ArcGIS Online has updated SEA DEPTH MAP

Basemap Ocean Service map or depth map contained in ArcGIS Online has been updated to include the General Bathymetric Chart of the Oceans GEBCO_08 grid and high-resolution bathymetry data from the

National Oceanic and Atmospheric adminstration (NOAA) National Geophysical Data Center (NGDC) specifically for the region the United States. Land area has also been updated using data from DeLorme.