CGRG Bibliography of Canadian Geomorphology
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Author : Giles, P.T.; Chapman, M.A.; and Franklin, S.E.
Date : 1994
Title : Incorporation of a digital elevation model derived from stereoscopic satellite imagery in automated terrain analysis
Publication : Computers & Geosciences
Issue : 20(4):
Page(s) : 441-460
Abstract
A digital elevation model (DEM) was created from multispectral, stereoscopic SPOT (Systeme Probatoire d'Observation de la Terre) High Resolution Visible (HRV) satellite imagery using an automatic DEM generation program. The accuracy and use of this model was tested in automated terrain analysis of a moderate to high relief environment in southwest Yukon, Canada. An annual sum solar radiation calculation which incorporated a modification for horizon constraints was used in a classification of several subarctic terrain surfaces including four geomorphic process domains. Results of linear discriminant analysis indicated the potential to obtain classification accuracies for such surfaces that are comparable to those achieved using spectral data combined with DEMs created by digitizing 1:50,000 scale topographic maps or through stereoprocessing of medium-scale black and white metric aerial photographs. For example, multispectral SPOT HRV data alone provided an overall classification accuracy of 67.6%, which improved to 78.1% with the stereocorrelation variables of elevation, slope, and either solar radiation or incidence value. Additional improvements in accuracy may be possible through more complex image corrections, advanced image analysis techniques, or both
Bibliography of Canadian Geomorphology