Truck GPS trajectory data compression method

A technology of trajectory data and compression method, which is applied in the direction of database indexing, structured data retrieval, electronic digital data processing, etc., can solve the problems of unreasonable data mining or sending, cumbersome data mining, and increased storage costs, and achieve concise trajectory data Integrity, data reduction, high compression efficiency effect

Active Publication Date: 2020-04-21
SOUTHWEST JIAOTONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is very unreasonable to directly carry out data mining or send these huge data to the server
Because directly storing these huge raw data will not only lead to an increase in storage costs, but also make the later data mining very cumbersome

Method used

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  • Truck GPS trajectory data compression method
  • Truck GPS trajectory data compression method
  • Truck GPS trajectory data compression method

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Embodiment Construction

[0038] The technical solution of the present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments:

[0039] Such as figure 1 As shown, the embodiment of the present invention provides a method for compressing truck GPS track data. This embodiment is based on the GPS track data of trucks in March 2019 obtained by the Sichuan Provincial Expressway Traffic Supervision Platform to perform a track data compression test. The steps of the processing technology as follows:

[0040] Step 1: Based on the GPS track data of trucks in March 2019 obtained from the Sichuan Expressway Traffic Supervision Platform, it contains a total of 679,849 pieces of GPS track data. Each track data records the truck number, license plate number, recording time, latitude and longitude coordinates, direction, Driving instant speed and speed limit. Carry out data cleaning on the truck GPS trajectory data, that is, data screening;

[0041] St...

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Abstract

The invention relates to a truck GPS trajectory data compression method, which comprises the following steps: based on truck GPS trajectory data, cleaning the data, i.e., screening the data, so as toremove repeated and invalid data; based on the cleaned truck GPS data, judging a stay point in the truck GPS track data through a predefined speed threshold value and a predefined time threshold value; and compressing the cleaned GPS trajectory data by using a trajectory compression method based on the judged parking point data, truck GPS trajectory data and road network data, and finally storingthe compressed GPS trajectory data as a local Excel file. Through the technical scheme of the invention, the compression rate of the GPS track data of the truck is greatly improved, the processing track is simpler and more complete, the waste of redundant information on storage resources is greatly reduced, and the uploading is quicker.

Description

technical field [0001] The invention relates to the technical field of trajectory compression, in particular to a method for compressing GPS trajectory data of trucks. Background technique [0002] With the popularity of GPS devices, the data volume of user trajectories is growing explosively, and the daily trajectory data volume of a city often reaches TB level or even PB level. It is very unreasonable to directly carry out data mining or send these huge data to the server. Because directly storing these huge raw data will not only lead to an increase in storage costs, but also make the later data mining very cumbersome. Therefore, it is very necessary to compress and store the original trajectory data, which not only reduces the storage space, but also simplifies the trajectory and facilitates the processing of the trajectory data in the later stage. [0003] "Track compression technology" was first introduced from cartography and computer cartography, and its original p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/22G06F16/215G06F16/29
CPCG06F16/215G06F16/22G06F16/29
Inventor 李国旗陈罡卫龙吕卓石孙文杰段礼豪董辉魏新
Owner SOUTHWEST JIAOTONG UNIV
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