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FOREST RESOURCES WANAGEMENT ›› 2021›› Issue (2): 99-109.doi: 10.13466/j.cnki.lyzygl.2021.02.014

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Estimation of Single Wood Factor of Picea schrenkiana var.tianshanica Forest Based on Backpack LiDAR

QIU Qin1(), ZHANG Wenge2, WANG Lei3, CAO Shanshan4, SUN Wei1,4()   

  1. 1. Computer and Information Engineering College,Xinjiang Agricultural University,Urumqi,Xinjiang 830052,China
    2. State owned Forest Administration Bureau of Western Tianshan,Yining,Xinjiang 835000,China
    3. Institute of Mordern Forestry,Xinjiang Academy of Forestry Science,Urumqi 830052,China
    4. Agricultural Information Institute,the Chinese Academy of Agricultural Sciences,Beijing 100081,China
  • Received:2021-02-09 Revised:2021-03-25 Online:2021-04-28 Published:2021-06-03
  • Contact: SUN Wei E-mail:1207788620@qq.com;sunwei02@caas.cn

Abstract:

High precision lossless rapid estimation of single wood factor is very important for forest resource monitoring and evaluation.Backpack lidar has good application potential in obtaining 3D forest structure parameters.The study takes Picea schrenkiana var.tianshanica forest as the research object,trying to obtain the point cloud data by backpack LiDAR scanning sample for single wood segmentation and estimation of single wood DBH,tree height and crown area.The accuracy evaluation and correlation test are carried out with the reference of ground measurement and visual interpretation data.The results show that:the precision F values of single wood segmentation using backpack LiDAR data are greater than 0.90,the average accuracy and recall are 0.96 and 0.90,respectively.The average recognition rate is 86.61%.R2 coefficient of determination of DBH and tree height is greater than 0.90,the average value of the DBH root mean square error is 1.11 and the height of the tree is 1.05;R2 coefficient of determination for area estimation of single crown is greater than 0.80,the average value of the root mean square error is 3.21.Therefore,using backpack LiDAR can achieve high precision extraction of single wood DBH and tree height parameters.

Key words: backpack radar, Picea schrenkiana var.tianschanica, single wood parameter, DBH, crown

CLC Number: