无人机倾斜摄影立体测图在农村权籍测量中的应用

Application of stereo mapping with Unmanned Aerial Vehicle tilt photography in rural ownership survey

文中为分析农村现有住房情况,获取农村宅基地及房屋数据信息,以往主要采用全站仪和RTK进行测量,对于甘肃偏远村庄而言,传统测量方法效率较低且工作量较大,需要投入大量的人力成本。随着无人机航拍技术的不断发展,倾斜摄影测量技术在诸多领域有了广泛的应用,能实现高分辨率拍摄并建立三维模型,通过对于三维模型的矢量化,实现对外业测量转变为内业绘图,极大的提高了工作效率。以无人机倾斜摄影立体测图在甘肃某农村的权籍测量为例,提出了相应的测量技术指标要求,设计了布控点方案及飞行方案,最终使用SV360立体测图系统生产出测区的实景三维模型成果。精度分析表明,检测了124个点,最大误差为+0.113 m,最小误差+0.001 m,距离中误差为±0.043,符合农房调查的精度要求。通过实践证明了无人机倾斜摄影的立体测图技术在农村权籍测量中的优势性。

In order to analyze the existing housing situation in the countryside and obtain the data and information of rural homestead and housing,total station and RTK were used to measure.For remote villages in Gansu Province,the traditional measurement methods were inefficient and workload was large,which required a lot of manpower cost.With the continuous development of UAV aerial photography technology,tilt photogrammetry technology had been widely used in many fields.It could achieve high-resolution photography and establish three-dimensional model.By vectorizing the three-dimensional model,it could transform the external measurement into the internal drawing,which greatly improves the work efficiency.Taking the registration survey of UAV tilt photography stereo mapping in a rural area of Gansu Province as an example,the corresponding measurement technical requirements were put forward,the control point layout scheme and the flight scheme were designed,and finally,the scene three-dimensional model results of the survey area were produced using SV360 stereo mapping system.Accuracy analysis showed that 124 points were detected,the maximum error was+0.113m,the minimum error was+0.001m,and the median error was+0.043,which met the accuracy requirements of farm house survey.Practice had proved the superiority of UAV tilt photography stereo mapping technology in rural registration measurement.