摘要
城市给水管网具有数据量大、地上地下目标之间关系复杂以及要处理图形信息等特点.文中给出了一个基于框架的数据模型,它适应这些特点和用于工程目的,以及对系统进行结构描述和目标组织.同时还分析了整个系统的体系结构,并对各功能模块设计进行了研究.
City water—suppl piping networks have a lot of variable and, complex relations among objects both underground and above ground. Two kinds of information (text and picture) are to be processed. In this paper, the structure of an information system is analyzed and all functional modules are introduced. A new data model named frame-based data model is given and it is useful in engineering fields.
关键词
城市
给水
管网
信息系统
information sysem
engineering database
data model
frame
water supply net works.
