Integrated visible and near-infrared, shortwave infrared, and longwave infrared full-range hyperspectral data analysis for geologic mapping
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Authors
Kruse, Fred A.
Subjects
hyperspectral data fusion
hyperspectral imaging
spectral geology
visible nearinfrared
shortwave infrared
longwave infrared
multimodal spectral mapping
northern Death Valley remote sensing
hyperspectral imaging
spectral geology
visible nearinfrared
shortwave infrared
longwave infrared
multimodal spectral mapping
northern Death Valley remote sensing
Advisors
Date of Issue
2015
Date
Publisher
Language
Abstract
Airborne visible/infrared imaging spectrometer (AVIRIS) and spatially coincident
hyperspectral thermal emission spectrometer (HyTES) data were used to map geology and alteration
for a site in northern Death Valley, California and Nevada. AVIRIS with 224 bands from 0.4
to 2.5 μm were converted to reflectance. HyTES data with 256 bands covering 8 to 12 μm were
converted to emissivity. Two approaches were investigated for integration of the datasets for full
spectrum analysis. A combined (integrated) bands method utilized 332 spectral bands spanning
both datasets. Spectral endmembers were extracted, and the predominant material at each pixel
was mapped for the full spectral range using partial unmixing. This approach separated a variety
of materials, but it was difficult to directly relate mapping results to surface properties. The
second method used visible to near-infrared, shortwave infrared, and longwave infrared data
independently to determine and map key endmembers in each spectral range. AVIRIS directly
mapped a variety of specific minerals, while HyTES separated and mapped several igneous rock
phases. Individual mapping results were then combined using geologically directed logical operators.
The full-range results illustrate that integrated analysis provides advantages over use of just
one spectral range, leading to improved understanding of the distribution of geologic units and
alteration.
Type
Article
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Series/Report No
Department
Physics
Organization
Naval Postgraduate School (U.S.)
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Citation
F. Kruse, "Integrated visible and near-infrared, shortwave infrared, and longwave infrared full-range hyperspectral data analysis for geologic mapping," Journal of Applied Remote Sensing, Vol. 9, 2015, 20 p.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.