The GEBCO_2022 Grid is a global continuous terrain model for ocean and land with a spatial resolution of 15 arc seconds. In regions outside of the Arctic Ocean area, the grid uses as a base Version 2.4 of the SRTM15_plus data set (Tozer, B. et al, 2019). This data set is a fusion of land topography with measured and estimated seafloor topography. Included on top of this base grid are gridded bathymetric data sets developed by the four Regional Centers of The Nippon Foundation-GEBCO Seabed 2030 Project. The GEBCO_2022 Grid represents all data within the 2022 compilation. The compilation of the GEBCO_2022 Grid was carried out at the Seabed 2030 Global Center, hosted at the National Oceanography Centre, UK, with the aim of producing a seamless global terrain model. Outside of Polar regions, the Regional Centers provide their data sets as sparse grids i.e. only grid cells that contain data are populated. These data sets were included on to the base using a remove-restore blending procedure. This is a two-stage process of computing the difference between the new data and the base grid and then gridding the difference and adding the difference back to the existing base grid. The aim is to achieve a smooth transition between the new and base data sets with the minimum of perturbation of the existing base data set. The data sets supplied in the form of complete grids (primarily areas north of 60N and south of 50S) were included using feather blending techniques from GlobalMapper software. The GEBCO_2022 Grid has been developed through the Nippon Foundation-GEBCO Seabed 2030 Project. This is a collaborative project between the Nippon Foundation of Japan and the General Bathymetric Chart of the Oceans (GEBCO). It aims to bring together all available bathymetric data to produce the definitive map of the world ocean floor by 2030 and make it available to all. Funded by the Nippon Foundation, the four Seabed 2030 Regional Centers include the Southern Ocean - hosted at the Alfred Wegener Institute, Germany; South and West Pacific Ocean - hosted at the National Institute of Water and Atmospheric Research, New Zealand; Atlantic and Indian Oceans - hosted at the Lamont-Doherty Earth Observatory, Columbia University, USA; Arctic and North Pacific Oceans - hosted at Stockholm University, Sweden and the Center for Coastal and Ocean Mapping at the University of New Hampshire, USA.

Wave products from french SWIM instrument (height, direction, wavelength) and wind products from chinese SCAT scatterometer (wind speed and direction) on CFOSAT mission. Some meteorological variables sampled at the location of SWIM acquisitions are also distributed in dedicated files.

Emprise géographique correspondant aux conventions internationales pour la protection des mers (conventions dites des mers régionales) auxquelles la France est partie.

L'espace maritime français, d’une surface totale d’environ 10,2 millions de km² représente le deuxième espace maritime mondial derrière celui des États-Unis d'Amérique. Les Outre-mer correspondent à près de 96 % à ces espaces. L'espace maritime français concerne les eaux sous souveraineté française (eaux intérieures, mer territoriale) ainsi que les eaux sous juridiction française (zone économique exclusive). Ce produit a pour principal intérêt de fermer l'espace maritime français sur la base des délimitations maritimes françaises officielles (Shom, 2023) et de différentes limites terre-mer. Il est fourni à titre indicatif, seules les délimitations maritimes françaises telles que diffusées sur le portail national des limites maritimes - https://limitesmaritimes.gouv.fr/ - étant juridiquement opposables. Des associations ont été faites par ailleurs au niveau des attributs afin d'associer les espaces maritimes à différents libellés ou codes officiels en vigueur (IHO, ISO, INSEE, NUTS, FAO).