![]() Relative relief is a relatively new approach used to extract dune features from DEMs. The least cost path method proved to be time intensive due to data clipping however, this approach resulted in continuous geomorphic landscape features (e.g. A slope-inflection point approach revealed general trends for the dune crest, toe and shoreline. The manual delineation method was found to be very time intensive and subjective based on the user, while the convergence index approach was useful to easily identify the dune crest through maximum and minimum values. ![]() Manual delineation and the convergence index approach were used on the DEMs to extract the dune crest and dune toe. ![]() The beach and dunes were extracted from DEMs using multiple techniques based on published literature. The purpose of this research is to develop enhanced approaches to extracting dunes from a digital elevation model (DEM). Traditional methods for extracting the dune rely on subjective interpretation, profile smoothing, or arbitrary functions and parameters. dune toe, dune crest) are or how they can be extracted. Current literature does not provide a consistent definition of what the dune features (e.g. ![]() In order to understand how a dune responds to and recovers from a storm, it is important that we can first identify and differentiate the beach and dune from the rest of the landscape. Coastal dunes are landscape features which can absorb and mitigate erosion caused by elevated water levels during a storm. ![]()
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January 2023
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