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基于机载激光雷达的寒温带典型森林高度制图研究

穆喜云 张秋良 刘清旺 庞勇 胡凯龙

穆喜云, 张秋良, 刘清旺, 庞勇, 胡凯龙. 基于机载激光雷达的寒温带典型森林高度制图研究[J]. 北京林业大学学报, 2015, 37(7): 58-67. doi: 10.13332/j.1000-1522.20150016
引用本文: 穆喜云, 张秋良, 刘清旺, 庞勇, 胡凯龙. 基于机载激光雷达的寒温带典型森林高度制图研究[J]. 北京林业大学学报, 2015, 37(7): 58-67. doi: 10.13332/j.1000-1522.20150016
MU Xi-yun, ZHANG Qiu-liang, LIU Qing-wang, PANG Yong, HU Kai-long. Typical forest height mapping in cold temperate zone using airborne LiDAR data[J]. Journal of Beijing Forestry University, 2015, 37(7): 58-67. doi: 10.13332/j.1000-1522.20150016
Citation: MU Xi-yun, ZHANG Qiu-liang, LIU Qing-wang, PANG Yong, HU Kai-long. Typical forest height mapping in cold temperate zone using airborne LiDAR data[J]. Journal of Beijing Forestry University, 2015, 37(7): 58-67. doi: 10.13332/j.1000-1522.20150016

基于机载激光雷达的寒温带典型森林高度制图研究

doi: 10.13332/j.1000-1522.20150016
基金项目: 

863”

国家高技术研究发展计划项目(2013AA12A302)、“

十二五”

国家科技支撑计划项目(2012BAH34B0203)、国家自然科学基金青年科学基金项目(41201334)、“

十二五”

国家科技支撑计划项目(2012BAD22B0204)

详细信息
    作者简介:

    穆喜云,博士生。主要研究方向:林业遥感。Email: xiyunmuyd@126.com 地址:100091 北京市海淀区颐和园后中国林业科学研究院资源信息研究所。

    责任作者:

    张秋良,教授,博士生导师。主要研究方向:森林经理、森林生态。 Email: 18686028468@163.com 地址:010018 内蒙古呼和浩特市内蒙古农业大学东区林学院森林经理教研室。

Typical forest height mapping in cold temperate zone using airborne LiDAR data

  • 摘要: 以内蒙古根河市潮查林场境内的寒温带兴安落叶松原始林及其次生林为研究对象,利用机载激光雷达点云数据与地面调查的66个样地数据,采用不同算法计算样地实测树高(Lorey's高、冠幅面积加权树高和算术平均高)分别与基于双正切角树冠识别算法获取的LiDAR估测高(冠幅面积加权树高、算术平均高)和基于点云提取的百分位高构建树高回归模型(冠幅面积加权树高模型、算术平均树高模型和LiDAR百分位树高模型)。对比不同树高模型的训练精度与估测精度的差异,探讨双正切角树冠识别算法对本研究区的适用性;同时了解冠幅面积加权的样地实测树高与Lorey's高对林分平均高代表性的差异,确定最优解释变量,筛选最优树高模型,计算研究区森林高度空间分布图,为后续生物量和碳储量研究提供参考数据。结果表明:样地冠幅面积加权树高的模型训练精度和估测精度与Lorey's高的结果一致性较好,略低于Lorey's高的估测结果。LiDAR百分位树高模型中的50%分位高与样地实测树高相关性显著且回归模型拟合效果较好,其中,以Lorey's高为样地实测树高时模型的R2=0.869、RMSE=1.366m;以冠幅面积加权树高为样地实测树高时模型的R2=0.839、RMSE=1.392m;Lorey's高的50%分位高模型的估测精度最高,各独立验证样本点估测精度均高于85%,平均估测精度为94.73%,最高估测精度可达99.78%,其中混交林平均估测精度(96.72%)高于针叶林的平均估测精度(93.58%)。因此,选择Lorey's高的50%分位高模型计算研究区的森林高度空间分布。

     

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出版历程
  • 收稿日期:  2015-01-16
  • 修回日期:  2015-01-16
  • 刊出日期:  2015-07-31

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