基于实景三维模型的地形图质量检验方法

Application and analysis of real 3D model in topographic map quality inspection

针对传统测绘地理信息质检方式存在的无法准确勘测困难地形的问题,本文提出了一种基于实景三维的地形图质量检验方法。利用实景三维技术开展地形检验,通过倾斜摄影获得复杂地形的相关测量数据,并与传统测绘结果对比,判断基于实景三维技术模型的地形图质量检验方法的准确性。通过分析发现,针对困难测绘地区获取影像数据困难的问题,需要通过优化像控布设参数、倾斜摄影测量相关参数,以及控制三角测量与光束法区域平差等方式进行地形图测量和质量检验,以提升地形图质量检验工作的效率与准确性。对于一些大比例尺地形图质量检验工作而言,利用传统质量检验方式提取数据、检验覆盖工作难度较大。而基于实景三维模型的地形图质量检验方法可以提高测量结果的准确性,降低困难地形图质检工作难度,值得大力推广应用。

To solve the problem that the traditional quality inspection method of surveying and mapping geographic information can not accurately survey difficult terrain,a quality inspection method of topographic map based on real 3D is proposed.The terrain inspection is carried out by using the 3D technology of real scene,and the relevant survey data of complex terrain are obtained by using the tilt photography,and the accuracy is compared with the traditional surveying and mapping results.Therefore,the accuracy of the topographic map quality inspection method based on the 3D technology model of real scene is judged.Through analysis,it is found that in order to improve the efficiency and accuracy of topographic map quality inspection,it is necessary to optimize the image control layout parameters,tilt photogrammetry related parameters,control triangulation and beam method regional adjustment and other ways to carry out topographic map measurement and quality inspection in difficult mapping areas.For the quality inspection of some large-scale topographic maps,it is difficult to extract data and test coverage by traditional quality inspection methods.The topographic map quality inspection method based on 3D model of real scene can improve the accuracy of measurement results and reduce the difficulty of topographic map quality inspection work,which is worth popularizing and applying.