倾斜摄影测量技术在大比例尺地形图测绘中的应用研究

Research on the Application of Oblique Photogrammetry Technology in Large-scale Topographic Map Surveying and Mapping

针对垂直摄影生产地形图精度低的问题,本文提出采用倾斜摄影方式进行地形图生产的作业方案。首先利用无人机获取多角度倾斜摄影像片,其次利用建模软件进行空三加密和实景三维模型的生产,最后利用裸眼测图软件进行地形图的生产。利用外业实地采集的特征检测点对地形图精度进行检测,通过检测得到本次检测点平面点位中误差为±0.105米,高程点位误差为±0.154米,精度可以满足1:500地形图精度要求,可以为大比例尺地形图测绘提供有效参考。

Aiming at the problem of low accuracy of topographic map production by vertical photography,this paper proposes an operation plan for topographic map production by oblique photography.Firstly,the UAV is used to obtain multi-angle oblique photographic images,secondly,the modeling software is used for aerial three-dimensional encryption and the production of real-world 3D models,and finally,the naked eye mapping software is used for the production of topographic maps.The accuracy of the topographic map is detected by using the feature detection points collected in the field.Through the detection,it is obtained that the error in the plane point of the detection point is±0.105 meters,and the error in the elevation point is±0.154 meters,and the accuracy can meet the topography of 1:500.Map accuracy requirements can provide an effective reference for large-scale topographic map mapping.