講演詳細

経営部門[Forest Management]

日付	ポスター発表
会場名	（学生ポスター賞の審査対象）
講演番号	P-086
発表題目	Estimating stand parameters of a 114-year-old Japanese larch plantation using UAV photogrammetry Estimating stand parameters of a 114-year-old Japanese larch plantation using UAV photogrammetry
要旨本文	An old-growth plantation is an iconic site that has great value. Assessing stand parameters is laborious and time-consuming in the field. Therefore, this case study aimed to estimate the stand parameters of a 114-year-old Japanese larch (Larix kaempheri) using UAV photogrammetry in Northern Japan. First, 3D point clouds and orthomosaic were generated through SfM technology from the imagery at two UAV altitudes, 80 m, and 120 m. Then, a canopy height model (CHM) was generated by subtracting LiDAR DTM from UAV DSM. We used a Shiny-based R package for individual tree detection (ITD), tree height (TH) and crown area (CA) from the CHM. We also used local maxima algorithm for ITD. Stand density, mean TH, and CA cover were estimated from ITD, TH and CA. Results of accuracy were tested using F-Score, R2 and RMSE against field data and manually delineated CA. The maximum height of CHM was 43.66 m and 44.21 m at the UAV flight 80 m and 120 m, respectively whereas the field maximum TH was 42.9 m.
著者氏名	○Karthigesu, Jeyavanan1 ・ Owari, Toshiaki2 ・ Hiroshima, Takuya1 ・ Tsuyuki, Satoshi1
著者所属	1The University of Tokyo ・ 2The University of Tokyo
キーワード	stand parameters, plantation, old stand, Japanese larch, UAV
Key word	stand parameters, plantation, old stand, Japanese larch, UAV