渤海海峡跨海通道地形三维可视化建模技术与实现

3D Terrain Visualized Modeling Technologies for Bohai Strait-crossing Tunnel

为给渤海海峡跨海通道规划与建设提供可视化的三维地形模型,分析渤海海峡跨海通道的线位规划,确定跨海通道沿线地形建模范围。采用ASTER GDEM数据作为渤海海峡地形数据源,并将其转换成DED格式的数据,以适合Multi Gen Creator建模;随后分析Creator中Open Flight数据结构、LOD技术和Delaunay三角形面构建方法等关键技术;最后,对渤海海峡跨海通道三维地形模型系统进行总体结构设计及建模流程设计,成功构建了视觉效果较好的三维地形,给出了沿线部分地形的可视化模型,为渤海海峡跨海通道规划奠定了良好的基础。

A visualized 3D terrain model of Bohai Strait-crossing tunnel is established,so as to analyze the alignment arrangement of the tunnel and to decide the modeling scope of the tunnel. The ASTER GDEM data are adopted as the resources for Bohai strait terrain; and then they are turned into DED mode. The technologies,Open Flight data structure,LOD technology and modeling method of Delaunay triangle surface,are analyzed. The structural design and modeling sequence design of 3D terrain modeling system are made. Finally,the 3D terrain with good effect is established and the visualized model of local terrain of the tunnel alignment is established,so as to provide foundation for the planning of Bohai Strait-crossing tunnel.