This paper describes the functions of an asking the way system of traffic based on GIS, features and the designed thought and realizing method of the system.
本文描述了一个基于GIS的交通问路系统的功能、特点，以及该系统的设计思想和实现方法。
Then, according to practical problem on asking the way system, it introduces the structure and function of DSS. Finally, it takes Shanghai as example to show the future of DSS based on GIS.
通过系统结构与功能的分析，确定了数据库与模型库的范畴，并通过流程图将这一决策支持系统表示出来，最后以上海公交问路系统的开发展示了该系统的应用前景。
A bus asking the way system to suit all cities is present in this paper. The systems data structure and data file is analysed, the design thought and realization method of the system is described.
介绍了一个适合于各城市的公交车问路系统。分析了该系统的数据结构及数据文件，描述了该系统的设计思想和实现方法。
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