GPS数据时间跳变的修正方法  

Correction Method for GPS Data Time Jumps

作　　者：刘晓杰 LIU Xiaojie(Guangzhou Transports Research Institute Co.,Ltd,Guangzhou 510630,China)

机构地区：[1]广州市交通运输研究院有限公司,广州510630

出　　处：《交通与运输》2022年第4期43-46,共4页Traffic & Transportation

摘　　要：针对GPS数据时间跳变问题引起的行程时间、行程速度以及车辆运行状态变化识别等指标的计算错误,提出基于轨迹连线的时间跳变点修正方法。修正过程主要包括依据时间变量对GPS数据排序、跳变点识别并编号、跳变点修正以及修正效果评价。以西安市出租车GPS数据为例,进行验证。研究结果表明,经过该方法修正后,数据中跳变错误点的比例从原始的6.5%降至0.5%,车辆轨迹连线偏离度由7.0%降至1.3%,该方法修正效果好,有效提高了指标计算的准确性以及基于该指标研究的准确性,具有一定的借鉴意义。GPS time-location jump results in the estimation errors of transportation performance indicators,such as travel time,travel speed and vehicle status change recognition.Thus,a time-location jump correction method based on track connection was proposed.This method includes GPS data sorting according to time variable,the time-jump location identification and numbering,the time-location jump correction and correction efficiency evaluation.Taking the taxi GPS data of Xi'an as an example,the results show that the proportion of time-location jump error rate decreases from 6.5%to 0.5%and the deviation degree of vehicle track line decreases from 7%to 1.3%after the method is modified,which indicates that the method has a good correction effectively,improves the estimation of transportation performance indicators,and has a certain significance.

关 键 词：出租车GPS 大数据 时间跳变 异常值 轨迹连线 

分 类 号：U491[交通运输工程—交通运输规划与管理]