本文利用Surfer绘图软件在画线和数字化功能的基础上，通过程序数据换算，绘制平剖图；
On the base of the function of SURFER software, such as line drawing and digitalization, the profile in plan is prepared.
介绍了矿井地测信息系统（CG IS）的绘图原理和软件功能，对煤矿应用CGIS的现状进行了分析，提出了数字化制图的实施办法。
The paper introduces the principle and software functions of CGIS and gives an analysis on the current application in coal mine, in the same time brings forward measures of digitizing drawing.
它比利用软件实现的直线插补法速度快，精度高，适用于数字控制的机械加工或绘图设备。
It has higher speed and is more accurate than software method, therefore more suitable for all kinds of digital machine and digital plotter.
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