The hotspot effect in heterogeneous vegetation canopies and performances of various hotspot models
作者： Wenhan Qin , Narendra S. Goel , Bingquan Wang
DOI: 10.1080/02757259609532323
关键词: Geography 、 Computer graphics 、 Hybrid model 、 Homogeneous 、 Hotspot (geology) 、 Remote sensing 、 Principal plane
摘要: In an earlier paper (Qin and Goel, 1995), we reviewed various analytical hotspot models evaluated them for homogeneous vegetation canopies by comparing against Diana—a computer graphics, radiosity based, model. this paper, complete their evaluation studying the effect of heterogeneous (trees crops). For purpose, first describe a graphics based method with which cross‐correlation (or overlap) function that drives can be accurately evaluated. We find all models, more or less, overestimate tree canopies. Except hybrid model, they perform worse in principal cone (PC) than plane (PP); big leaves at low LAI small spacing high large spacing. investigate detail elements heterogeneity (spacing distance between trees/plants, mutual shadowing crowns, crown por...
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