局部拓扑关系处理实现了在编辑过程中实时进行拓扑关系处理，弥补了传统拓扑关系处理的局限性。
This processing realizes the real time topology processing in editing, which makes up the confine of the traditional topology processing.
空间数据处理内容广泛，本文选择空间数据处理领域的数据格式转换、椭圆窗口线段裁剪、拓扑关系局部更新方法作为研究的内容。
Three parts have been researched which are the switchover of data format, elliptic window line segment-clipping and the method for updating local topological relation.
应用推荐