带约束的体元属性插值方法与可视化表达
发布时间：2018-08-02 12:24
【摘要】：在地质体体元剖分、属性插值中如何实现属性模型和空间结构模型的一致性,体现地质知识的表达,是一个难点问题。融合边界表示法和角点网格模型,以B-Rep表达地质体空间形态,以角点网格模型离散化地质体,建立地质体三维结构模型及其属性模型。充分考虑到地质原理和相关的地质约束条件,对位于断层面两边同一地层插值时,采用"距离环绕法"求点对距离参与插值计算。在地质体建模时引入"等时地层"的概念,纵向上采用分层插值的方式对属于同一等时地层的地质体属性数据进行求值,横向上采用分区域插值的方法,通过提取沉积相边界来添加控制线约束插值,很好地解决了地质体结构模型对地质体属性模型的插值约束问题。将理论与实践相结合,利用福州三维城市地质数据,将基于角点网格的体元模型和三维属性插值算法实际应用到三维城市地质系统的建模中。
[Abstract]:How to realize the consistency of attribute model and spatial structure model and how to express geological knowledge is a difficult problem in geological volume element division and attribute interpolation. The boundary representation method and the corner mesh model are combined, the spatial shape of geological body is expressed by B-Rep, the geological body is discretized by corner grid model, and the 3D structure model and attribute model of geological body are established. Considering the geological principle and the related geological constraints, the "distance surround method" is used to calculate the distance of the same strata on both sides of the fault plane. The concept of "isochronous stratigraphy" is introduced in the modeling of geological bodies. The method of stratified interpolation is used to evaluate the attribute data of geological bodies belonging to the same isochronous strata, and the method of regional interpolation is used in horizontal. By extracting sedimentary facies boundary and adding control line constraint interpolation, the interpolation constraint problem of geological body structure model to geological body attribute model is solved well. Combining theory with practice, the volume element model based on corner grid and 3D attribute interpolation algorithm are applied to 3D urban geological system modeling by using Fuzhou 3D urban geological data.
【作者单位】： 北京大学地球与空间科学学院;中国地质大学(武汉)计算机学院;中国地质大学(武汉)智能地学信息处理湖北省重点实验室;
【基金】：国家863计划重点项目课题(2012AA121401) 国家自然科学基金项目(41172300)
【分类号】：P628
本文编号：2159429
[Abstract]:How to realize the consistency of attribute model and spatial structure model and how to express geological knowledge is a difficult problem in geological volume element division and attribute interpolation. The boundary representation method and the corner mesh model are combined, the spatial shape of geological body is expressed by B-Rep, the geological body is discretized by corner grid model, and the 3D structure model and attribute model of geological body are established. Considering the geological principle and the related geological constraints, the "distance surround method" is used to calculate the distance of the same strata on both sides of the fault plane. The concept of "isochronous stratigraphy" is introduced in the modeling of geological bodies. The method of stratified interpolation is used to evaluate the attribute data of geological bodies belonging to the same isochronous strata, and the method of regional interpolation is used in horizontal. By extracting sedimentary facies boundary and adding control line constraint interpolation, the interpolation constraint problem of geological body structure model to geological body attribute model is solved well. Combining theory with practice, the volume element model based on corner grid and 3D attribute interpolation algorithm are applied to 3D urban geological system modeling by using Fuzhou 3D urban geological data.
【作者单位】： 北京大学地球与空间科学学院;中国地质大学(武汉)计算机学院;中国地质大学(武汉)智能地学信息处理湖北省重点实验室;
【基金】：国家863计划重点项目课题(2012AA121401) 国家自然科学基金项目(41172300)
【分类号】：P628
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