搜索路网空间中时空相似轨迹

为了分析移动对象行为特征,需要一种度量轨迹间相似性的方法,虽然在欧氏空间检索移动对象相似轨迹的研究较多,但在路网空间这种研究还不多见。在实际应用方面,大多数移动对象位于路网空间而不是欧氏空间。本文研究了路网空间相似轨迹的特性,并提出了一种在路网空间搜索相似轨迹的度量方法。实验结果表明该方法不仅是搜索相似轨迹的实用技术,也是一种较好的轨迹聚类方法

Searching for Spatio-Temporal Similar Trajectories on Road Networks

In order to analyze the behavior of moving objects,a measure for determining the similarity of trajectories needs to be defined.Although research has been conducted that retrieved similar trajectories of moving objects in Euclidean space,vey little research has been conducted on moving objects in the space defined by road networks.In terms of real applications,most moving objects are located in road network space rather than in Euclidean space.In this paper,we investigate the properties of similar trajectories in road network space.And we propose a method to retrieve similar trajectories based on this observation and similarity measure between trajectories on road network space.Experimental results show that this method provides not only a practical method for searching for similar trajectories but also a clustering method for trajectories.