Research And Application Of Spatial-temporal Data Model Of TGIS

Introduction of time bring greatly increased information to GIS and complexity to database management that made traditional GIS is competent enough. New Temporal GIS is demanded. Temporal GIS has also become the hot spot that people always studies with. The key question of the temporal GIS is to establishment appropriate time and the spatial union data model—Spatial-temporal Data Model. The data model can effectively organize, manage and consummate the temporal geography object attribute, the space and the time semantics, and then in order to reappears the historical condition, track change, and forecast future.According to temporal GIS and the space and time data model elementary theory, This article has improved and the expanded the base state amending model as the foundation, and has proposed an operated, highly effective space and time data model—Object-oriented Spatial-temporal Data Model based on Virtual base state. The base state amending model solves the space and time data memory problem, but the object-oriented data model solves the space and time data organization problem, and the two unions may effectively solve the space and time data memory and the organization. This part of content is the rationale of the research.And then, the independent development research—Lu Shun Tap-water information system, carries on the further confirmation to the theoretical model. From the demand analysis, overall structural design, database design and realization and system function realization unified the data model the application, it carries on the introduction. The system has used the module type method of exploitation, and took the ESRI Corporation's MapObjects as the backing, directly using the Shape document as well as the dbf table to take the data platform. It develops in the platform of Visual C++, and unifies MapObjects to hold to the Shape document data controls. The method can realize the chart level elementary operation, the data storage process, the historical data index, as well as the history data inquiry.The application result indicated that, it is usability for the base state amending object-oriented space and time data model to realize the design and the development of a small geographic information system.