CGRG Bibliography of Canadian Geomorphology
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Author : Epp, H.; and Beaven, L.
Date : 1988
Title : Mapping slope failure tracks with digital TM data
Publication : Proceedings of the 1988 International Geoscience and Remote Sensing Symposium; 12-16 September 1988, Edinburgh, Scotland.
Issue : 3:
Page(s) : 1649-1652
Abstract
The practice of intense localized clearcut logging has tended to exacerbate a strong natural tendency for gravitational slope movements to occur in weathered hillslope materials in the Queen Charlotte Islands, British Columbia, Canada. An attempt was made to identify and map the distribution of slope failures in the Rennel Sound area of southwestern Graham Island in the Queen Charlotte Islands through the use of digital Landsat Thematic Mapper (TM) data. Initially TM data of June 9, 1984 was geometrically corrected, resampled to 20 m, and visually compared to 1:10,000-scale color infrared photography flown in 1981. Principal component analysis, Martin Taylor enhancement, ratioing, contrast stretching and edge enhancement techniques were subsequently used to better delineate and identify the various occurrences of slope failure forms. Unsupervised and supervised classification algorithms were also used. A week was spent in the field assessing ground correlation with photographic and classified satellite hard-copy products. Approximately 60 percent of all slope failures could be discriminated from the TM data.
Bibliography of Canadian Geomorphology