测绘中常用的一些制图符号，以及内业展点程序。主要包括：
围墙、栏杆、道路、圆堤的定义绘制，坐标正算反算程序，读取文件在CAD中进行展点。(Some cartographic symbols used in surveying and mapping as well as internal exhibition procedures are presented. Mainly include:
The definition of the fence, railings, roads, round embankment, coordinate calculation program, read the file in the CAD expansion points)