移动对象时空方向关系建模

Spatio-temporal Direction Relation Modeling of Moving Objects

针对现有方向关系模型不能有效刻画移动对象方向关系变化的问题,提出了一种移动对象时空方向关系建模方法。通过对移动对象的时空方向关系进行分类,采用连续快照模型的思想,基于投影模型对移动点对象之间的时空方向关系进行建模,分别定义了静态时空方向关系模型、历史时空方向关系模型和时空方向关系演变模型。时空方向关系演变模型刻画了移动对象的动态时空方向特征,可以有效支持时空查询和时空推理等,对移动对象的时空特性研究具有重要的理论意义。

The existing direction relation models cannot represent the changes of direction relations between moving objects.Based on the classification of spatio-temporal direction relation,the static spatio-temporal direction relation model,history spatio-temporal direction relation and spatio-temporal direction relation evolution model have been defined respectively.The spatio-temporal direction relation evolution model,which depicts the dynamic characteristics of spatio-temporal direction,can support the spatio-temporal query and spatio-temporal reasoning effectively,and has theoretical meaning for the study of spatiotemporal characteristics of moving objects.