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TitleSpectral Unmixing Applied to Vegetated Environments in the Canadian Arctic for Mineral Mapping
DownloadDownloads (Preprint)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorStaenz, K; Nadeau, C; Secker, J; Budkewitsch, P
SourceXIXth ISPRS Congress and Exhibition, Amsterdam, July 15-23; 2000., Open Access logo Open Access
Alt SeriesEarth Sciences Sector, Contribution Series 20042847
Mediapaper; on-line; digital
File formatpdf
Released2000 01 01
AbstractThis paper shows preliminary results of mineral mapping under moderate tundra vegetation cover in an arctic environment. The data analysis including recalibration, atmospheric correction, automatic endmember extraction, and constrained linear spectral unmixing was applied to two hyperspectral image cubes acquired with the Probe-1 sensor over a test site in the Povungnituk Range in Northern Quebec, Canada. The mapping results indicate that different rock units (gabbro, basalt) could be identified successfully. However, the analysis also shows that the following factors impede the extraction of rock units: Lichen cover masks the reflectance of rock units, and sensor viewing angle and terrain influence the spectral signature (bidirectional reflectance). Ground reference information such as reference spectra of different target types, acquired during the data collection, were used to validate the unmixing results.

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