NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Mineral identification and mapping of hydrothermal alteration zones using high-spectral resolution images (AVIRIS)High-spectral resolution images (AVIRIS) of the cuprite mining area were used to evaluate atmospheric calibration algorithms and test several mineral mapping techniques. Four scene normalization techniques were used: (1) the flat-field method, (2) the internal average reflectance method, (3) the empirical line method, and (4) the atmospheric absorption removal method (ATREM). The algorithms were evaluated in terms of their spectral interpret- ability and their ability to remove both solar irradiance and atmospheric absorption features, noise, and artifacts. Noise was quantified by calculating the coefficient of variation of the spectra, and spectral interpretability was quantified by calcu- lating a difference spectrum (eg, laboratory spectrum minus pixel spectrum) for areas with known occurrences of clay minerals. These difference spectra were useful in evaluating the degree of removal of atmospheric features. The empirical line method produced the best calibration results. Mineral mapping as done using (1) color-composites of bands on the shoulders and centers of expected absorption features, (2) color-coded spectra, and (3) spectral angle mapping.
Document ID
19950058695
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Van Der Meer, Freek D.
(ITC Enschede, Netherlands)
Date Acquired
August 16, 2013
Publication Date
June 1, 1994
Publication Information
Publication: ITC Journal
Issue: 2199
ISSN: 0303-2434
Subject Category
Earth Resources And Remote Sensing
Accession Number
95A90294
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available