基于数字地球平台的地质钻孔三维模拟与可视化

3D modeling and visualization of geological boreholes on digital earth platforms

研究了地质钻孔信息的管理和可视化技术,提出了一种在数字地球平台中进行城市钻孔信息模拟和可视化的方法。该方法基于一个统一的钻孔数据库标准,首先将钻探点位信息和地层分层信息组织成具有不同细节层次的钻探点位模型、钻孔分层散点模型和钻孔管段模型,然后构建基于细节层次模型的海量钻孔信息多尺度表达机制,最后将这些模型加载到数字地球平台中进行可视化及查询、分析。在上海市的应用实例显示,该方法实现过程简单、自动性高,生成的模型易于在国际互联网上进行分发、集成与共享。该方法的应用将有助于地质工作者向其他科技人员以及社会公众展示、分发自己拥有的钻孔信息,为以钻孔数据为代表的城市地质信息的社会化服务奠定基础。

In order to represent and disseminate geological boreholes on digital earth platforms, we present an automatic method for the modeling and visualization of boreholes in urban areas. At first, several borehole models with different levels of detail, such as point placemarks, scatter dots and tube models, are created according to a standard form of borehole database. And then, a LOD-based multi-scale representation is constructed to visualize massive boreholes. Finally, borehole models are loaded into a digital earth platform for 3D visualization and spatial analysis. A concrete example of applying this method to create borehole models in Shanghai shows that the modeling process is simple, automatic and effective. In addition, borehole models generated from this method are well-suited to the dissemination, integration and visualization on the Internet. Therefore, the widespread future use of this method will help earth scientists share their borehole data more easily. This will make borehole information accessible to a broad user base, and may promote the development on the social service of geological information in urban areas.