青藏铁路信息系统数据库设计

Design of the Qinghai-Tibetan Railway Information System

建立青藏铁路沿线地理信息系统 (GIS) ,不仅可直接服务于青藏铁路建设工程 ,也可为铁路沿线的环境保护以及建成后的铁路运营管理服务发挥重要作用 .青藏铁路信息系统数据库具有数据量大 ,数据项目众多 ,直接为工程建设服务等特点 .该数据库设计的创新点主要体现在以下几个新技术的运用 :应用实用地理信息系统的概念设计数据库 ;数据仓库的概念和技术在数据库集成中的应用 ;面向对象技术在数据库设计中的应用 ;利用元数据实现数据资源的快速检索 .数据库设计包括数据项目设计、数据概念化设计、数据详细设计和数据的集成设计 .

The creation of the Qinghai-Tibetan Railway Information System not only can directly serve the Qinghai-Tibetan Railway project construction, but also can play an important role to the environment protection around the railway and to the railway carrying and managing after it is set up. The database of the Qinghai-Tibetan Railway Information System has a great deal of data account. Its data items are multitudinous. It also serves the engineering construction directly. The innovation points of this paper mainly embody the application of the following newest technologies. The first is the application of practical GIS conception to design the database. The second is the application of the data warehouse conception and technologies in database integration. The third is the application of the object\|oriented technologies. The fourth is using metadata to effectively manage and fast query the data resources. The database design includes data item design, data conception design, data particular design, and data integration design.