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Proceedings Paper

Comparison of the effects of variable spatial resolution on hyperspectrally based geologic mapping
Author(s): Timothy Bowers
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Paper Abstract

Research is being conducted into the usefulness of hyperspectral data for geologic mapping applications. Hyperspectral data provides a means of identifying surface mineralogy, which indicates lithology. The data analyzed for this work were collected by the HYDICE (VIS-SWIR) and SEBASS (LWIR) airborne imaging spectrometers. Airborne spectrometers can deliver 1-meter spatial resolution, which allows for detailed geologic maps to be created. However, the first operational satellite-based hyperspectral systems will not deliver this level of detail. Data sets of 5, 10, 20, and 30 meters were simulated by degrading the 1-meter airborne data by block averaging of pixels. Presented will be a comparison of the effects of these lower resolutions on endmember identification and resultant geologic mapping. The hyperspectral-derived maps are directly compared to the best available ground-based geologic maps as a means of understanding how spatial resolution translates into map scale. In general, the results indicate that while spatial detail is rapidly lost as resolution degrades, spectral detail tends to be retained, which allows for accurate moderate-scale mapping.

Paper Details

Date Published: 23 September 2003
PDF: 12 pages
Proc. SPIE 5093, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery IX, (23 September 2003); doi: 10.1117/12.486059
Show Author Affiliations
Timothy Bowers, Spectral Information Technology Applications Ctr. (United States)

Published in SPIE Proceedings Vol. 5093:
Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery IX
Sylvia S. Shen; Paul E. Lewis, Editor(s)

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