Design and construction of spatial database for internal elements of urban based on TGIS

In recent years, during the construction of “digital urban”, urban geography research has also undergone tremendous changes, especially in the research of urban internal elements revolution. Meanwhile, computer technology, GIS, spatial information science and such technical applications have made this kind of research more effective, intelligent and precise; they also have provided the foundation for information mining with consideration of time factor. Urban internal elements have certain geometric features which involve massive spatial information and updating information. In view of this, construction of spatial database is basic work for digital urban construction. However, traditional spatial database targets less about historical characteristics, and spatio-temporal database costs too much time and vigor for construction. In order to solve these problems, this study, based on spatial-temporal GIS models, concentrated on the needs of urban geographic research under environment of digital urban, utilized object-oriented method to design spatial database and finally established the database and realized functions based on ArcSDE and Oracle. Results showed that this database can well satisfy the demands of urban geographic research, and it could be applied in many fields through function extension. Altogether, the system is more management-oriented, scalable and efficient; it is more convenient for data updating and information sharing.