关键词: 激光点云, 无人机影像, 数据融合, 三维建模, NURBS曲面重建

Abstract: The multi-source survey system is integrated to construct an integrated emergency survey system. Then based on the theory of point cloud data fusion and NURBS surface reconstruction, the system software is developed. Finally, taking the Xiapa landslide as an example, the renderings of drone aerial photography, multi-beam water gliding and ROV photography are also showed. The experimental results show that the integrated emergency survey system proposed in this study can be used for the early investigation for on-site landslide emergency rescue, the long-term monitoring of reservoir slopes, and the conventional surveying and geological survey in water conservancy and hydropower projects. It is of high efficiency, high precision, low cost and has broad application prospects in water conservancy and hydropower projects.

Key words: laser point cloud, drone image, data fusion, 3D modeling, NURBS surface reconstruction