AutoCAD s Symbol Tables. We will create a new layer create a Block Definition and explore how to use an Iterator to step through the entities contained in the Model Space block table record. In this section of the tutorial you will be introduced to t

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, roun