作者: Steen Magnussen , Thomas Nord-Larsen , Torben Riis-Nielsen
DOI: 10.1016/J.RSE.2018.04.015
关键词: Aboveground biomass 、 Forest resource 、 Physical geography 、 Estimator 、 Lidar 、 Estimation 、 Volume (thermodynamics) 、 Remote sensing 、 Environmental science 、 National forest 、 National forest inventory
摘要: Abstract National forest inventories (NFI) provide estimates of resources at the national and regional level but are also increasingly used as basis for mapping based on remotely sensed data. Such maps procure local may improve precision estimates. Supported by a countrywide airborne laser scanning (circa 2014) land-use map 2014), direct (DI), model-assisted (MA), model calibrated (MC) wood volume (V) aboveground biomass (AGB) densities in areas derived from Danish NFI (2012–2016) presented. Nonlinear models with three LiDAR metrics to predict V AGB forested areas. According these models, predicted values sample plots missed field inventory was lower than those visited field; we therefore opted estimation multiple (stochastic) imputations. MA country suggested 2% both errors 45% estimated DI results. MC were close an error approximately 40% yet 5% greater error. Multiple imputations had strongest impact estimates, only weak