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Track simplified method and system and track visualization system

A technology that simplifies the system and trajectories, applied in the direction of navigation calculation tools, etc., can solve the problems that the trajectories of massive floating cars are difficult to handle, cannot meet the real-time monitoring and management of floating car trajectories, and cannot realize the dynamic visualization and real-time update of floating car trajectories. Effects of real-time visualization, improved simplification efficiency, and improved trajectory loading speed

Active Publication Date: 2019-04-12
武汉思众空间信息科技有限公司 +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitations of computer memory and algorithm efficiency, dynamic visualization and real-time update of floating car trajectories cannot be realized. Generally, only historical trajectories within a period of time can be visualized, but it is difficult to deal with massive floating car trajectories updated in real time, which cannot meet the needs of floating vehicles. The demand for real-time monitoring and management of vehicle trajectories

Method used

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  • Track simplified method and system and track visualization system
  • Track simplified method and system and track visualization system
  • Track simplified method and system and track visualization system

Examples

Experimental program
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Effect test

Embodiment 1

[0033] like figure 1 As shown, it is a flow chart of a trajectory simplification method provided by an embodiment of the present invention, consisting of figure 1 It can be seen that the trajectory simplification method includes the following steps:

[0034] Step S102: Obtain trajectory data to be simplified.

[0035] Trajectory data is the data information obtained by sampling the motion process of one or more moving objects in the space-time environment, including the position of sampling points, sampling time, speed, etc. The data information of these sampling points constitutes trajectory data according to the order of sampling.

[0036] Here, the trajectory data may be traffic trajectory data, animal migration data, climate airflow data, personnel movement data, and the like. For example, for a smart phone with a positioning function, the trajectory data reflects the mobile phone holder's action status for a certain period of time. The mobile Internet network can locate...

Embodiment 2

[0069] Based on the trajectory simplification method in the first embodiment above, this embodiment provides a trajectory visualization method. Taking a floating car as an example, the following describes in detail how the trajectory visualization method is applied to a floating vehicle.

[0070] Step 1, while opening the track data file of the floating car, obtain the remaining memory capacity of the system, and determine whether to persist the track pyramid data with low access rate in the memory database according to the capacity, so as to release the memory.

[0071] Here, the trajectory pyramid is multi-level simplified trajectory data.

[0072] In one of the implementation manners, when there is a lot of simplified trajectory data and the memory consumption space reaches a set threshold, the trajectory pyramid created earlier and with fewer access times can be persisted to disk to free up memory space. Here, after the process is closed, the trace pyramid in the memory da...

Embodiment 3

[0094] The embodiment of the present invention also provides a trajectory simplification system, see image 3 , is the structural diagram of the system, by image 3 It can be seen that the system includes a trajectory data acquisition module 31, a geometric feature weight calculation module 32, a comprehensive feature weight calculation module 33 and a comparison and simplification module 34 connected in sequence, wherein the functions of each module are as follows:

[0095] Trajectory data acquisition module 31, for obtaining the trajectory data to be simplified;

[0096] The geometric feature weight calculation module 32 is used to calculate the geometric feature weight of each track point in the track data; the geometric feature weight is the triangle to be calculated and two track points adjacent to the track point to be calculated area;

[0097] The integrated feature weight calculation module 33 is used to calculate the integrated feature weight of each track point acc...

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Abstract

The invention provides a track simplified method and system and a track visualization system, and relates to the field of map making comprehensive technology. The track simplified method comprises thestep that data of tracks to be simplified is obtained; geometrical feature weight of each track point in the track data is calculated; the geometrical feature weight is the area of a triangle formedby the track points to be calculated and the two track points adjacent to front and back of the track points to be calculated; the comprehensive feature weight of the track points is calculated according to the geometrical feature weight of the track points and instantaneous speed of the track points; the comprehensive feature weight is a specific value of the geometrical feature weight and the instantaneous speed; and the size of the comprehensive feature weight of the track points and a preset weight threshold value is compared, and the track point of which comprehensive feature weight lessthan the preset weight threshold value is deleted to obtain the simplified track data. According to the track simplified method and system and the track visualization system, track information loss after track data simplified can be reduced, the simplified efficiency is improved, and real-time visualization of the tracks is realized.

Description

technical field [0001] The invention relates to the technical field of cartography synthesis, in particular to a trajectory simplification method, system and trajectory visualization system. Background technique [0002] In recent years, with the widespread application of embedded navigation and positioning equipment for navigation and track recording of floating vehicles, track data is becoming ubiquitous, and the acquisition of moving object tracks is one of the important means of modern management and monitoring. [0003] At present, the existing floating car trajectory management system is still a difficult problem for the visualization of massive floating car trajectories. Due to the limitations of computer memory and algorithm efficiency, dynamic visualization and real-time update of floating car trajectories cannot be realized. Generally, only historical trajectories within a period of time can be visualized, but it is difficult to deal with massive floating car traje...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/20
CPCG01C21/20
Inventor 周东波杜志强罗均胡伟
Owner 武汉思众空间信息科技有限公司
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