Rugosity derived from gridded bathymetry of Farallon de Medinilla (FDM), Commonwealth of the Northern Mariana (CNMI), USA.

Rugosity is derived from gridded (5 m cell size) multibeam bathymetry, aboard NOAA Ship Oscar Elton Sette. Cell values reflect the (surface area) / (planimetric area) ratio for the area contained within that cell's boundaries. They provide indices of topographic roughness & convolutedness. The bathymetry grid includes multibeam bathymetry from the Reson 8101 multibeam sonar aboar the NOAA Ship Oscar E. Sette collected as of May 2010 by the NOAA Coral Reef Ecosystem Division in depths between 10 and 300 meters. These data complement multibeam data collected by the U.S. Naval Oceanographic Office at FDM during several test cruises, which are available from NOAA's National Geophysical Data Center.