基于无人机倾斜摄影测量的地表变形监测

Surface deformation monitoring based on UAV tilting photogrammetry

应急测绘情况下,基于传统大地测量手段难以进行高效的地表变形监测工作,当前无人机摄影测量技术的发展愈发成熟,无人机摄影测量能快速、高效、大面积地获取高空间分辨率的地表空间信息,使得基于无人机进行地表三维变化监测成为可能。文章基于消费级无人机倾斜摄影测量方法,通过建立不同时刻的三维地面模型,获取同名点的空间坐标,进行地表变形监测尝试,初步分析了地表变形阈值的确定方法。

Under the emergency mapping situation, it is difficult to carry out efficient surface deformation monitoring based on traditional geodetic means, but with the development and maturity of unmanned aerial vehicle photogrammetry technology, unmanned aerial vehicle photogrammetry can obtain surface spatial information with high spatial resolution quickly, efficiently and over a large area, which makes it possible to monitor 3D surface changes based on unmanned aerial vehicle. Based on the oblique photogrammetry method of consumer-grade unmanned aerial vehicle, the paper attempts to monitor land surface deformation by establishing 3D ground models at different moments to obtain the spatial coordinates of points with the same name, and preliminarily analyzes the determination method of land surface deformation threshold.