基于激光雷达点云的钱塘江古海塘建模研究

Research on Modeling the Ancient Sea Dike of Qiantang River Based on LiDAR Point Clouds

为了能够保存古海塘数据资料与探究构造,提出基于激光雷达点云的古海塘数字化建模方法。使用三维激光雷达扫描仪快速、非接触地获取古海塘点云,通过三维主成分分析得到其正射点云切片。利用切片点云描绘出平、立面图,根据CAD图纸建立古海塘BIM模型,为古海塘遗址的挖掘和保护提供了新思路与方法,也可为今后钱塘江古海塘申报世界文化遗产提供理论参考。

This paper proposes a digital modeling method for ancient sea dikes based on LiDAR point clouds.Using a 3D LiDAR scanner,the point clouds of ancient sea dikes are rapidly and non-contactually acquired,and orthographic point cloud slices are obtained through 3D principal component analysis.Use the sliced point cloud to depict the flat and elevation drawings,and build a BIM model of the Ancient Sea Dike based on the CAD drawings.This offers new ideas and methods for the excavation and protection of ancient sea dike sites,and also provides a theoretical reference for the future application of the ancient Qiantang River sea dikes as a World Cultural Heritage site.