期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2002
卷号：XXXIV Part 2
页码：619-626
出版社：Copernicus Publications
摘要：Incremental updating of a Spatio-Temporal Data Base (STDB) means that master spatial data set is updated when any change (geometric or thematic) occurs, the changes can be recorded, updated and provided successively to users. During this process, a set of editing operations is needed to add, delete or amend spatial objects. As traditional manual operations are labor-intensive and even error–prone, it is necessary to develop a method to automate or semi- automate these editing operations. This requires the automatic identification of spatial changes, trigging appropriate editing operations, solving problems of spatial conflicts and checking the consistency of the records. Since the spatial changes are caused by the external events taking place in the geographic world and editing operations are caused by the spatial changes, the editing operations may be directly triggered by the external events. Based on this cognition, a new approach of STDB's automatic incremental updating is proposed. This approach is named as Event-Driven Incremental Updating (E-DIU). The method of E-DIU is based on the relationship among the external events, spatial changes and the internal database operations, the spatial change types of the objects involved in the event are identified by the external event and the topological relationship between the objects before and after the event. The database updating operations are determined by the spatial change types. So the authors analysed the relationship among the external events, spatial changes and the internal database operations at first, then designed a total architecture of E-DIU implementation and described the process of the E-DIU of the master STDB in this paper. An example is given to illustrate this approach in the end of this paper
