摘要： 为了从数字地图中快速提取出适合GIS应用的路网数据，需要有一种高效的存储 与管理路网地理实体属性数据的方法。该文讨论了在AutoCAD中存储与管理属性数据的各种 方法，选取自定义实体方法来建立路网数据模型，并利用OPM技术实现对地理实体属性数据 的直观显示和编辑，同时提出了一种自动建立网络拓扑关系的算法。

关键词: 地理实体, 网络拓扑关系, GIS, ObjectARX, OPM

Abstract: In order to generate road network data suitable for GIS application from digital maps rapidly, people need an effective method of storage and manag e ment in attribute data for geographic entity of road networks. Therefore, base d on the analysis of the existing methods of storage and management of attribut e d ata on AutoCAD, a new method of quick modeling of road networks based on vec tor graphics is developed by the authors. The implementing details such as cust om en tities, visualization algorithms and generation of topologic relations are prese nted in this paper.

中图分类号: 

• TP399