多尺度泥石流灾害Web数据模拟与三维可视化

Web Data Simulation and 3D Visualization of Multi-scale Debris Flow Disaster

由于缺乏相应的多尺度表达与索引机制,灾害模拟数据的三维动态可视化存在难以实时进行、渲染效果差、模式单一等问题。鉴于此,将泥石流灾害模拟数据与虚拟地形环境相结合,重点研究了泥石流灾害模拟数据实时在线发布与多尺度三维动态可视化方法。设计了网络服务总体框架体系,并重点探讨了多尺度数据组织、索引、动态表达等关键技术;选取案例区域研发原型系统,并开展了分析实验。结果表明,该方法能满足泥石流灾害在线实时三维动态可视化要求,也可根据用户对精度和流畅性的偏好与需求,选择相应尺度进行可视化表达。

Due to the lack of corresponding multi-scale expression and index mechanism, there are some problems such as carrying out real-time difficultly, rendering poor and single mode in disaster simulation data 3D dynamic visualization. In view of this, we combined the simulation data of debris flow with the virtual terrain environment, and researched focuses on the real-time online release of debris flow disaster simulation data and the multi-scale 3D dynamic visualization method in this paper. First of all, we designed the overall framework of network services. And then, we discussed key technologies of multi-scale data organization, index and dynamic expression. Finally, we selected a case area to develop prototype system, and carried out analysis experiment. The result shows that this method can meet the requirement of real-time 3D dynamic visualization of debris flow. According to the user demand for accuracy and fluency, this method can choose the appropriate scale to do visual expression.