矢量数据的压缩方法常用的有道格拉斯—普克法、垂距法、光栏法。本文主要讨论道格拉斯—普克法，运用该算法的思想，用C语言于TC20中编写一个小程序，实现对既有线的简化。(压缩包里面有算法报告)-Vector data compression methods are commonly used Douglas- Puck law, down from the method, light field method. This article focused on Douglas- Puck law, the idea of using this algorithm, using C language in the preparation of TC20, a small procedure to achieve the simplification of the existing line. (Compression algorithm inside package report)