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Title:

PRINCIPAL COMPONENT ANALYSIS FOR ALTERATION MAPPING

Accession Number:

00616729

Record Type:

Component

Availability:

American Society for Photogrammetry and Remote Sensing

5410 Grosvenor Lane, Suite 210
Bethesda, MD 20814-2160 USA

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Order URL: http://worldcat.org/issn/00991112

Abstract:

Reducing the number of image bands input for principal component analysis (PCA) ensures that certain materials will not be mapped and increases the likelihood that others will be unequivocally mapped into only one of the principal component images. In arid terrain, PCA of four TM bands will avoid iron-oxide and thus more reliably detect hydroxyl-bearing minerals if only one input band is from the visible spectrum. PCA for iron-oxide mapping will avoid hydroxyls if only one of the SWIR bands is used. A simple principal component color composite image can then be created in which anomalous concentrations of hydroxyl, hydroxyl plus iron-oxide, and iron-oxide are displayed brightly in red-green-blue (RGB) color space. This composite allows qualitative inferences on alteration type and intensity to be made which can be widely applied.

Corporate Authors:

American Society for Photogrammetry and Remote Sensing

5410 Grosvenor Lane, Suite 210
Bethesda, MD 20814-2160 USA

Authors:

Loughlin, W P

Pagination:

p. 1163-69

Publication Date:

1991-9

Serial:

Photogrammetric Engineering and Remote Sensing

Volume: 57
Issue Number: 9
Publisher: American Society for Photogrammetry and Remote Sensing
ISSN: 0099-1112

Features:

Figures; References; Tables

Old TRIS Terms:

Subject Areas:

Geotechnology; Highways

Files:

TRIS

Last Modified:

Sep 1 2003 12:00AM

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