Estimating Canopy Information in Cryptomeria japonica and Chamaecyparis obtusa Stands using Airborne LiDAR, Data
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概要
- 論文の詳細を見る
Crown density control is one of the main activities in forest management. For the prediction of tree growth, it is important to consider the crown length, leaf biomass, and other canopy parameters as a photosynthetic organ. We estimated the lengths of canopies on the basis of a Digital Surface Model (DSM) and Digital Elevation Model (DEM) obtained from airborne Light Detection and Ranging (LiDAR) data and examined the accuracy of the estimates in even-aged stands. Cryptomeria japonica and Chamaecyparis obtusa stands were selected for analysis. The study site was the University Forest in Chiba, Japan, which is managed by the University of Tokyo and has stand densities between 350 and 4,000 trees ha^<-1>. First, we calculated the DSM and DEM for the University Forest in Chiba for the analysis of canopy information. We established 12 circular sample plots in Cryptomeria japonica and Chamaecyparis obtusa stands and measured the crown length of the dominant trees in each plot. Second, we estimated the crown length of the dominant trees in each plot using the DSM and DEM obtained from airborne LiDAR data. Finally, we compared crown lengths obtained from airborne LiDAR data with crown lengths obtained from ground surveys and checked the accuracy of this methodology. The crown lengths obtained from airborne LiDAR data were highly correlated with those obtained from ground surveys (coefficient of determination=0.95; root mean square error (RMSE)=0.67). Thus, airborne LiDAR accurately measured crown length, regardless of stand density.
- 森林計画学会の論文
著者
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FURUYA Naoyuki
Forestry and Forest Products Research Institute
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Hirata Yasumasa
Shikoku Research Center Forestry And Forest Products Research Institute
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Tatsuhara Satoshi
Graduate School Of Agricultural And Life Sciences The University Of Tokyo
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Nakajima Tohru
Graduate School Of Agricultural And Life Sciences The University Of Tokyo
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Takezoe Katsutoshi
Graduate School of Agricultural and Life Sciences, the University of Tokyo
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Suzuki Makoto
University Forest in Chiba, Graduate School of Agricultural and Life Sciences, the University of Tok
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Takezoe Katsutoshi
Graduate School Of Agricultural And Life Sciences The University Of Tokyo
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Suzuki Makoto
University Forest In Chiba Graduate School Of Agricultural And Life Sciences The University Of Tokyo
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Hirata Yasumasa
Forestry And Forest Products Res. Inst. Tsukuba Jpn
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Furuya Naoyuki
Japan International Res. Center Of Agricultural Sci. Tsukuba Jpn
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