【摘要】 基于三维数字地质模型的地质空间剪切分析是"玻璃国土"建设所面临的关键技术之一。其难点包括复杂三维数据环境中的高效实体布尔运算方法,以及相关三维实体语义信息的实时查询处理。采用基于BSP树的多边形合并与分解技术,实现三维空间实体的布尔运算与矢量剪切;采用多线程实现不同要素集合的并行裁剪运算,并在三维空间数据库引擎的支持下,进一步提升地上地下一体化信息处理和语义查询效率。以武汉市规划信息系统为例,实现了地下硐室和隧道动态开挖过程的三维地质空间剪切分析,并结合水利水电工程地下厂房设计和矿山三维巷道设计实例,说明了基于三维数字地质模型的地质空间分析的综合应用效果。更多还原

【Abstract】 3D dynamic cutting spatial analysis technology is one of key technologies in the construction of "Glass Land".The challenges of three-dimensional dynamic tunnel excavation and analysis include efficient entity Boolean methods in complex three-dimensional data environment and real time query processing of semantic information of related three-dimensional entities.The technology of polygon merging and decomposition based on BSP,combined with multi-thread technology is adopted to achieve parallel cutting operations of different feature sets.With the support of three-dimensional database engine,the analysis efficiency is further enhanced for the integrated processing of above-ground,under-ground information and attribute query.In the instance of Wuhan planning information systems,the simulation of three-dimensional tunnel dynamic excavation analysis process is achieved.Examples of underground plant for water conservancy and hydropower engineering and 3D laneway design for mine are given to show the effects of its comprehensive application.更多还原