An improved Landsat Image Mosaic of Antarctica

查看全文 作　　者：HUI [1,2]FengMing;CHENG [1,2]Xiao;LIU [1,2]Yan;ZHANG [3]YanMei;YE [4]YuFang;WANG [1]XianWei;LI [5]Zhan;WANG [1,2]Kun;ZHAN [1,2]ZhiFei;GUO [1]JianHong;HUANG [1]HuaBing;LI [1,2]XiuHong;GUO [1]ZiQi;GONG [1]Peng

机构地区：[1]State Key Laboratory of Remote Sensing Science, Jointly Sponsored by Beijing Normal University and the Institute of Remote Sensing Applications of Chinese Academy of Sciences;[2]College of Global Change and Earth System Science, Beijing Normal University;[3]Institute of Earthquake Science, China Earthquake Administration;[4]Institute of Environmental Physics, University of Bremen;[5]Department of Geography & Environment, Boston University

出　　处：《Science China Earth Sciences》索引2013年第56卷第1期,共12页

基　　金：supported by Chinese Arctic and Antarctic Administration,National Basic Research Program of China (Grant No. 2012CB957704);National High-tech R&D Program of China (Grant Nos. 2008AA121702and 2008AA09Z117);National Natural Science Foundation of China(Grant Nos. 41106157 and 41176163);Open Fund of State Key Laboratory of Remote Sensing Science (Grant No. OFSLRSS201005) 摘　　要：A revised Landsat Image Mosaic of Antarctica (LIMA) is presented, using the 1073 multi-band scenes of the original Landsat-7 ETM+ LIMA image collection available at the United States Geological Survey (USGS: http://lima.usgs.gov/). Three improvements have been applied during the data processing: (1) DN saturation is adjusted by adopting a linear regression, which has a lower root mean square error than the ratio regression used by LIMA; (2) solar elevation angle is calculated using pixel-level latitude/longitude and the acquisition time and date of the central pixel of the scene, improving slightly upon the bilinear interpolation of the solar elevation angles of scene corners applied in LIMA; and (3) two additional image bands, Band 5 and Band 7, are sharpened using the panchromatic band (Band 8) and a Gram-Schmidt Spectral Sharpening algorithm to more easily distinguish snow, cloud and exposed rocks. The final planetary reflectance product is stored in 16-bit bands to preserve the full radiometric content of the scenes. A comparative statistical analysis among 12 sample regions indicates that the new mosaic has enhanced visual qualities, information entropy, and information content for land cover classification relative to LIMA. 关键词：图像拼接陆地卫星南极美国地质调查局土地覆盖分类线性回归像素水平均方根误差

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An improved Landsat Image Mosaic of Antarctica

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