By analyzing the respective characters of field-based method and object-based method of spatial objects, considering the relationshi Pof space-correlated attributes and the spatial character of geographical entities, a Geographical Event-based Spatiotemporal Data Model （ GESTDM ） was proposed in the paper. In the model, explicit geographical event and implicit geographical event were considered. Changes based on field （ space-correlated attributes ） were considered as explicit events, which are the ＇ causes＇ of change, describing part spa...
