Advances in hyperspectral processing for province- and continental- wide mineral mapping

R. D. Hewson, T. J. Cudahy, M. Caccetta, A. Rodger, M. Jones, C. Ong

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

2 Citations (Scopus)

Abstract

Comprehensive mapping of the mineral composition within North Queensland, Australia was recently undertaken using 25,000 km2 of airborne hyperspectral imagery. High spatial resolution, web-accessible, seamless, accurate maps of mineral abundances and physicochemistries, were delivered as part of a Queensland Geological Survey initiative. This required the development of pre-processing and mineral information extraction strategies that could be applied across a large number of individual flight lines within a diverse range of environments. This study demonstrated the successful use of spectral indices to target diagnostic reflectance absorption features associated with mineral abundances, composition and variations associated with crystalline or water bonding states. A multi-level series of masks, in a logical sequence, were applied to reduce possible ambiguities within image products. A new technique was also developed to compensate for variable vegetation cover, enabling the extraction of predominantly geological information (e.g. soil, outcrop, colluvium).

Original languageEnglish
Title of host publication2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings
Volume4
DOIs
Publication statusPublished - 1 Dec 2009
Externally publishedYes
EventIEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009: Earth Observation, Origins and Applications - University of Cape Town, Cape Town, South Africa
Duration: 12 Jul 200917 Jul 2009

Conference

ConferenceIEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009
Abbreviated titleIGARSS
CountrySouth Africa
CityCape Town
Period12/07/0917/07/09

Fingerprint

Minerals
mineral
Processing
airborne sensing
Geological surveys
colluvial deposit
Chemical analysis
geological survey
vegetation cover
Masks
reflectance
outcrop
spatial resolution
flight
Crystalline materials
Soils
province
Water
soil
water

Keywords

  • Hyperspectral
  • Mineral mapping
  • Spectral indices
  • Vegetation compensation

Cite this

Hewson, R. D., Cudahy, T. J., Caccetta, M., Rodger, A., Jones, M., & Ong, C. (2009). Advances in hyperspectral processing for province- and continental- wide mineral mapping. In 2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings (Vol. 4). [5417473] https://doi.org/10.1109/IGARSS.2009.5417473
Hewson, R. D. ; Cudahy, T. J. ; Caccetta, M. ; Rodger, A. ; Jones, M. ; Ong, C. / Advances in hyperspectral processing for province- and continental- wide mineral mapping. 2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings. Vol. 4 2009.
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Hewson, RD, Cudahy, TJ, Caccetta, M, Rodger, A, Jones, M & Ong, C 2009, Advances in hyperspectral processing for province- and continental- wide mineral mapping. in 2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings. vol. 4, 5417473, IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009, Cape Town, South Africa, 12/07/09. https://doi.org/10.1109/IGARSS.2009.5417473

Advances in hyperspectral processing for province- and continental- wide mineral mapping. / Hewson, R. D.; Cudahy, T. J.; Caccetta, M.; Rodger, A.; Jones, M.; Ong, C.

2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings. Vol. 4 2009. 5417473.

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

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AU - Cudahy, T. J.

AU - Caccetta, M.

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AU - Jones, M.

AU - Ong, C.

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AB - Comprehensive mapping of the mineral composition within North Queensland, Australia was recently undertaken using 25,000 km2 of airborne hyperspectral imagery. High spatial resolution, web-accessible, seamless, accurate maps of mineral abundances and physicochemistries, were delivered as part of a Queensland Geological Survey initiative. This required the development of pre-processing and mineral information extraction strategies that could be applied across a large number of individual flight lines within a diverse range of environments. This study demonstrated the successful use of spectral indices to target diagnostic reflectance absorption features associated with mineral abundances, composition and variations associated with crystalline or water bonding states. A multi-level series of masks, in a logical sequence, were applied to reduce possible ambiguities within image products. A new technique was also developed to compensate for variable vegetation cover, enabling the extraction of predominantly geological information (e.g. soil, outcrop, colluvium).

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KW - Spectral indices

KW - Vegetation compensation

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Hewson RD, Cudahy TJ, Caccetta M, Rodger A, Jones M, Ong C. Advances in hyperspectral processing for province- and continental- wide mineral mapping. In 2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings. Vol. 4. 2009. 5417473 https://doi.org/10.1109/IGARSS.2009.5417473