摘要
为适应大型油气管道工程对地形数据的快速获取要求,可利用机载激光雷达数据进行快速DEM提取。讨论油气管道工程线状LiDAR数据快速DEM提取的两个关键问题:滤波和DEM构建。针对多植被丘陵地区线状数据,采用基于坡度变化的滤波算法对原始点云进行滤波;用不规则三角网线性内插算法对滤波结果进行处理,并构建DEM;用一组线状LiDAR数据做实验,将实验结果与实测数据进行比对。在构建的DEM上提取线路断面线,结果与实测地形基本相符。
Light Detection And Ranging(LiDAR) may be utilized for quick DEM acquisition in order to meet the requirements of quick terrain data acquisition in large oil and gas pipeline projects.Discussed are two key issues in quick DEM acquisition of linear LiDAR data in large oil and gas pipeline projects: filter and DEM construction.For linear data of hilly areas with much vegetation,applied is the filtering algorithm based on slope change for original point cloud filtering,applied is the irregular triangle nets linear interpolation algorithm for processing filter results and establishing DEM,applied are a set of linear LiDAR data for conducting experiment and the experimental results are compared with the measured data.Section line of the pipeline route is collected from the established DEM and its results are basically consistent with the measured data of the terrain.
出处
《天然气与石油》
2012年第4期87-90,104,共4页
Natural Gas and Oil
基金
中国石油天然气集团公司重点工程资助项目(HGPE201007508)
关键词
线状工程
点云
滤波
DEM构建
Linear project
Point cloud
Filtration wave
DEM building
