Characterization of ASTER GDEM elevation data over vegetated area compared with lidar data
文献类型：期刊论文
| 作者 | Ni, Wenjian1; Sun, Guoqing1; Ranson, Kenneth J.1 |
| 刊名 | INTERNATIONAL JOURNAL OF DIGITAL EARTH
 |
| 出版日期 | 2015 |
| 卷号 | 8期号:3页码:1520-1535 |
| 关键词 | stereo-mapping NED photogrammetry ASTER GDEM vegetation canopy height |
| 通讯作者 | Ni, WJ (reprint author), Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing, Peoples R China. |
| 英文摘要 | Current researches based on areal or spaceborne stereo images with very high resolutions (<1 m) have demonstrated that it is possible to derive vegetation height from stereo images. The second version of the Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model (ASTER GDEM) is the state-of-the-art global elevation data-set developed by stereo images. However, the resolution of ASTER stereo images (15 m) is much coarser than areal stereo images, and the ASTER GDEM is compiled products from stereo images acquired over 10 years. The forest disturbances as well as forest growth are inevitable in 10 years time span. In this study, the features of ASTER GDEM over vegetated areas under both flat and mountainous conditions were investigated by comparisons with lidar data. The factors possibly affecting the extraction of vegetation canopy height considered include (1) co-registration of DEMs; (2) spatial resolution of digital elevation models (DEMs); (3) spatial vegetation structure; and (4) terrain slope. The results show that the accurate coregistration between ASTER GDEM and national elevation dataset (NED) is necessary over mountainous areas. The correlation between ASTER GDEM minus NED and vegetation canopy height is improved from 0.328 to 0.43 by degrading resolutions from 1 arc-second to 5 arc-second and further improved to 0.6 if only homogenous vegetated areas were considered. |
| 研究领域[WOS] | Geography, Physical ; Remote Sensing |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000350032600002 |
| 源URL | [http://ir.ceode.ac.cn/handle/183411/38254]  |
| 专题 | 遥感与数字地球研究所_SCI/EI期刊论文_期刊论文 |
| 作者单位 | 1.[Ni, Wenjian] Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing, Peoples R China 2.[Ni, Wenjian 3.Sun, Guoqing] Univ Maryland, Dept Geog Sci, College Pk, MD 20742 USA 4.[Ranson, Kenneth J.] NASA, Goddard Space Flight Ctr, Biospher Sci Branch, Greenbelt, MD 20771 USA |
| 推荐引用方式 GB/T 7714 | Ni, Wenjian,Sun, Guoqing,Ranson, Kenneth J.. Characterization of ASTER GDEM elevation data over vegetated area compared with lidar data[J]. INTERNATIONAL JOURNAL OF DIGITAL EARTH,2015,8(3):1520-1535. |
| APA | Ni, Wenjian,Sun, Guoqing,&Ranson, Kenneth J..(2015).Characterization of ASTER GDEM elevation data over vegetated area compared with lidar data.INTERNATIONAL JOURNAL OF DIGITAL EARTH,8(3),1520-1535. |
| MLA | Ni, Wenjian,et al."Characterization of ASTER GDEM elevation data over vegetated area compared with lidar data".INTERNATIONAL JOURNAL OF DIGITAL EARTH 8.3(2015):1520-1535. |
入库方式： OAI收割
来源：遥感与数字地球研究所
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