低空摄影测量技术在土方量计算方面的研究

Research on Low-Altitude Photogrammetry Technology in Earthwork Calculation

摘要: 随着低空摄影测量技术的发展，如何利用该技术快速准确地测算出土方量成为了研究的热点。针对该技术在土方量测算过程中经常受到植被、建筑物等非地面点的影响，本文提出通过运用点云分类与编辑来剔除非地面点与噪点的方法。首先，利用飞控参数辅助地面控制点信息解密出测区点云坐标，进行点云分类，再分别对建筑物、植被等非地面点进行编辑，最后通过格网模型计算出土石方量。实验结果表明该方法能够满足土石方工程的精度要求，实现了低空摄影技术在土方工程方面的灵活运用。

Abstract: With the development of low-altitude photogrammetry technology, how to use this technique to quickly and accurately calculate the amount of earthwork has become a research hotspot. In view of the fact that the technology is often affected by non-ground points such as vegetation and buildings in the process of earthwork volume measurement, this paper proposes a method of using the point cloud classification and editing to eliminate the non-ground points and noise. Firstly, the flight control parameters are used to assist the ground control point information to decrypt the point cloud coordinates of the survey area, and point clouds are classified. Then the non-ground points such as buildings and vegetation are edited separately, and finally the earthwork volume is calculated through the grid model. The experimental results show that this method can meet the accuracy requirements of earth and stone works, and achieve the flexible application of low-altitude photography technology in earthworks.