摘要
无人机航测技术已广泛应用于铁路地形图测绘领域,但其单模型像幅小的缺点严重制约着生产效率。无人机影像大场景立体模型能够大范围地再现地形地物三维信息,弥补单像对立体模型观测范围受限的缺点,在大场景模型上进行测图能够极大地提高无人机航测制图效率。该文通过对某山地丘陵地区进行地形图测绘,分析无人机影像大场景立体模型的数学精度,验证该技术测绘铁路大比例尺地形图的可行性。最后得出研究区域内像控点的平面位置中误差为0.109 m,高程中误差为0.255 m,满足国家标准中对于二级地形、1∶2 000比例尺地形图地物平面中误差0.6 m、高程中误差0.5 m的要求。
UAV aerial survey technology has been widely used in the field of railway topographic mapping, but its shortcoming of a single model with a small image size seriously restricts production efficiency. The large scene stereo model of UAV images can reproduce the three-dimensional information of the terrain surface and ground objects, which makes up for the shortcomings of the limited observation range of the single model. Using the large scene stereo model can greatly improve the production efficiency of UAV aerial survey and mapping. In this paper, by producing a topographic map in a mountainous and hilly area, the mathematical accuracy of the large scene stereo model of the UAV images is analyzed, and the feasibility of the technology for surveying and mapping the large-scale topographic map of the railway is verified. In conclusion, the RMSE of the horizontal position of the image control points in the research area is 0.109 meters, and the RMSE of the vertical position is 0.255 meters,which meets the requirements that for the 1 ∶2 000 scale topographic map in a mountainous and hilly area, the horizontal and vertical RMSE shall be less than 0.6 and 0.5 meters respectively.
出处
《科技创新与应用》
2023年第8期193-196,共4页
Technology Innovation and Application
基金
陕西省技术创新引导专项(基金)计划(2020CGHJ-010)
中铁第一勘察设计院集团有限公司重点专项研发项目(2021KY73ZD(ZDZX)-01)
中铁第一勘察设计院集团有限公司2022年度软件开发项目(2022RJ25)。
关键词
无人机影像
大场景立体模型
铁路地形图测绘
数学精度
精度分析
UAV images
large scene stereo model
railway topographic mapping
mathematical accuracy
precision analysis
