无人机大比例尺成图数据精度验证

Accuracy verification of large scale mapping data by UAV

针对无人机航空摄影测量技术生产大比例尺成图数据的几何精度问题,文中对不同比例尺的不同空三加密方式对数据精度的影响进行了分析。通过对无人机获取的1:2000、1:1000和1:500三种航摄数据分别进行有像控点和无像控点的空三加密处理,生产DOM和DSM成图数据,并利用实测检查点对其平面和高程精度进行检验。结果表明,有像控点空三加密处理生产的三种比例尺成图数据的平面和高程中误差均完全满足精度要求,且成图比例尺大小与精度高低成正比。

Aiming at the geometric accuracy of the large-scale mapping data produced by UAV aerial pho-togrammetry technology,in this paper,the impact of the different aerial triangulation encryption methodsat the different scales on data accuracy was analyzed.Three kinds of the aerial photography data of 1:2000,1:1000 and 1:500 obtained by UAV was used respectively for the aerial triangulation encryption processingwith and without image control points,and the mapping data of digital orthophoto map(DOM)and digitalsurface model(DSM)were produced,and the accuracy of plane and elevation of DOM and DSM was ana-lyzed by the measured check points.Results showed that the medium errors of the plane and elevation of thethree-scale mapping data produced and procesed by the image control point aerial triangulation encryptionmet fully the accuracy requirements,and the size of the mapping scale was proportional to the accuracy.