Physical Sciences and Mathematics Commons^™

Alteration Mineral Mapping With Aster Data By Integration Of Coded Spectral Ratio Imaging And Som Neural Network Model, Mohammad Hassan Tayebi, Majid Hashemi Tangestani, Robert Keller Vincent

Turkish Journal of Earth Sciences

This study applied coded spectral ratio imaging and a self-organizing map (SOM) neural network model for subpixel classification of Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data to map alteration minerals of the Masahim volcano, SE Iran. Spectra of samples were measured using a FieldSpec spectroradiometer, and were interpreted for finding key alteration minerals. Key minerals including sericite and kaolinite were selected. Thirty-six nonreciprocal spectral ratios of 9 ASTER reflective bands were created. Each spectral parameter (of 9 spectral bands and 36 spectral ratios) for the field and library mineral spectra was divided into deciles. Each decile of spectral …