无人机免像控技术在带状地形测量中的应用

Application of UAV Image-free Control Technology in Strip Topography Surveying

目前无人机免像控技术常用于小范围的地形测量中,对于超长距离的带状地形,空中三角测量解算极易出现分层、弯曲及分叉等误差过大问题,导致解算成果不可用。针对这一问题,笔者深入分析空中三角测量原理,提出了一种能够满足1:500测图精度的解决方案,并通过项目验证了该方案的可行性。由于无需布设像控点,该方案大大减少了传统倾斜摄影测量外业工作量,大幅提高了工作效率。

At present,the image-free technology of UAV is often used in small-scale terrain survey.For the ultra-long distance belt terrain,the aerial triangulation solution is prone to large errors such as layering,bending and bifurcation,which leads to the unavailability of the solution results.In view of this problem,the author deeply analyzes the principle of aerial triangulation,and proposes a solution that can meet the mapping accuracy of 1:500,and verifies the feasibility of the solution through the project.Because there is no need to lay image control points,the solution greatly reduces the workload of traditional oblique photogrammetry fieldwork and greatly improves the work efficiency.