地质体真三维建模是地学信息系统的核心问题之一。在分析现有三维建模方法的基础上,结合地质体特点,提出基于四面体的三维GIS数据模型,该模型以钻孔数据为原始数据,通过delaunay法则构建四面体,并对其进行剖切来描述地质体的内部结构,不仅精确模拟地层,有效表达复杂构造形态,而且可以描述具有复杂边界的空间实体。
Three-dimensional modeling of the Geo-body is a critical issue in 3D GIS. Considering the current 3D modeling and combining with the characteristics of geologic body, a new 3D GIS model based on tetrahedral network (TEN) was proposed. The model uses the drilling data as the original data, and TEN is established with delaunay rule. Then, the TEN is parted to describe its inner structure construct. It can not only accurately simulate the stratum to reflect the internal structure of geo-body, but describe the spatial entities with complex boundary.