This paper introduces the GIS space point? Line? Surface entity model based on topology data and the automatic topology model which is based on the objects model.
介绍了以拓扑关系数据为基础的GIS空间点、线、面对象实体模型，给出了基于对象实体模型的自动拓扑关系模型。
The automatic tracking of power network topology is well implemented by use of the snap model put forward in the graphic platform.
图形平台中提出的捕捉点模型很好地实现了电气主接线图的网络拓扑自动跟踪。
An abstract object-oriented model for power network topology is built up and an automatic generation method of primary topology is introduced, which applies the model and system vector coordinates.
提出了一种面向对象的抽象电力网络拓扑的模型，并用此模型实现了用系统矢量图的坐标关系自动生成原始拓扑的方法。
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