传统大比例尺地形测图技术存在工作量大、数据更新速度慢、作业效率较低等不足。随着新型测绘技术的发展,大比例尺测图技术发生了较大改变,倾斜摄影测量、三维激光扫描等技术成为研究热点。研究了采用无人机倾斜摄影测量技术进行1∶500高精度地形测图的关键技术,分析了技术要点,并以广州市增城区某村庄为例,从平面和高程精度两个方面进行了分析验证。结果表明,在严格控制飞行姿态、像控点测量等条件下,基于无人机倾斜摄影测量的1∶500地形测图精度满足规范要求,作业效率得到提升。

Traditional large-scale topographic mapping technology has disadvantages of large workload, slow data update speed and low operation efficiency. With the development of new surveying and mapping technologies, large-scale mapping technologies have undergone major changes. Oblique photogrammetry and 3D laser scanning have become research focus. We studied the key technologies of 1∶500 highprecision topographic mapping using UAV oblique photogrammetry technology, and analyzed and verified the accuracy of plane and elevation taking a village in Zengcheng District, Guangzhou for example. The results show that under the conditions of strict flight attitude control and image control point measurement, the accuracy of 1∶500 topographic mapping based on UAV oblique photogrammetry can meet the specification requirements, and the operation efficiency is improved.