倾斜摄影和激光点云技术在大比例尺测图中的应用

在传统大比例尺测图中，建筑物特征线的获取方法或精度高效率低或效率高精度低。本文通过对倾斜三维模型分析，提出了基于直线公理的建筑物特征线快速提取方法；针对高程点数据均为人工采集的现状，引入激光点云数据通过分类插值法自动生成高程特征点。研究证明，本文方法在精度与效率等方面均可取得良好效果，提高了特征线（建筑物线）、特征点（高程点）采集的自动化程度。

Application of Oblique Photography and Laser Point Cloud in Large Scale Mapping

In traditional large scale mapping,the method of obtaining the building's line is inefficient with high-precision or efficient with low-precision .According to the analysis of the oblique 3D model ,the paper proposes a fast feature extraction method of building's feature line based on the linear axiom .In view of the status that elevation points are acquisited manually ,a new method for the automatic generation of elevation points is proposed .It can be realized by the classification and interpolation of the laser point cloud data .Study proves that the method can get good results in both accuracy and efficiency and improve the degree of automation .