摘要
通过倾斜摄影测量空地融合技术,精细构建了榆木山东缘断裂场地三维地质实景模型;特别阐述了提高空三加密计算通过率的航拍技巧,通过实测案例获得了超高分辨率的三维模型。利用倾斜摄影测量空地融合技术精细化建模的技术经验为:(1)要求在3个不同航高进行航拍,且中层航高是上层高度的1/3;(2)上层正摄航拍范围尽可能放大,中层采集区域不可超出上层范围,而地面补拍区域又在中层倾斜摄影范围之内;(3)若没有中层航拍环节,则需在内业空三加密处理前手动添加多个连接点来实现与上层影像的连接。
In this paper,we used the oblique photogrammetry air ground fusion technology to construct a 3D geological real scene model of the fault site in the eastern margin of Yumu Mountain.In order to improve the calculation passing rate of aerotriangulation,we obtained the 3D model with ultrahigh resolution through the actual measurement case,and gave the technical experience of using the oblique photogrammetry air ground fusion technology to refine the modeling.(1)It is required to have three different altitudes for aerial photographing,and the middle altitude is one-third of the upper altitude.(2)The upper level positive photographing range shall be enlarged as much as possible,and the middle acquisition area shall not exceed the upper level range,while the ground supplementary photographing area shall be within the middle oblique photographing range.(3)If there is no middle aerial photographing link,multiple connection points need to be added manually before the aerotriangulation in the internal industry to realize the connection with the upper level image.
出处
《地理空间信息》
2021年第5期42-44,50,I0010,共5页
Geospatial Information
基金
国家自然科学基金资助项目(41101520)。
关键词
倾斜摄影测量
空地融合
三维建模
地质
精细化
oblique photogrammetry
air ground fusion
3D modeling
geology
refinement
