iBluff: An open-source R package for geomorphic analysis of coastal bluffs/cliffs

The R package iBluff is designed for coastal bluffs/bluffs morphological analysis and offers an automatic reproducible alternative to identify bluff edges using a bare earth digital elevation model (DEM) instead of hand digitizing. This extracts profiles along automatically identified transects on the bluff-face, top, toe, secondary inflections, relative concavity/convexity beach dunes (crests troughs). requires at minimum DEM as raster generalized line shapefile (shoreline) approximately parallel with bluff-face. Both files should be in same projected coordinate system. was developed expand generalize studies high-relief areas, investigate erosion seasonality, could extended use three-dimensional (3D) point-cloud data DEM.