精密单点定位技术在1:25000航测成图中的应用

Application of GPS Precise Point Positioning Technology in 1:25000 Aerial Photogrammetry Map Production

基于精密单点定位技术的GPS辅助航测技术的推广应用,节约了传统像片控制测量的作业成本,优化了传统空三加密工序的技术流程,缩短了航测成图周期。以1∶25000地形图测绘生产为例,介绍了并进行基于精密单点定位的GPS辅助空三试验,分析并比较了空三方法的加密精度,得出了基于精密单点定位的GPS辅助摄影进行中小比例尺航测成图时新的像控布点、像控测量以及GPS辅助空三加密的方法。

The GPS Precise Point Positioning supported aerial photogrammetry technology is widely introduced recently. This technology can save the cost of control point measure, optimize the technology flow of aero triangulation and cut the map production period compared with traditional aerial photogrammetry. An example of 1：25000 scale topography map production is set up, the GPS supported aero triangulation experiment based on precise point position is introduced, and ac- curacy of the aerial triangulation is analyzed. The conclusion of image control point distribution and measurement, the method of GPS supported aero triangulation in middle and small scale map pro- duction based on precise point positioning are gotten.