基于无人机LiDAR的道路勘测DEM构建研究

Research on the Construction of the DEM for Road Survey Based on the UAV LiDAR

当前道路建设的增速趋势和当前道路勘测方法的效率低下产生了严重割裂。其矛盾日益加深,限制了当前社会经济的发展速度。如何改进道路勘测方法使其效率能跟上不断增速的道路建设是当前道路勘测所面临的重要问题。选取广州某港口区域作为实验区,采集无人机LiDAR(Light Detection And Ranging)点云数据,对数字高程模型(Digital Elevation Model,DEM)构建环节中的点云数据滤波和数据内插及DEM的应用开展了一系列的研究和实验,通过构建道路勘测中的立体DEM,获得道路断面的数据,提高获取道路勘测中的勘探精度和效率。

The current growth trend of road construction and the current low efficiency of road survey methods have caused a serious disconnect,and their contradiction is deepening,which limits the current development rate of society and economy.How to improve road survey methods to enable their efficiency to keep up with the increasing speed of road construction is an important issue faced by current road survey.This article selects a port area in Guangzhou as an experimental area,collects UAV LiDAR point cloud data,conducts a series of research and experiments on the data filtering and data interpolation of point clouds and the application of the DEM,obtains the data of road sections by constructing a three-dimensional DEM in road survey,which improves the survey accuracy and efficiency in road survey.