文献类型：期刊文献

英文题名：Extraction of ground surface elevation from ZY-3 winter stereo imagery over deciduous forested areas

作者：Ni, Wenjian[1] Sun, Guoqing[2] Ranson, Kenneth Jon[3] Pang, Yong[4] Zhang, Zhiyu[1] Yao, Wei[5]

第一作者：Ni, Wenjian

通信作者：Ni, WJ[1]

机构：[1]Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China;[2]Univ Maryland, Dept Geog Sci, College Pk, MD 20742 USA;[3]NASA, Goddard Space Flight Ctr, Biospher Sci Branch, Greenbelt, MD 20771 USA;[4]Chinese Acad Forestry, Inst Forest Resource Informat Tech, Beijing 100091, Peoples R China;[5]Tech Univ Munich, Inst Photogrammetry & Cartog, D-80333 Munich, Germany

年份：2015

卷号：159

起止页码：194-202

外文期刊名：REMOTE SENSING OF ENVIRONMENT

收录：;EI(收录号：20150300426548);Scopus(收录号：2-s2.0-85027948340);WOS:【SCI-EXPANDED(收录号:WOS:000352749000015)】；

基金：This work was supported in part by the National Basic Research Program of China (Grant No. 2013CB733404), and the National Natural Science Foundation of China (Grant Nos. 41471311, 41171283). This work was also supported in part by NASA's Earth Science Research Division and the Hundred Talents Program of the Chinese Academy of Sciences.

语种：英文

外文关键词：Dense deciduous forest; Forest height; Ground surface elevation; Stereo imagery; ZY-3; Photogrammetry

摘要：Forest height is an important indicator for forest biomass. Ground surface elevation is essential to derive forest height from spaceborne data including interferometric synthetic aperture radar or stereo imagery. Considering the good performance of stereo images in characterizing the vertical structure of forest with non-closed canopies, the main issue addressed in this study is whether stereo imagery acquired in winter can view the ground surface under dense deciduous forest. To make full use of information provided by different observation geometries, the three sets of matching points from different view were combined. Then the vertical distribution of matching points from stereo images was referenced to the vegetation vertical structure and the ground surface elevation from airborne laser scanner (ALS) data. The vertical distribution of matching points from stereo images over typical deciduous forest stands including sparse, disturbed and dense forests were examined. Most matching points were located on the ground surface while some points came from branches and trunks in all the three forest stands. This phenomenon was also observed from a transect of a digital surface model from ZY-3. Twelve elevation indices, including minimum, maximlim, mean elevations and an additional nine percentiles of cumulative probability (El 0 to E90) from the matching points of ZY-3 over 30 m x 30 m cell were compared with the ground surface elevation from ALS data. The results showed that E30 gave the best measurement of ground surface elevation with R-2 > 0.99 and RMSE = 2.54 m. (C) 2014 Elsevier Inc All rights reserved.