一种基于LiDAR点云的河道纵横断面获取方法  

A Method of Extracting the River’s Longitudinal and Horizontal Section Based on LiDAR Point Cloud Data

作　　者：杜艺[1] 葛帅 单萌蕾 DU Yi;GE Shuai;SHAN Menglei(Shandong Survey and Design Institute of Water Conservancy,Jinan Shandong 250013,China;Jinan Institute of Real Estate Surveying,Jinan Shandong 250001,China)

机构地区：[1]山东省水利勘测设计院,济南250013 [2]济南市房产测绘研究院,济南250001

出　　处：《北京测绘》2020年第8期1114-1118,共5页Beijing Surveying and Mapping

摘　　要：本文基于LiDAR点云进行河道纵横断面的获取。包括数据采集、数据预处理、点云滤波、精编DEM等步骤;根据已有的河道中心线,按照特定距离,在精编的DEM上提取断面点;通过空三立体模型进行关键断面点位置的调整,得到断面点成果;给出与实测断面数据的精度对比。该方法节省了外业实测断面点所需的人力物力财力,提高了工作效率和质量。In this paper,we extracted the river’s longitudinal and horizontal section data from the LiDAR point cloud data.Including the data collection and preprocessing,the LiDAR point cloud filtration,fine editing DEM and other steps.Extracted section points data on the finely edited DEM at a specific distance according to the river’s centerline provided.Adjusted the position of key points through the aerotriangulation three-dimensional model to get the consequence of river’s longitudinal and horizontal section point data.At the end of the paper,we give the precision comparison with field-work data.This method improves work efficiency and quality,also saves the labor costs and the material and financial resources for field work.

关 键 词：航空摄影 激光雷达 数字高程模型 

分 类 号：P237[天文地球—摄影测量与遥感]