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Project Code [2020-sc-008]
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Project title
Extraction of Historic DEMs and Orthophotos using Digital Photogrammetry and its Applications in Coastal Evolution Studies
Primary Funding Agency
Geological Survey Of Ireland (GSI)
Co-Funding Organisation(s)
n/a
Lead Organisation
University College Dublin (UCD)
Project Abstract
It has been documented that shorelines along South-eastern Irish coast is eroding at an average rate of 3-0.5 m/year (OPW, 2010; Mathew et al., 2018). While two dimensional changes in shoreline position, based on mapping of aerial photographs have been commonly used, determination of volumes of sediment transport and detailed sediment budgets have been rare because of the difficulty and/or expense of obtaining elevational changes over substantial distances alongshore. Repeated lidar and UAV surveys permit changes in topography to be determined (e.g. impact of storms) on beach dune systems; however, this still leaves the problem of how to obtain historical data at a similar spatial scale. Advances in digital photogrammetry offers a relatively low-cost solution to this problem and the potential for construction of DEMs at a resolution like that of lidar and UAV. This investigation will test the viability of generating high resolution historic DEMs and Orthophotos from 1955, 1971 and 1995 aerial photos by scanning Film negatives at 4000 DPI. This proposal could be a pilot study for developing an integrated system of modelling shoreline change and sediment budgets that will integrate measurements in a range of spatial-temporal scales, which can be used for the entire Irish coastline
Grant Approved
�30,000.00
Research Theme
Relevant to other areas as well as climate
Initial Projected Completion Date
31/01/2022