Research on Spatio-Temporal Data Organization and Snapshot Query Method in Base State with Amendments Model

The base state with amendments model is used widely as a spatiotemporal data model.In this paper,the characteristics of base state with amendments data model are analyzed,the shapefile is used as the base state file,and the delta-file designed independently is adopted to store and organize the changed data.Then the corresponding algorithm of snapshot query and the display method for the results of snapshot query are designed.In order to show the users with more intuitive and more abundant spatiotemporal information,this paper presents a double-screen and multi-view method to display the spatiotemporal information.Finally,a temporal GIS platform is developed using VC.NET,the algorithm and the display method presented in this pa-per are tested by using the main campus data of Central South University as experimental data.The experiment shows that the algorithm is correct,and the double-screen and multi-view dis-play method for snapshot query is a useful spatiotemporal data display method.It can provide the users with more intuitive,more rich and strong contrastive information.