倾斜摄影与激光扫描在土石方测算中的比较研究

A Comparative Study of Oblique Photography and Laser Scanning in Earthwork Calculation

随着数字化测量技术的发展,无人机被越来越广泛地应用于工程建设领域,其中倾斜摄影技术、三维激光扫描技术尤其是机载激光雷达逐渐应用于土石方测量工作中,均具有作业速度快、测算精度高、地形适应能力强等特点。但目前研究中,针对两者的工作效率与测算结果的比较研究鲜有涉及。为对2种方法在土石方测算中的应用进行比较,通过实证研究对其应用进行对比分析。结果表明,倾斜摄影与激光扫描作业速度快、精度高;两者相比,倾斜摄影的作业时间仅仅为激光扫描的54.17%,测量精度前者比后者高大约2倍。可见,倾斜摄影与激光扫描在土石方测算中均有显著优势,而倾斜摄影的优势更为突出。

With the development of digital measurement technology,UAVs are more and more widely used in the field of engineering construction,in which oblique photography technology,3D laser scanning technology,especially airborne LiDAR,are gradually applied to earthwork measurement work,all of which have the characteristics of fast operation speed,high calculation accuracy and strong terrain adaptability.However,few studies have been conducted to compare the efficiency and measurement results of both.In order to compare the application of the two methods in earthwork measurement,a comparative analysis of their applications is conducted through empirical studies.The results show that oblique photography and laser scanning are faster and more accurate;compared with each other,the operation time of oblique photography is only 54.17%of that of laser scanning,and the measurement accuracy of the former is about two times higher than that of the latter.It can be seen that both oblique photography and laser scanning have significant advantages in earthwork calculation,and the advantages of oblique photography are more prominent.