一种基于径向基隐式曲面的地质三维建模方法

A Geological 3D Modeling Method Based on RadialBasis Implicit Surfaces

针对目前基于钻孔数据生成地质三维模型过程繁琐、算法复杂、中间数据庞大的弊端,本文使用钻孔点和径向基隐函数模型描述地层曲面,以多边形标量场提取曲面函数模型的等势面生成地质曲面进行可视化;再提取曲面的边框,根据网格大小长度提取边框的转折点数据;根据上下相邻两个地层曲面的边框转折点,绘制侧立面;合并侧立面与上下相邻两地质层曲面,生成地质三维模型。并使用郑州市高新区地质钻孔数据作为数据源进行实验,快速完整地生成了研究区的地质体三维模型。

In view of the drawbacks of the current process for generating geological 3D models based on drilling data,which are cum-bersome,complex in algorithms,and have large intermediate data,this paper describes the geological surfaces using drilling points and radial basis implicit function models.It visualizes the geological surfaces by extracting isosurfaces of the surface function models with polygonal scalar fields.The border of the extracted surface is determined by extracting the turning point data of the border based on the length of the grid.The vertical profile is drawn based on the turning points of the borders of the adjacent upper and lower geo-logical surfaces.Finally,the vertical profile is merged with the adjacent upper and lower geological surfaces to generate the 3D geolog-ical model.In the experiment,driling data from the High-tech Zone of Zhengzhou city is used as the data source,and a complete and fast 3D geological model of the study area is generated.