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TitleLa cartographie des formations géologiques en surface à l'aide de la télédétection
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorBelanger, J R
SourceGeological Survey of Canada, Paper 87-20, 1988, 21 pages (1 sheet), Open Access logo Open Access
PublisherEnergy, Mines and Resources Canada
Mediapaper; on-line; digital
File formatpdf
Subjectssurficial geology/geomorphology; geophysics; remote sensing; landsat
Released1988 11 01; 2016 02 02
AbstractThe interpretation of remote sensing data presents particular problems in geology since the spectral discrimination of phenomena does nor necessarily very according to the user's tapies. Sorne of these problems such as incomplete spectral signatures, gross pixel resolution, or atmospheric interference, are technical in nature and thus beyond the user's control. Other difficulties however can be caused by the approach or methods used to extract information from spectral data. The qualitative approach does not allow for the precise analysis of images whereas the quantitative approach, which is based on a mathematical discrimination of spectral signatures, rarely permits the establishment of a geological discrimination. The supervised methods of signature classification base discrimination only on field data which do not necessarily have an equivalent at the level of spectral discrimination; the establishment of themes using unsupervised methods, based on mathematical discrimination of signatures does not necessarily have a geological equivalent. This report uses an approach that is bath quantitative for image processing and qualitative for spectral class interpretation. Spectral classes are established using a semi-supervised classification, that is, signatures are grouped by taking in account spectral discrimination and user tapies. Three MSS Landsat scenes of the Eastern Townships of Quebec, Lake Kaminak in District of Keewatin, and King William Island in District of Franklin are used. It is preferable to combine approaches and methods of analysis and interpretation in order to adapt spectral discrimination to the geographic and geological context.

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