利用GEOSIS软件平台建立三维地质可视模型——以典型岩溶流域湖南洛塔为例

探讨了洛塔典型岩溶流域在缺乏钻孔资料的情况下,利用系列地质剖面、地质图、DEM等现有资料建立三维地质模型的建模方法及模型的应用。其中地质剖面数据的获取采用了计算机自动提取地形高程、地层界线、地下河位置等信息制图,精确快速。三维建模过程使用Geo SIS三维地质建模软件平台,以超体元实体模型、断层数学模型、褶皱几何模型等进行建模,模型形象逼真。建好的三维模型可以进行任意方向、角度的切割;进行地下漫游、放大、三维观察地层与断层之间的关系;进行揭层三维显示及单层三维显示; 进行任意形状的开挖显示。从建模的角度考虑,该方法对仅有地形图、水文地质图和极少量钻孔资料的情况下建立三维地质模型,具有普遍推广的意义。 

Using GEOSIS software to build 3D visualization geologic model-A case of typical karst watershed in Luota, Hunan province

This paper discusses how to use a series of geologic section,geologic map and DEM to build a 3D geologic model in Luota,Hunan province,a typical karst watershed where is lack of bore information.The data of geologic section,including topographic altitude,stratigraphic border,location of the underground river and other information,are captured automatically by computer to form maps,which is very exact and quick.3D modeling process was based on GeoSIS 3D modeling software which use super brick element solid model,fault mathematics model and fold geometry model.The built model is real and visual and can be used to make section in any direction and angle,to make underground cruise,to zoom in or out,to 3D observe the connection between stratigraphy and fault,to monolayer and multilayer 3D display,and can be opened to show in any shape.From modeling point of view,this method has general meaning for building 3D geologic model in any area where there are only some topographic maps,hydrogeologic map and few bore information.