基于倾斜摄影测量的无居民海岛现状勘定方法

Status survey method of uninhabited islands based on tilt photogrammetry

为高效获取无居民海岛的基础测绘数据,本文采用免像控无人机倾斜摄影测量的方法对无居民海岛进行测绘。根据实验数据,得出免像控实景三维建模后,检查点平面位置最大误差为17.57 cm,中误差为13.83 cm;高程最大误差为-17.63 cm,中误差为11.54 cm,该结果满足1∶500比例尺数字线划图的相应精度要求。由此可见,免像控无人机倾斜摄影测量技术可在保证测量精度的前提下,在无居民海岛的基础测绘中发挥重要作用。

In order to efficiently obtain basic surveying and mapping data for uninhabited islands,this article adopted unmanned aerial vehicle(UAV)-based tilt photogrammetry without image control to survey and draw uninhabited islands.Through experimental data,it can be concluded after three-dimensional(3D)real scene modeling without image control,the maximum error at the checkpoint plane position is 17.57 cm,with a mean square error of 13.83 cm.The maximum error in elevation is-17.63 cm,with a mean square error of 11.54 cm.These results satisfy the corresponding accuracy requirements for digital line graphics of 1∶500 scale.It can be seen that UAV-based tilt photogrammetry without image control can play an important role in the basic surveying and mapping of uninhabited islands while ensuring measurement accuracy.