基于LiDAR数据在水利DLG生产中的应用
Application of LiDAR Data in Water Conservancy DLG Production
孙昌瑜 1焦元元 2刘忠强 1杨清臣 1邸健1
作者信息
- 1. 吉林省水利水电勘测设计研究院,吉林长春 130012
- 2. 吉林省地理信息院,吉林长春 130000
- 折叠
摘要
以工程实例为依托,介绍了LiDAR数据制作DLG的主要流程,论证了由DOM及点云滤波生成的DEM制作DLG成果完全满足1∶1000比例尺精度要求.而且影像数据使用激光雷达的高精度惯导及GPS数据生产的POS,可完全实现免相控.激光点云滤波的DEM与航摄影像DEM对比发现,对植被茂密区域及较窄的水利渠道,点云滤波DEM数据可准确的获取高程信息,而航摄影像DEM数据则无法获得.
Abstract
Based on engineering examples,the main process of producing DLG using LiDAR data is introduced,and it is demonstrated that the results of produced DLG using DEM generated by DOM and point cloud filtering fully meet the accuracy requirements of 1∶1000 scale topographic map. Moreover,the image data is produced using high-accuracy inertial navigation of LiDAR and POS from GPS data,which can fully achieve image control point free adjustment. Comparison between laser point cloud filtering DEM and aerial photography DEM reveals that for areas with dense vegetation and narrow water channels,point cloud filtering DEM data can ac-curately obtain elevation information,while aerial photography DEM data cannot.
关键词
激光点云/数字正射影像模型/数字高程模型/DLG生产Key words
laser point cloud/DOM/DEM/DLG production引用本文复制引用
出版年
2024
NETL
NSTL
万方数据