A cadastral spatial data storage structure based on relational database

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This paper presents a cadastral spatial data storage structure based on relational database, the method and the procedure to realize it. The paper consists of three parts. In the first part, some existing problems in some developed cadastral management systems are discussed. These problems are the following four. 1) The security of cadastral spatial data is difficult to be assured. 2) It is difficult to varify cadastral data and the integrality of cadastral data is difficult to be kept. 3) To transmit and share cadastral data is difficult. 4) The efficiency of data access is low. In the second part, the feasibility of using relational database to store spatial data is analyzed and a new cadastral spatial data storage structure is presented. At the same time, the related table structures and field descriptions are given, and then the merits and demerits of this storage structure are analyzed in detail. In the last part, through a real example, the detailed methods to make the new storage structure a reality are given. Moreover, some involving key techniques of the new storage structure are discussed. These techniques are: 1) the application of database transaction, 2) the application of database trigger, 3) and the application of secure recovery of database.