一种基于过程的动态时空数据模型

 通过对土地利用时空对象变更的考察，指出纯粹以事件或事件序列方式构建的时空数据模型在时空要素关联和事件因果关系表达上存在的不足，提出以过程为核心的时空数据模型PBSTDM。该模型能反映时空对象的演变过程，以及在这个过程中产生的事件因果联系。给出了该模型的数据组织体系，以及基于此模型在土地利用更新调查中的应用系统实例，表明该模型能减少数据访问的复杂度，提高时空数据处理的效率。

A Process-Based Dynamic Spatio-Temperal Data Model

An inspection of the change of landuse features was performed to evaluate the deficiencies of the spatio temperal data models based on event or sequence of events. It is difficult to describe the relations of spatio temperal objects and causal relationships of events with these models. A Process Based Spatio Temperal Data Model (PBSTDM) is established to satisfy this demand. The model can retain the evolution characteristics of spatio temporal objects and reflect the cause and effect events involved in the process. An organization frame work of PBSTDM and a land use change management system LandEx are worked out.It is proved that PBSTDM can facilitate the data access and advance the efficiency of spatio temporal data processing.