三维激光点云建筑物立面图快速成图技术及精度分析

Rapid Mapping Technology and Accuracy Analysis of 3D Laser Point Cloud Building Elevation

本文通过三维激光点云采集建筑物立面图实例,研究三维激光点云采集建筑物立面图快速成图方法,首先通过程序实现了建筑外立面图案自动填充、外立面文字自动注记和外立面自动标注标高等功能,相对于之前的作业人员根据图示逐个填充和注记建筑物外立面图,可以节省大量时间,极大地提高制图工作效率。其次,通过三维激光点云采集的边长与实地手持测距仪测量的边长进行比较,以进行精度统计。经分析得出:三维激光点云采集建筑物立面图可以显著减少外业工作量,通过程序实现图面自动整饰还能进一步提高工作效率,且精度符合要求。

In this paper,through the example of 3D laser point cloud acquisition of building elevation,the rapid mapping method of 3D laser point cloud acquisition of building elevation is studied.First of all,through the program to achieve the building elevation automatic filling,elevation automatic annotation and elevation automatic labeling function.Compared with the previous operators to fill and note the building elevation one by one according to the drawings,it can save a lot of time and greatly improve the efficiency of drawing work.Secondly,the side length collected by 3D laser point cloud is compared with the side length measured by the field handheld rangefinder,so as to carry out precision statistics.The analysis shows that:3D laser point cloud acquisition of building elevation can significantly reduce the field work workload,through the program to realize the automatic surface finishing can further improve the efficiency,and the accuracy meets the requirements.