期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2010
卷号：XXXVIII - Part 8
页码：628-630
出版社：Copernicus Publications
摘要：The site index, defined as stand height at a specific age (40 years in Japan), is used to assess forest productivity. We estimated the site index of Hinoki cypress (Chamaecyparis obtusa) for forest productivity using low-density airborne LiDAR. LiDAR data were acquired along a 20-km long (100-m wide transect in the eastern part of Shikoku Island at low density (1 pulse m -2 ) and with a small footprint (20 cm). Within the transect, we set plots that included non-forest, small forest, and large forest areas, and measured tree height. Laser pulses for use in a digital canopy height model were extracted for each plot, and the following LiDAR indexes were calculated: average, maximum, minimum, 10, 20 ... 90 percentiles, standard deviation, and coefficient of variation. A linear regression analysis was performed between the LiDAR indexes and stand height. Stand height had the strongest relationship with the LiDAR index for the first-pulse 80 percentile. We were able to estimate forest productivity in a large area using stand height from the LiDAR data, stand age for a forest GIS, and the site index equation
关键词：LiDAR; forest productivity; site index; Hinoki cypress (Chamaecyparis obtusa)
