Arid
DOI10.5194/isprsarchives-XL-7-W3-1375-2015
COMPARISON OF TWO SATELLITE IMAGING PLATFORMS FOR EVALUATING SAND DUNE MIGRATION IN THE UBARI SAND SEA (LIBYAN FAZZAN)
Els, A.; Merlo, S.; Knight, J.
通讯作者Els, A.
会议名称36th International Symposium on Remote Sensing of the Environment (ISRSE)
会议日期MAY 11-15, 2015
会议地点Berlin, GERMANY
英文摘要

Sand dunes can change location, form or dimensions depending on wind direction and strength. Sand dune movements can be effectively monitored through the comparison of multi-temporal satellite images. However, not all remote sensing platforms are suitable to study sand dunes. This study compares coarse (Landsat) and fine (Worldview) resolution platforms, specifically focussing on sand dunes within the Ubari Sand Sea (Libya). Sand dune features (crest line, dune ridge basal outlines) were extracted from Landsat and Worldview 2 imagery in order to construct geomorphic maps. These geomorphic maps were then compared using image overlay and differencing, and the Root Mean Squared Error (RMSE) was used to determine if the mapped dune patterns were significantly different. It was found that Landsat is a sufficient data source when studying dune patterns within a regional sand sea, but smaller dunes identified from Worldview data were not capable of being extracted in the data sourced from Landsat. This means that for studies concerned with the dune patterns and movements within sand seas, Landsat is sufficient. But in studies where the specific dynamics of specific dunes are required, a finer resolution is required; platforms such as Worldview are needed in order to gain more detailed insight and to link the past and present day climate and environmental change.


英文关键词Sand dunes Sahara Remote Sensing Libya Desertification Geomorphology
来源出版物36TH INTERNATIONAL SYMPOSIUM ON REMOTE SENSING OF ENVIRONMENT
ISSN2194-9034
出版年2015
卷号47
期号W3
页码1375-1380
EISBN*****************
出版者COPERNICUS GESELLSCHAFT MBH
类型Proceedings Paper
语种英语
国家South Africa
收录类别CPCI-S
WOS记录号WOS:000380531900204
WOS关键词DESERT ; TRANSPORT
WOS类目Environmental Sciences ; Geography, Physical ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向Environmental Sciences & Ecology ; Physical Geography ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/303960
作者单位Univ Witwatersrand, Sch Geog Archaeol & Environm Studies, Private Bag 3, ZA-2050 Johannesburg, South Africa
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Els, A.,Merlo, S.,Knight, J.. COMPARISON OF TWO SATELLITE IMAGING PLATFORMS FOR EVALUATING SAND DUNE MIGRATION IN THE UBARI SAND SEA (LIBYAN FAZZAN)[C]:COPERNICUS GESELLSCHAFT MBH,2015:1375-1380.
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