The Automated Process Of Cadastral Updating Based On Updating Information

As the basic requirement of the development of cadastral database, cadastral updating means the database is updated when any cadastral entity changes. Currently a lot of time and labor are consumed in the implement of updating. And it is difficult to maintain the topological consistency. Therefore an automated process of cadastral updating is discussed based on updating information in this paper. Firstly the new cadstral objects is created from updating information. And then after the topological relationship computation, those objects touching, crossing or within the new object are updated.The concepts, theoris and methods of cadastral updating are summarized in the first part of this paper. The type of updating and spatio-temporal topological relationship between cadastral entities are presented in detail. In the second part different type of updating process are designed. The feasibility of updating process is proved in an experiment with practical data. The main works are listed as follows:(1) The spatio-temporal topological relationships for cadastral updating and tracing are analyzed.(2) An updating information file is designed for cadastral updating process.(3) Cadastral experimental database is constructed based on spatio -temporal model.(4) Cadastral automated updating process is described in each type of cadastral updating.(5) An experimental system is developed by visual studio 2003,ArcEngine, ArcSDE, Oracle9i and pratical data.The research indicates it is operational to automate or semi-automate the process of cadastral updating based on updating information and cadastral topological relationship.