道路地形动态三维可视化及相关属性查询研究

Study on the 3D Visualization and Relevant Attribution Inquiry of Road and Terrain

采用CDT理论建立道路与地形整体模型,并转化成格网模型进行三维显示;采用小波算法对格网地形模型进行简化,成功应用在道路三维场景实时浏览中;根据OpenGL技术原理,解决了三维空间数据与地物属性数据库的连接;在三维空间中,通过鼠标点击获取三维空间目标,再从地物属性数据库中返回此目标的属性数据,供设计者参考。

The authors set up the road and terrain model with CDT theory, and transform it into mesh model and show the three-dimension view. Adopting the wavelet algorithm to simplify the mesh model, the authors succeed in real three-dimensional scene browsing. According to OpenGL principle, the authors have found the connection between the three-dimensional space data and the attribute database of surface feature, obtained three-dimensional space goal by click mouse and fed back attribute datum of goals from surface feature attribute database.