机载LiDAR在林地面积调查中的工程应用  

Engineering Application of Airborne LiDAR in Forest Area Survey

作　　者：李轶波 李文山 LI Yibo;LIWenshan(Shanxi Huaye Survey Engineering Technology Co.,Ltd.,Taiyuan 030000,China)

机构地区：[1]山西华冶勘测工程技术有限公司,山西太原030000

出　　处：《地理空间信息》2023年第1期131-134,共4页Geospatial Information

基　　金：国家自然科学基金资助项目(41201193)。

摘　　要：针对传统林地测量方式困难、计算面积结果不准确的问题,采用机载LiDAR系统进行林地面积计算。首先通过外业数据采集、内业数据解算、点云去噪和分离地面点等步骤,得到林地范围的点云;然后通过高程判断,获取林地范围的边界;最后将几何计算得到林地面积与实地调查计算得到的面积进行偏差对比,从而验证该方案的可行性与准确性。实验结果表明,大部分区块的点云测量面积大于人工测量,说明机载LiDAR技术在林地面积调查方面具有较大优势,为复杂地形测量提供了较高效的新型测绘技术方法。Aiming at the difficulties of traditional forest measurement methods and inaccurate calculation results,we adopted the airborne LiDAR system to calculate the forest area.Firstly,through the steps of field data collection,internal data calculation,point cloud denoising and post-processing of separating ground points,we obtained the point cloud of forest range.Then,we obtained the boundary of forest range by the elevation judgment.Finally,we compared the forest area obtained by geometric calculation and field investigation to verify the feasibility and accuracy of the scheme.The experimental results show that the point cloud measurement area in most blocks is larger than the manual measurement,indicating that the airborne LiDAR technology has great advantages in forest area survey,which can provide a more efficient new surveying and mapping technology method in complex terrain measurement.

关 键 词：机载LIDAR 林地面积 点云 工程应用 技术流程 

分 类 号：P231[天文地球—摄影测量与遥感]