WebGL-based large-batch target loading and displaying method

Abstract

The invention discloses a large-scale target loading and displaying method based on WebGL. The method comprises the steps of map loading, target obtaining and processing, target forming, coordinate conversion, target loading, angle conversion and the like. According to the method, large-batch target loading and processing can be realized, and the method is very suitable for the current maritime page end and BS end application. The method comprises the following steps: loading a basic map of a nautical chart, receiving and analyzing AIS / radar target message data through a TCP message, and performing fusion processing on the received data to form a unified target; expanding the target coordinates according to the target length and width, forming frame coordinates to form primitives, and coloring to form a graphic target; and realizing the target re-rendering when the map range changes and target dynamic updating when the target dynamic data changes by binding the canvas through the map event. The target loading quantity and efficiency are greatly improved.

Description

technical field [0001] The invention relates to the field of VTS system data visualization, in particular to a method for loading and displaying large batches of objects based on WebGL. Background technique [0002] With the deepening and development of Vessel Traffic Management System (VTS, Vessel Traffic Management System) application, the web-based traffic management system was proposed and became the focus of VTS application. The traditional web-side ship traffic management system uses VML, SVG, etc. to load and display ship targets on the page. This method has a limited number of targets to load and display on the interface. When a large number of ship targets are drawn at the same time, the interface will freeze or even the process will die, which will seriously affect the user's use of the system. There is even a phenomenon that the ship target is not loaded and displayed on the map, and a "ghost" ship appears, which leads to insufficient supervision and VTS traffic ...

AI Technical Summary

Problems solved by technology

When a large number of ship targets are drawn at the same time, the interface will freeze or even the process will die, which will seriously affect the user's use of the system

There is even a phenomenon that the ship target is not loaded and displayed on the map, and a "ghost" ship appears, which leads to insufficient supervision and VTS traffic accidents

Images