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以平南县两景CBERS—02B影像为遥感数据源,提取CBERS—02B影像5个波段、植被指数的灰度值;利用研究区1∶10 000地形图提取海拔、坡度、坡向等GIS因子;以各遥感因子和GIS因子为自变量,研究区样地蓄积量为因变量,采用偏最小二乘法建立了森林蓄积量估测模型。结果表明:(1)CBERS—02B遥感影像5个波段,植被指数,郁闭度、海拔高、坡向、坡度等与蓄积量相关性不显著,且各因子之间存在明显的多重相关性;(2)运用偏最小二乘法建立的森林蓄积量估测模型,精度为85.44%,相对误差仅为-0.232%。研究结果为科学、准确、高效地估测森林蓄积量提供了理论依据和有效方法。 更多还原

【Abstract】 By taking the CBERS-02B image maps as the remote sensing(RS) resources,the gray values of five wave band and vegetation indexes were extracted;and elevation,slope aspect and other GIS factors were collected from the topographic map of forest resource inventory sample plots of Pingnan County in 2009;by means of partial least square,and adopting the RS and GIS factors as independent variables,and setting forest volume of sample plots in study region as dependent variable,the forest volume estimati... 更多还原