GEBCO Global Bathymetry and Topography

<p>The Nippon Foundation-GEBCO <a href='https://seabed2030.org/' target='_blank'>Seabed 2030 project</a> has produced a global terrain model for ocean and land. The GEBCO_2023 grid was published in April 2023 and is the fifth GEBCO grid developed through The Nippon Foundation-GEBCO Seabed 2030 Project. This is a collaborative project between the <a href='https://www.nippon-foundation.or.jp/en/' target='_blank'>Nippon Foundation</a> of Japan and <a href='https://www.gebco.net/' target='_blank'>GEBCO</a>. The Seabed 2030 Project aims to bring together all available bathymetric data to produce the definitive map of the world ocean floor and make it available to all.</p> <p>The GEBCO_2023 Grid is a continuous, global terrain model for ocean and land with a spatial resolution of 15 arc seconds. Between latitudes of 50° South and 60° North it uses version 2.5.5 of the SRTM15+ dataset as a \"base\". This data set is a fusion of land topography with measured and estimated seafloor topography. This version of SRTM15+ is similar to version 2.1 [Tozer et al., 2019] but includes additional data sets. It uses predicted depths based on the V32 gravity model [Sandwell et al., 2019]. The SRTM15+ base grid has been augmented with the gridded bathymetric data sets developed by the four Seabed 2030 Regional Centers to produce the GEBCO_2023 Grid. <b>Note:</b> SRTM15+ V2.5.5 is also available through OpenTopography <a href='https://doi.org/10.5069/G92R3PT9' target='_blank'>here.</a><p>The information for ice-surface elevation and under-ice topography/bathymetry is taken from IceBridge BedMachine Greenland, Version 4.6 (Morlighem, M. et al. 2017) and data based on MEaSUREs BedMachine Antarctica, Version 2 (Morlighem, M. et al 2020).</p><p><b>NOTE:</b> This dataset includes ice sheet topography. For a version of the dataset with under-ice topography see \"GEBCO SubIceTopo\" below under \"Other Available Data Products\".</p>