[Lin, Hui;Yan, Enping;Wang, Guangxing;Song, Renfei] Cent South Univ Forestry & Technol, Res Ctr Forestry Remote Sensing & Informat Engn, Changsha 410004, Hunan, Peoples R China.^[Wang, Guangxing] So Illinois Univ, Dept Geog, Carbondale, IL 62901 USA.