Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jafrearsci.2005.10.009 |
Spectral analysis of ASTER data covering part of the Neoproterozoic Allaqi-Heiani suture, Southern Egypt | |
Qiu, F; Abdelsalam, M; Thakkar, P | |
通讯作者 | Qiu, F |
来源期刊 | JOURNAL OF AFRICAN EARTH SCIENCES
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ISSN | 1464-343X |
出版年 | 2006 |
卷号 | 44期号:2页码:169-180 |
英文摘要 | This paper examines the potential of ASTER data in mapping the geology of an and area in Africa using spectral analysis techniques. Equipped with a relatively broad spectral range, fine spatial resolution, and a large number of bands, ASTER data are especially attractive to many geological researchers in Africa, due to their open availability and associated minimal costs for academic use. The spectral analysis of an ASTER dataset covering part of the Neoproterozoic Allaqi-Heiani suture, Southern Egypt has demonstrated it to be more effective in detecting lithological units than traditional multispectral analysis procedures, such as the maximum likelihood classifier. The effectiveness of these spectral analysis techniques used in this study lies in their ability to compare a pixel spectrum with the spectra of known pure materials, extracted from the spectral endmember selection procedures, including minimum noise factor (MNF), pixel purity index (PPI) and n-dimensional visualization. Among the three spectral analysis algorithms employed, spectral angle mapping (SAM) and spectral feature fitting (SFF), produced accurate classifications that were close to the ground reference data. Linear spectral unmixing (LSU), although failing to achieve a satisfactory overall classification accuracy, demonstrated potential in depicting intercalation of layered rocks. It is concluded that these spectral analysis techniques have proven to be useful tools in geological mapping of the arid regions in Africa, with their abilities to capitalize on the enhanced spectral information of ASTER data. (c) 2005 Elsevier Ltd. All rights reserved. |
英文关键词 | ASTER data spectral analysis Allaqi-Heiani suture geological mapping |
类型 | Article ; Proceedings Paper |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E ; CPCI-S |
WOS记录号 | WOS:000236452300005 |
WOS关键词 | EASTERN-DESERT ; LANDSAT TM ; SPECTROSCOPY ; EVOLUTION ; IMAGES ; AREA |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/151807 |
作者单位 | (1)Univ Texas, Program Geog Informat Sci, Richardson, TX 75083 USA;(2)Univ Texas, Dept Geosci, Richardson, TX 75083 USA |
推荐引用方式 GB/T 7714 | Qiu, F,Abdelsalam, M,Thakkar, P. Spectral analysis of ASTER data covering part of the Neoproterozoic Allaqi-Heiani suture, Southern Egypt[J],2006,44(2):169-180. |
APA | Qiu, F,Abdelsalam, M,&Thakkar, P.(2006).Spectral analysis of ASTER data covering part of the Neoproterozoic Allaqi-Heiani suture, Southern Egypt.JOURNAL OF AFRICAN EARTH SCIENCES,44(2),169-180. |
MLA | Qiu, F,et al."Spectral analysis of ASTER data covering part of the Neoproterozoic Allaqi-Heiani suture, Southern Egypt".JOURNAL OF AFRICAN EARTH SCIENCES 44.2(2006):169-180. |
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