补充构架航线在低精度POS航摄数据测图中的应用

Application of Supplementary Frame Route in Low Precision POS Aerial Data Mapping

目前,无人机摄影测量作为主流的测绘手段,已在众多领域得到了广泛应用,但市场中多数无人机未搭载高精度定位测姿系统。在满足精度要求的前提下,为减少野外控制测量工作,研究利用高精度定位功能的实时动态载波相位差分技术(Real-Time Kinematic,RTK)无人机实施补充构架航线设计,探索了构架航线下的区域网平差原理,并在辅助光束法平差过程中,通过设置不同观测值权重提升了空中三角测量精度,从而降低了对控制点数量的需求。实验选取了某丘陵地区实施无人机航摄,经对6组不同方案下的解算结果进行分析,得出本文方法可有效提高对地定位测量精度,大大降低野外控制点布设工作,具有一定的应用价值。

At present,Unmanned Aerial Vehicle(UAV)photogrammetry,as the mainstream means of surveying and mapping,has been widely used in many fields,but most UAVs in the market are not equipped with high-precision positioning and attitude measurement system.On the premise of meeting the accuracy requirements,in order to reduce the field control survey work,this paper studied the use of high-precision positioning function of Real Time Kinematic(RTK)UAV to implement supplementary frame route design.The adjustment principle of area network under the framework of the route was explored,in the adjustment process of auxiliary beam method to improve the accuracy of aerial triangulation by setting different observation weights,and reduce the demand for the number of control points.The experiment selected a hilly area to implement UAV aerial photography,through the analysis of the solution results of six different schemes,it was concluded that this method could effectively improve the accuracy of ground positioning measurement,greatly reduce the layout of field control points,and had a certain application value.