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Research on 3D geological modeling method based on section thinning-densification and close-range photogrammetry
Earth Science Informatics ( IF 2.8 ) Pub Date : 2020-05-09 , DOI: 10.1007/s12145-020-00463-8
Ming Hao , Donghui Wang , Chao Deng , Zhengwei He , Jianlong Zhang , Fan Deng , Xiaoming Ling

When 3D modeling of the geological body is carried out based on the section, problems such as unable to close the structural plane, slow rendering speed of the model and uneven and long and narrow section triangle network will occur due to the situation of super near point or too dense fold point. To solve the appealing problem, this paper proposes a section thinning-densification method based on the Douglas Peucker algorithm and equidistance algorithm. When processing the original section data, the Douglas Peucker algorithm is used for thinning, and then the equal distance is used for density increase. In this way, the section obtained by thinning-densification method solves the problem of uneven break points on the original section line and does not affect the shape of the section line, effectively solving the problem caused by too dense or too sparse break points on the section line in 3D geological modeling Series of modeling problems. In this paper, through the research on the modeling method of the above ground structure, the application demonstration of the above-ground and underground integrated three-dimensional model construction in Chengdu International Biological city is carried out, which verifies that the above-ground and underground integrated three-dimensional model construction technology is feasible and applicable and worthy of promotion.

中文翻译:

基于截面细化与近距离摄影测量的3D地质建模方法研究

当基于断面进行地质体的3D建模时,由于超近点的情况,会发生结构面无法封闭,模型渲染速度慢以及断面三角形网络不均匀,长而窄等问题。或折叠点太密。为解决这一吸引人的问题,本文提出了一种基于道格拉斯·皮克算法和等距算法的截面细化技术。在处理原始剖面数据时,使用Douglas Peucker算法进行细化,然后使用等距离进行密度增加。这样,通过稀疏致密化方法获得的断面解决了原始断面线上断点不均匀的问题,并且不影响断面线的形状,有效地解决了3D地质建模系列中剖面线的过密或过稀断点引起的问题。本文通过对地上结构建模方法的研究,对成都国际生物城地上,地下一体化三维模型的应用进行了论证,验证了地上和地下的三维结构。地下综合三维模型施工技术可行,适用,值得推广。
更新日期:2020-05-09
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