Follows the cycle 5 bathymetric map prepared by Rijkswaterstaat, Ministry of Infrastructure and the Environment, with two differences. 1) a few missing areas in the cycle 5 map were patched using earlier cycle maps of 2008 and 2003. 2) distance weighting interpolation for grid 10 (see benthos dataset for grid definitions) was used, based on the DGPS measurements recorded in this grid (see DGPS dataset). This grid was the only one in our study where DGPS measurements showed considerable deviations from the bathymetric map, such that correction was required.
