Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1117/12.2222770 |
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 |
ISSN | 0277-786X |
出版年 | 2016 |
卷号 | 9877 |
EISBN | 978-1-5106-0118-5 |
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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