期刊名称：Archiwum Fotogrametrii, Kartografii i Teledetekcji
印刷版ISSN：2083-2214
出版年度：2008
卷号：18
语种：English
出版社：Main Board of Association of Polish Surveyors
摘要：The study was aimed at determining the utility of and to improve the understanding of the airborne laser scanning (ALS) technology in acquisition of selected parameters of canopy layers for individual trees and whole stands. This approach,based on ALS data (TopoSys fiber scanner; swing mode + optical line scanner),was compared with reference data drawn from a forest inventory (432 Scots pines). The study showed that: (1) the height of a single tree,as derived from ALS data,leads to underestimation (mean difference -0.90 m or +0.12 m depending on CHM generation algorithm);(2) the mean stand height was higher (+0.85 m) than the height recorded in the SILP database,which may result in underestimation of the timber volume in the entire Milicz forest district;(3) the stand mean height (understood as 95th percentile of the FE point cloud) was +0.46 m higher than the height recorded in the SILP inventory database;(4) it was possible to estimate the canopy base with 0.56 m overestimation;(5) the canopy length as measured during the forest inventory was +0.44 m lower compared to the ALS data (histogram analysis);(6) the homogeneity of a contemporaneous-pine stand is questionable. In a very near future,a new approach to the forest inventory,supported by ALS data,will be presented as a list of new parameters and guidelines.
其他摘要：Celem pracy byáo okreĞlenie przydatnoĞci i zaproponowanie rozwiązaĔ automatyzacji procesu okreĞlania wybranych parametrów taksacyjnych drzewostanów związanych z koronami drzew,w oparciu o dane z lotniczego skaningu laserowego (ALS). Analiza przydatnoĞci d
关键词：ALS;forest inventory;tree height;canopy base;canopy surface and volume
