Fig. 5: Accuracy assessment of satellite-derived shoreline algorithms using Landsat imagery.

a Boxplots showing the horizontal error distributions for each SDS algorithm at each benchmark site across the selected transects. The value of the median bias is indicated and the whiskers are set at 1.5 times the inter-quartile range. Positive (negative) errors indicate a seaward (landward) bias. The error metrics describing each distribution are presented in Table 3. Note that the y-axis limits are increased for Truc Vert to accommodate its larger errors. b Coefficient of determination (R²) for each algorithm at each site. The surveyed MSL contour was used to evaluate the SDS time-series.