predicted values;And S3, carrying out weighted average on the two groups of coordinate predicted values according to the weight, and carrying out Gaussian back projection calculation to obtain a final latitude and longitude coordinate of the to-be-repaired track point. According to the method, the ship track repair accuracy of curvilinear motion can be improved, and the algorithm operation time is correspondinglyshortened.

Description

technical field [0001] The invention belongs to the technical field of graphics and visualization, and relates to a ship trajectory repair method based on vector interpolation. Background technique [0002] The ship's voyage track is a record sequence of the ship's position and time, and the ship track data is usually provided by AIS (Automatic Identification System). With the development of maritime navigation, a large number of AIS devices have been installed on ships and shore bases, and a shore-based ship dynamic data exchange network has been established to receive and record the movement information broadcast by ships sailing along the coast around the clock, forming a regional and even global network. The ship trajectory database. Trajectory analysis is based on a complete trajectory, but due to various subjective and objective reasons such as improper AIS operation, artificial shutdown of AIS equipment, abnormal operation of AIS equipment itself, or congestion of in...

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a ship trajectory repair method based on vector interpolation, which solves the problem of rough repair results for curved ship tracks in existing ship track repair methods, low accuracy of track repair, or To ensure the accuracy of trajectory repair, it is necessary to increase the running time of the algorithm

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