水上水下一体化三维河道场景构建与展示

Construction and display of integrated 3D water and underwater scenes

随着无人机与新型航拍技术的发展,无人机倾斜摄影技术在大范围地形数据采集过程中发挥了重要作用,三维测绘相关研究得到了极大的促进。而针对水利行业所需的水上地形与水下地形一体化生产过程的研究相对较少。本文布设统一控制点,采用固定翼无人机倾斜摄影测量技术进行水上地形测绘,应用RTK配合测深仪在船上进行水下河道三维地形数据采集,对于涉河建筑物采用BIM软件进行参数化建模。最后,针对水上地形数据,水下河道地形数据及建筑物三维模型进行融合处理,得到水上水下一体化三维河道场景,搭建Cesium平台进行三维展示。其研究成果可为水上水下一体化测绘与可视化提供技术帮助,有助于推进智慧水利的应用发展。

With the development of unmanned aerial vehicle (UAV) and new aerial photography technologies,UAV tilt photography technology has played an important role in the acquisition of large-scale terrain data,and research related to 3D mapping has been greatly promoted. However,there are relatively few studies on the integrated production process of water terrain and underwater terrain required by the water conservancy industry. This paper sets up a unified control point,uses fixed-wing UAV tilt photogrammetry to survey the terrain on the water,and uses RTK in conjunction with a depth sounder to collect three-dimensional terrain data on the river.For river-related buildings,BIM software is used for parameterization mold. Finally,fusion processing is performed on the water terrain data,the underwater river terrain data and the three-dimensional model of the building to obtain the integrated three-dimensional river scene of the water and underwater,and the Cesium platform is built for three-dimensional display. The research results can provide technical assistance for integrated mapping and visualization of water and underwater,and help promoting the evolvement of smart irrigation works applications.