CGRG Bibliography of Canadian Geomorphology
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Author : Carbonneau, P.; Lane, S.; and Bergeron, N.
Date : 2001.
Title : Cost effective non-metric close range digital photogrammetry and its application to a study of coarse gravel river beds.
Publication : The Canadian Association of Geographers/l'association Canadienne des Géographes. 2001 Annual Meeting. 50th Anniversary of the CAG Jointly Organised by McGill University, Concordia University and Université de Montréal Tuesday May 29 – Sunday June 3, 2001
Issue :
Page(s) :
Abstract
Digital photogrammetry is now recognised as being a powerful tool in geomorphology. However, the high material costs and skills required by digital photogrammetry often deter non-photogrammetrists from using photogrammetry in their research. This paper demonstrates the use of a close range digital photogrammetric methodology accessible to non-photogrammetrists and yet capable of yielding good quality topographic information on coarse gravel riverbeds at minimal cost. Digital Elevation Models (DEMs), derived from 1:165 scale imagery, were obtained with a 35 mm film SLR camera, a commercial desktop scanner and a softcopy photogrammetry package. Quality assessment was based upon independent check points and scaling analysis, it showed that the resulting DEMs have sub-centimetre precision. Whilst photogrammetry is presently capable of a better data quality at this scale, quality must be judged with respect to the requirements of the geomorphological applications under consideration. Certain methodological simplifications are therefore acceptable in order to make photogrammetry cost effective and more accessible.
Bibliography of Canadian Geomorphology