A event-based change detection method of cadastral database incremental updating

Event information reflects reasons for cadastral entities changes, and constitutes incremental information together with changing information. However, the existing change detection methods of incremental updating haven’t realized the event information detection so far. To address this issue, taking parcels as an example, a new change detection method including event semantics is proposed and used in cadastral database incremental updating. In the method, parcel event knowledge rule database is established through selecting the three factors inheritance relationship, topology relationship and attribute relationship as prerequisites. On the basis of detecting changing information, the event information is deduced by calculating different values of the above factors according to the established parcel event knowledge rules. A prototype system is designed and realized, and its experimental results show that the method can accurately deduce the changing information of parcels and their corresponding event information. In addition, the detection method also provides a solution for realizing the automation of cadastral database incremental updating.