摘要
分析了圆弧线性化误差，给出不同误差度量方式．对如何选取圆弧提出了基于圆心角的判断方法，保证了准确选择相关圆弧段．等距放大样图一直存在很多问题、本文叙述的计算方法有利于减少误差源．
This paper discusses the error coming from linearization of arc and introduces a new method to deal with it. It puts forward an efficient algorithm, which is based on the angle of the center of arc and can be used to select an arc correctly. There are many problems in the offset curves technique. The technology discussed in this artiple may be able to solve them.
