CGRG Bibliography of Canadian Geomorphology
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Author : Giles, P.
Date : 2004.
Title : Characterizing coastal dune blowouts on Prince Edward Island using remote sensing imagery.
Publication : 2004 Annual Meeting of the Canadian Association of Geographers. Tuesday, May 25 – Saturday, May 29, 2004. Jointly organised by Université de Moncton and Mount Allison University. Moncton, New Brunswick.
Issue :
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Abstract
As part of a research project assessing the utility of various types of remote sensing imagery for examining coastal sand dunes, a study was conducted to focus on the distribution and characteristics of dune blowouts on the north shore of Prince Edward Island. Blowouts were identified in remote sensing imagery on a computer monitor using an image processing and display program, and the interpretations were compared with field observations and measurements. Certain imagery contained sufficient detail to describe the presence, plan morphology, dimensions, and orientation of most blowouts, but some initial image interpretations of finer details were corrected by direct field observation. CASI imagery with 2m pixels was judged to have sufficient spatial resolution to portray blowout features, with the advantage of having multispectral layers in comparison to the single layer, black-and-white nature of aerial photographs or IKONOS panchromatic imagery. A summary of blowout characteristics within the study area, based on image interpretation supported by field verification, was compiled. Morphological characteristics of blowouts in LIDAR data were also compared with cross-section profile surveys to assess whether LIDAR provided an adequate level of accuracy for three-dimensional studies of dunes, and the results were promising. Therefore, LIDAR combined with suitable remote sensing imagery would provide a powerful tool for research and modeling of dynamic coastal sand dunes, as changes in morphology and surface cover could be studied over time.
Bibliography of Canadian Geomorphology