NOAA National Geophysical Data Center Bathymetry & Global Relief Database

Find global bathymetry (ocean depth) and topography (land elevation) data from NOAA's National Geophysical Data Center. The database contains the global ETOPO1 1-minute relief database, gridded at approximately 100 square meters, US coastal relief and tsunami inundation models, multibeam bathymetry data, Lidar data, and more.