High-efficiency trace replay method and system based on electronic map

A trajectory playback and electronic map technology, which is applied in the traffic control system of road vehicles, traffic control systems, instruments, etc., can solve the problems of low accuracy and large amount of calculation, and achieve the effect of small amount of calculation and high precision

Active Publication Date: 2014-01-08
SHENZHEN HONGDIAN TECH CORP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a method for high-efficiency trajectory playback based on electronic maps, aiming to solve the problems of large amount of calculation and low accuracy in the prior art

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  • High-efficiency trace replay method and system based on electronic map
  • High-efficiency trace replay method and system based on electronic map
  • High-efficiency trace replay method and system based on electronic map

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Embodiment 1

[0043] This embodiment provides a method for high-efficiency trajectory playback based on electronic maps. The specific technical scenario of this embodiment can be: there are 10 original trajectory points in this embodiment, which are recorded as: Pt1...Pt10, the original trajectory points The location relationship diagram is as follows image 3 shown, where image 3 The square box represents the size of the current display window of the electronic map of the vehicle monitoring system, the method is as follows figure 2 shown, including the following steps:

[0044] 201. Determine the original track point data that needs to be processed by the track playback function;

[0045] 202. Obtain the range and scale of the current display window;

[0046] It should be noted that the track playback function uses track points to simulate the track line of the vehicle and superimposes it on the electronic map for visual display. When the user moves or zooms the map window to view th...

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Abstract

The invention is applicable to the field of vehicle-mounted monitoring techniques and provides a high-efficiency trace replay method and a high-efficiency trace replay system based on an electronic map. The method comprises the steps of determining data of original trace points required to be processed through a trace replay function; obtaining a current display window of the electronic map and a scale of the current display window; reserving the original trace points in the current display window as a data set; calculating an angle formed by three continuous points in the original trace points in the data set; judging whether the angle is larger than or equal to an angle threshold corresponding to the scale; if the angle is larger than the angle threshold corresponding to the scale, thinning the data of a middle point of the continuous three points corresponding to the angle; drawing a movement trace for replay by using the original trace points remained after thinning. The technical scheme provided by the invention has the advantages of small calculation amount and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of vehicle monitoring, and in particular relates to a method and system for high-efficiency track playback based on electronic maps. Background technique [0002] With the development of network technology, the B / S architecture model is more and more favored by most users. The vehicle monitoring system is also gradually replaced by the traditional C / S architecture model by the B / S architecture model. Usually, the user performs real-time monitoring, track playback and information query on the vehicle's geographical location, speed, driving direction, vehicle status and other information on the electronic map through the browser. The track playback function is an important function of the vehicle monitoring system. Through The trajectory points are used to simulate the trajectory of the vehicle and superimposed on the electronic map for visual display, providing an intuitive visual information support for veh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/123
Inventor 钟静鹿曼徐顺智
Owner SHENZHEN HONGDIAN TECH CORP
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