利用VB进行cad二次开发得到线路勘测设计系统，可进行线路的平纵横断面数据管理。-VB to cad secondary development line survey and design systems, and line level vertical and horizontal cross-section data management.

在CAD平台下运行，能根据原始测量数据，自动绘制原始横断面图。适用于工程测量及设计人员。(Running on the CAD platform, the original cross section can be automatically drawn according to the original measurement data. It is suitable for engineering survey and design personnel.)