基于AutoCAD的弧段地质剖面精确绘制算法与实现

Accurate drawing algorithm and realization of arc geological section based on AutoCAD

当地质平面图中的剖面线包含弧段时,传统的基于AutoCAD开发的绘图工具绘制出的地质剖面图总是比实际剖面长度短一点。为解决这一问题,利用弧长公式、AutoCAD二次开发技术、出图标准,研究并实现了带弧段地质剖面图的精确绘制,并结合工程地质数据库,自动在剖面图上绘制勘察信息。应用效果表明:绘制出的弧段剖面图长度、地形高程、地质界线特征、相交剖面特征以及勘察点位置与平面图完全吻合,图上自动绘制的勘察信息与工程地质数据库数据一致。该技术提高了制图效率,提升了工作质量,可在多个平台的弧段地质剖面图绘制中推广。

When a section line contains arcs in a geological plane,the geological section drawn by the traditional drawing tool based on AutoCAD is always shorter than the actual section length.In order to solve the problem,the arc length formula,secondary development technology of AutoCAD,and the drawing standard are used to study and realize the accurate drawing of the geological profile with arc,and combined with engineering geological database,the investigation information is automatically drew on the profile.The application results show that the length of the arc profile,the terrain elevation,the geological boundary characteristics,the intersection profile characteristics,and the investigation point position all agree well with the plan graph.The automatically drawing survey information on the map is consistent with that in the engineering geological database.This technology can improve the drawing efficiency and the work quality,and can be popularized in multiple platforms about arc geological profile drawing.