地下空间数据挖掘与虚拟现实

Underground spatial data mining and virtual reality technology

目前,地理信息系统处理空间数据多停留在点、线、面三类二维的地表数据,对离散或连续的真三维数据进行处理尚处于初步研究阶段。本文基于ArcGIS9.2版本中新开发的Extrude Between模块的拉伸封闭多边形面功能,以某校区地下87个离散钻孔数据为例,进行三维虚拟实现:首先,进行空间数据的挖掘,即对87个钻孔数据通过预处理,进行对具有特异值的各个钻孔数据层空间内插,生成具有深度属性的各层等高线,最终生成模拟各地层上表面形态的TIN;然后,虚拟实现真三维数据的可视化及体视化,达到对地下实体空间进行逼真模拟,反映该校区地形、地貌、地层分布以及水文地质特征。

Nowadays, Geographical Information System mainly deals with 2D spatial data while the study of 3D data processing is still at the early stage. Based on the Extrude Between of ArcGISg. 2, taking 87 discrete underground drill data of a campus as example, 3D virtual reality was realized. Firstly, spatial data mining including 87 drill data pre-processing, spatial interpolation, contour generation and TIN forming was performed. Secondly, 3D virtual realization was finished to simulate underground space and hydrogeology of the area.