Arid
DOI10.1117/12.2222770
Application of high resolution multispectral data for mapping blue ice areas in the Antarctic environment
Jawak, Shridhar D.; Luis, Alvarinho J.
通讯作者Jawak, Shridhar D.
会议名称Conference on Land Surface and Cryosphere Remote Sensing III
会议日期APR 04-07, 2016
会议地点New Delhi, INDIA
英文摘要

High resolution calibrated PAN-sharpened images from WorldView-2 (WV-2) were used for extracting blue ice areas in Schirmacher Oasis, east Antarctica. The Schirmacher oasis extends from 70 degrees 45 ' S to 70 degrees 75 ' S and 11 degrees 38 ' E to 11 degrees 38 ' E. Blue ice areas represents long-term ablation. The amplitude of blue ice is lower than that of snow, because the ice surface is smoother than the latter. But the difference is not so obvious when applying automatic extraction techniques. To achieve desirable results and support comparative analysis, multiband image combinations were generated from atmospherically-corrected WV-2 data. For feature extraction process, regions of interest (ROI) were considered in which blue ice was used as target and white snow/ice appearing on the blue ice was considered as non-target. Various semiautomatic feature extraction methods, such as, target detection, mapping methods, etc, and many trials were used for extracting blue ice areas. Surface patterns of alternating snow and blue ice bands were found in east Antarctica which becomes obstacle to clearly extract blue ice feature. From the high resolution WV-2 data, reference data (digitized data) were prepared for blue ice area. By comparing reference data and extracted data, bias and root mean square (RMS) error values were calculated. Accuracy assessment was done considering the entire necessary prior results of the blue ice area. Our results indicate that the pixel-based supervised classification methods yielded an overall accuracy ranging from 82%-89% for extraction of blue ice areas.


英文关键词Antarctic mapping pixel based classification methods object based methods
来源出版物LAND SURFACE AND CRYOSPHERE REMOTE SENSING III
ISSN0277-786X
出版年2016
卷号9877
EISBN978-1-5106-0118-5
出版者SPIE-INT SOC OPTICAL ENGINEERING
类型Proceedings Paper
语种英语
国家India
收录类别CPCI-S
WOS记录号WOS:000389680500039
WOS关键词CLASSIFICATION ; IMAGERY
WOS类目Remote Sensing ; Optics
WOS研究方向Remote Sensing ; Optics
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/305474
作者单位NCAOR, ESSO, Polar Remote Sensing Dept, Minist Earth Sci, Gama 403804, Goa, India
推荐引用方式
GB/T 7714
Jawak, Shridhar D.,Luis, Alvarinho J.. Application of high resolution multispectral data for mapping blue ice areas in the Antarctic environment[C]:SPIE-INT SOC OPTICAL ENGINEERING,2016.
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