| Title | La cartographie des formations géologiques en surface à l'aide de la télédétection |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Belanger, J R |
| Source | Geological Survey of Canada, Paper 87-20, 1988, 21 pages (1 sheet), https://doi.org/10.4095/125170  Open Access |
| Year | 1988 |
| Publisher | Energy, Mines and Resources Canada |
| Document | serial |
| Lang. | French |
| Media | paper; on-line; digital |
| File format | pdf |
| Subjects | surficial geology/geomorphology; geophysics; remote sensing; landsat |
| Released | 1988 11 01; 2016 02 02 |
| Abstract | The 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. |
| GEOSCAN ID | 125170 |
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