一种基于B-Rep的地质模型建立方法

本文以钻孔数据为地质数据来源,分析了地质模型的数据结构及表示方法,设计了一种基于B-Rep数据结构的地质模型建立方法。先以地表勘测点为原始数据点利用分治Delaunay剖分算法建立主TIN,再向下延伸构建多层TIN结构,最后把地层分界面和地质区域边界保存为B-Rep模型。运用该方法开发了基于B/S架构的原型系统并建立了某区域的地质模型。算法结构简单且占用存储空间小,能够在WebGIS上得到应用。

A method of establishing geologic model based on B-Rep data structure

Using borehole data as geological data sources, we analyze the data structure and representation of the geological model and design a method of establishing the geological model based on B-Rep data structure. The method first takes surface survey points as original data to create a primary TIN by using Delaunay triangulation algorithm, then extends down to build a multi-storey TIN structure, finally to save the formation interface and boundary of geological area as B-Rep models. Using this method, we has developed a prototype system based on B/S structure and established a regional geological model. The algorithm procedure of our method is simple and saving storage space, it can be applied on WebGIS.