道路地形动态三维可视化及相关属性查询研究

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.

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

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.