Global Bathymetry and Elevation Data at 30 Arc Seconds Resolution: SRTM30_PLUS

TLDR

The authors compiled and edited 298 million soundings from NOAA, SIO, NGA, JAMSTEC, IFREMER, GEBCO, and NAVOCEANO, combined land and ice topography from SRTM30 and ICESat, and applied a calibrated satellite‑gravity model to generate a 30‑arc‑second global bathymetry grid, which is available for download in the same format as the 33 SRTM30 tiles and with matching source‑identification tiles. A new 30‑arc‑second resolution global topography/bathymetry grid (SRTM30_PLUS) has been developed from a wide variety of data sources.

Abstract

A new 30-arc second resolution global topography/bathymetry grid (SRTM30_PLUS) has been developed from a wide variety of data sources. Land and ice topography comes from the SRTM30 and ICESat topography, respectively. Ocean bathymetry is based on a new satellite-gravity model where the gravity-to-topography ratio is calibrated using 298 million edited soundings. The main contribution of this study is the compilation and editing of the raw soundings, which come from NOAA, individual scientists, SIO, NGA, JAMSTEC, IFREMER, GEBCO, and NAVOCEANO. The gridded bathymetry is available for ftp download in the same format as the 33 tiles of SRTM30 topography. There are 33 matching tiles of source identification number to convey the provenance of every grid cell. The raw sounding data, converted to a simple common format, are also available for ftp download.