Journal
COMPUTERS & GEOSCIENCES
Volume 30, Issue 3, Pages 203-209Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cageo.2003.11.001
Keywords
digital elevation model; least-cost path; Dijkstra algorithm; mountain paths; physiology
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Footpaths in a mountainous area of Wales are modelled as least-cost paths between the start and end points. The cost function is defined on the basis of topography alone, and is defined in such a way that the cost penalty for excessively steep slopes is an adjustable parameter of the model. Least-cost paths are calculated by applying Dijkstra's algorithm to a Digital Elevation Model. Comparison of these calculated least-cost paths with existing footpaths suggests that the latter do not usually follow the least-time route, but instead optimise the metabolic cost for human locomotion. The method developed here is proposed as a means of exploring possible routes for new footpaths in mountainous areas. (C) 2004 Elsevier Ltd. All rights reserved.
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