Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL072874 |
A high-accuracy map of global terrain elevations | |
Yamazaki, Dai1; 39;Loughlin, Fiachra2 | |
2017-06-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; Ireland; England |
英文摘要 | Spaceborne digital elevation models (DEMs) are a fundamental input for many geoscience studies, but they still include nonnegligible height errors. Here we introduce a high-accuracy global DEM at 3 resolution (similar to 90 m at the equator) by eliminating major error components from existing DEMs. We separated absolute bias, stripe noise, speckle noise, and tree height bias using multiple satellite data sets and filtering techniques. After the error removal, land areas mapped with 2m or better vertical accuracy were increased from 39% to 58%. Significant improvements were found in flat regions where height errors larger than topography variability, and landscapes such as river networks and hill-valley structures, became clearly represented. We found the topography slope of previous DEMs was largely distorted in most of world major floodplains (e.g., Ganges, Nile, Niger, and Mekong) and swamp forests (e.g., Amazon, Congo, and Vasyugan). The newly developed DEM will enhance many geoscience applications which are terrain dependent. |
英文关键词 | digital elevation model SRTM AW3D ICESat global data set |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404382600067 |
WOS关键词 | RESOLUTION ; ASTER ; DYNAMICS ; COVER ; WATER |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28682 |
专题 | 气候变化 |
作者单位 | 1.Japan Agcy Marine Earth Sci & Technol, Dept Integrated Climate Change Project Res, Yokohama, Kanagawa, Japan; 2.Univ Tokyo, Inst Ind Sci, Tokyo, Japan; 3.Tokyo Inst Technol, Dept Civil & Environm Engn, Tokyo, Japan; 4.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa, Japan; 5.Univ Coll Dublin, UCD Sch Civil Engn, Dublin, Ireland; 6.Univ Bristol, Sch Geog Sci, Bristol, Avon, England; 7.SSBN, Bristol, Avon, England |
推荐引用方式 GB/T 7714 | Yamazaki, Dai,39;Loughlin, Fiachra. A high-accuracy map of global terrain elevations[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(11). |
APA | Yamazaki, Dai,&39;Loughlin, Fiachra.(2017).A high-accuracy map of global terrain elevations.GEOPHYSICAL RESEARCH LETTERS,44(11). |
MLA | Yamazaki, Dai,et al."A high-accuracy map of global terrain elevations".GEOPHYSICAL RESEARCH LETTERS 44.11(2017). |
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