抄録
The modelling of geometric and image-based data is a main aspect of spatial data handling in GIS. And the modelling of time is also very important to consider history and prediction of the real world. Frist, this paper introduces a topological model for spatial objects, applying SDTS(Spatial Data Transfer Specification) and an object oriented approach.
Next, the structure of temporal object types is discussed, which consists of three parts. The first is the life period of objects. The second is pointer sequence to show previous objects. The third is pointer sequence to show objects occured from this object. This model can describe occurrence, change, and extinction of entities.
Finally, the spatio-temporal object type is derived from spatial and temporal object types.
