摘要
提出了基于移动对象运动轨迹的时空立方体模型,在该模型中,移动对象的运动轨迹按一定时间间隔划分,每段运动轨迹对应一个最小外接时空长方体,它是存储、访问的一个基本单位。基于该模型设计了相应的时空索引和时空查询算法。验证表明,模型在减少数据冗余和时空查询性能方面有较大提高。
： A new spatial-temporal data model based on space-time cube is presented, where trajectories of moving objects are split into segments, each segment has a bounding cuboid. The trajectory segment is a basic unit for storage, and the bounding cuboid is built on the segment for indexing. The experiment shows that redundancy of data is reduced and performance of spatial-temporal query is improved.
出处
《计算机工程与设计》
CSCD
北大核心
2007年第22期5338-5340,5481,共4页
Computer Engineering and Design
关键词
移动对象数据库
时空立方体
时空索引
时空数据查询
时空数据模型
moving objects database
space-time cube
spatial-temporal index
spatial-temporal query
spatial-temporal model
