基于Auto cad数字地形图分幅裁剪的实现

摘要

针对当前市场上很多地形图成图软件在分幅时裁剪不干净，容易丢对象和分幅速度慢等情况，笔者使用Vi⁃sual Lisp编程语言，基于Autocad中的“Break”命令开发了一个相对完善的裁剪工具以代之。%　　Currently, many topographic map-generation softwares cannot produce a clean subset image, easily lose ob-jects and are slow in formation of a subset image. Instead, this paper, based on the command “break”of Autocad, de-veloped a relatively perfect subset image tool using programming language VisualLisp.