基于TGIS的地质灾害时空数据库研究

Spatio-temporal Database of Geo-hazards Based on TGIS

传统地质灾害数据库通常为静态数据库,不能记录灾害连续动态变化的信息,而时态GIS是解决该问题的方法。提出了基于事件的动态多级基态修正模型(DMBSAE),并基于DMBSAE模型和地质灾害时空过程概念模型,设计和构建了地质灾害时空数据库,并讨论了四库结构、时空数据组织的基本思路、数据库均衡化、时空数据在对象关系型数据库中的存储机制、历史状态再现、灾害体历史变化沿革回溯等关键问题。开发了地质灾害时态GIS系统(GH-TGIS),在地质灾害概率预测、地质灾害动态管理以及地质灾害演化对比分析等方面进行了应用。实践表明,DMBSAE模型能有效和便捷地存储、组织和管理海量地质灾害时空数据,具有较好的实际应用价值。

Traditional geo-hazards database is usually a static database and cannot record the dynamic change information for geo-hazards.This paper points out that temporal GIS is the solution and presents the multilevel base state with amendments data model based on events（DMBSAE）.It designs and builds the spatio-temporal database for geo-hazards based on DMBSAE model and conceptual model for spatio-temporal process,and discusses the key issues such as the four-database structure,the basic idea of patio-temporal data organizations,database equalization,the storage mechanism of spatio-temporal data in the object-relational database,the history state recovering,and the tracing for hazard object＇s change.The developed the temporal GIS system（GH-TGIS） of geo-hazards has already been applied in early warning and forecast for geo-hazards,dynamic management of geo-hazards and comparative analysis of geo-hazards.The successful application states that DMBSAE model is of practical value for it can store and manage massive spatio-temporal data efficiently and conveniently.