路网空间中GPS轨迹压缩的新方法
Journal of Beijing University of Posts and Telecommunications(2015)
Abstract
传统轨迹压缩算法要对每个具体轨迹进行建模与存储,未利用路网对轨迹的限制,故空间性能较差。针对该问题,首先对路网空间进行建模,继而探索个体轨迹的活动规律。提出基于轨迹的空间信息和轨迹的时态信息相结合的轨迹间投影距离度量( SRTD);提出基于SRTD距离相似轨迹双层压缩算法( SDTC),实验表明,SDTC算法相对于原始算法有效降低了存储空间开销;SDTC算法精度较原始算法有较大改进。
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Key words
trajectory compression,road network,Global positioning system trajectory,trajectory dis-tance
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