稀少控制条件下无人机空三加密及在公路地形测图中的精度分析

UAV Aerial Triangulation and Accuracy Analysis with Scarce Controls in Highway Topographic Mapping

针对无人机航空摄影测量地面控制点多的问题,介绍了一种无人机影像空中三角测量方法,基于动态精密单点定位,使用单台GNSS接收机获得高精度摄站点三维坐标,地面无需架设GNSS基站。通过平地、山地公路项目试验,分析了稀少控制条件下的控制点布设方法及空三加密精度,少量地面控制点即可满足1∶2000比例尺地形图的精度要求,极大减少了内、外业工作量,简化了无人机航空摄影作业方式。

Against the UAV aerial photogrammetry ground control points problem,this paper introduces a UAV aerial triangulation method. The method is based on dynamic PPP,using a single GNSS receiver to obtain coordinates of the camera site. By highway project experiments,it analyses the control point layout method and the accuracy of adjustment with scarce ground control points. The proposed method greatly reduces the effort of field work,simplifies the workflow of UAV aerial photography.