Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.rse.2015.10.031 |
Strengths and weaknesses of multi-year Envisat ASAR backscatter measurements to map permanent open water bodies at global scale | |
Santoro, Maurizio1; Wegmueller, Urs1; Lamarche, Celine2; Bontemps, Sophie2; Defoumy, Pierre2; Arino, Olivier3 | |
通讯作者 | Santoro, Maurizio |
来源期刊 | REMOTE SENSING OF ENVIRONMENT
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ISSN | 0034-4257 |
EISSN | 1879-0704 |
出版年 | 2015 |
卷号 | 171页码:185-201 |
英文摘要 | The mapping of water bodies at global scale has been undertaken primarily using multi-spectral optical Earth Observation data. Limitations of optical data associated with non-uniform and temporally variable spectral signatures suggested investigating alternative approaches towards a more consistent and reliable detection of water bodies. Multi-year (2005-2012) observations of SAR backscattered intensities at moderate resolution from the Envisat Advanced Synthetic Aperture Radar (ASAR) instrument were used in this study to generate an indicator of open permanent water bodies (SAR-WBI) for the year 2010 time frame and for all land surfaces excluding Antarctica and the Greenland ice sheet A first map of potential water bodies with a spatial resolution of 150 m was obtained with a global detection algorithm based on a set of thresholds applied to multi-temporal metrics of the SAR backscatter (temporal variability, TV, and minimum backscatter, MB). Local refinements were then used to reduce systematic commission and omission errors (4.6% of the total area mapped) due to the similarity of TV and MB over open water bodies and other land surface types primarily in cold and arid environments. The refinement rules are here explained by means of a detailed signature analysis of the SAR backscatter in such environments. The accuracy of the SAR-WBI was 80% when compared against 2078 manually interpreted footprints with a size of 150 x 150 m(2). Omission errors were primarily observed along coast- and shorelines whereas commission errors were associated with (i) ephemeral water bodies, (ii) seasonally inundated areas, and (iii) an incorrect choice of the local refinement. (C) 2015 Elsevier Inc All rights reserved. |
英文关键词 | Water body SAR Backscatter Envisat ASAR C-band Land cover |
类型 | Article |
语种 | 英语 |
国家 | Switzerland ; Belgium ; Italy |
收录类别 | SCI-E |
WOS记录号 | WOS:000366787600016 |
WOS关键词 | WIND SCATTEROMETER DATA ; C-BAND SAR ; SURFACE-WATER ; SIZE DISTRIBUTION ; LAND SURFACES ; SOIL-MOISTURE ; RADAR ; RESOLUTION ; LAKES ; RETRIEVAL |
WOS类目 | Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology |
WOS研究方向 | Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/190218 |
作者单位 | 1.GAMMA Remote Sensing, CH-3073 Gumlingen, Switzerland; 2.Catholic Univ Louvain, Earth & Life Inst, B-1348 Louvain, Belgium; 3.European Space Agcy, ESRIN, I-00044 Frascati, Italy |
推荐引用方式 GB/T 7714 | Santoro, Maurizio,Wegmueller, Urs,Lamarche, Celine,et al. Strengths and weaknesses of multi-year Envisat ASAR backscatter measurements to map permanent open water bodies at global scale[J],2015,171:185-201. |
APA | Santoro, Maurizio,Wegmueller, Urs,Lamarche, Celine,Bontemps, Sophie,Defoumy, Pierre,&Arino, Olivier.(2015).Strengths and weaknesses of multi-year Envisat ASAR backscatter measurements to map permanent open water bodies at global scale.REMOTE SENSING OF ENVIRONMENT,171,185-201. |
MLA | Santoro, Maurizio,et al."Strengths and weaknesses of multi-year Envisat ASAR backscatter measurements to map permanent open water bodies at global scale".REMOTE SENSING OF ENVIRONMENT 171(2015):185-201. |
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