VTS system radar return video display method based on geographic coordinate system

Abstract

The invention discloses a VTS system radar return video display method based on a geographic coordinate system. The VTS system radar return video display method comprises the following steps: S1, the program of a VTS system is divided into two threads, wherein the thread I is responsible for receiving and caching a radar return message; S2, the thread II responds to electronic map indication range variation to generate a new to-be-overlapped radar return video map layer; S3, the generated radar return video map layer is overlapped on the current electronic map. With adoption of the VTS system radar return video display method, the radar return video display problem of a ship traffic management system, particularly to a system with the data format of the electronic map measured by the geographic coordinate system, is solved, and under the condition that the system overhead is acceptable, the VTS system radar return video display method ensures the position consistency of a radar return video and a ship target on the electronic map, is particularly suitable for the ship traffic management system, and is generally used for a single port, an offshore area and an inland river with smaller geographic display ranges, as well as a system allowing certain deformation of map projection.

Description

technical field [0001] The invention belongs to a computer radar echo video display method, in particular to a radar echo video display method based on a geographic coordinate system electronic map applied to a VTS ship traffic management system. Background technique [0002] In the vessel traffic management system (VTS system), there are several types of ship discovery methods, such as radar discovery and AIS reporting, among which radar discovery is one of the most important sources of real-time intelligence. The radar station filters the original video of the received radar echo through clutter to remove clutter such as waves and floating objects on the sea surface, and then forms a detection video measured in polar coordinates and sends it to the control center. After the control center receives the radar echo message, it will be superimposed and displayed on the electronic map. [0003] The electronic map is a map that the information system displays the map data set o...

AI Technical Summary

Problems solved by technology

For the data stored in the geographic coordinate system, the Mercator projection will greatly increase the system overhead when rendering the map. The best way is to project directly by latitude and longitude, but this method will cause some deformation of the map , direct linear scaling and stacking of radar echoes will cause the radar echoes to not match the target

Therefore, existing radar echo display methods cannot be used for map datasets stored in geographic coordinates

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