Comparison of the effects of variable spatial resolution on hyperspectrally based geologic mapping

Timothy Bowers

doi:10.1117/12.486059

23 September 2003 Comparison of the effects of variable spatial resolution on hyperspectrally based geologic mapping

Timothy Bowers

Proceedings Volume 5093, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery IX; (2003) https://doi.org/10.1117/12.486059
Event: AeroSense 2003, 2003, Orlando, Florida, United States

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.

Citation Download Citation

Timothy Bowers "Comparison of the effects of variable spatial resolution on hyperspectrally based geologic mapping", Proc. SPIE 5093, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery IX, (23 September 2003); https://doi.org/10.1117/12.486059

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KEYWORDS

Spatial resolution

Minerals

Associative arrays

Long wavelength infrared

Quartz

Short wave infrared radiation

Composites

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