基态修正模型的时空数据组织和快照查询方法研究

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

基态修正模型是目前应用较广的一种时空数据模型。本文分析了基态修正模型中的时空数据特点,采用shapefile文件作为基态数据文件,自主设计差文件格式来存储和组织变化数据。在此基础上设计了快照查询的算法、流程和查询结果的显示方法。为了给用户提供更直观、更充分的时空信息,本文提出了一种双屏幕多视图的时空数据显示模式。采用VC.NET从底层开发了一个时态地理信息系统平台,并以中南大学主校区的时空数据为实验数据对上述算法和模式进行了检验。实验表明,本文所设计的算法可行,快照显示模式能够提供更直观、更丰富、对比性强的信息内容,是时空信息显示的一种可行模式。

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 doublescreen and muhi-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 paper 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 display method for snapshot query is a useful spatiotemporal data display method. It can provide the users with ,nore intuitive, more rich and strong contrastive information.