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.