The GEBCO_2024 Grid - a continuous terrain model of the global oceans and land.
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The GEBCO_2024 Grid is a global continuous terrain model for ocean and land with a spatial resolution of 15 arc seconds. In regions largely outside of the Arctic Ocean area, the grid uses as a base Version 2.6 of the SRTM15_plus data set (Tozer 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_2024 Grid represents all data within the 2024 compilation. The compilation of the GEBCO_2024 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_2024 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 (AWI), Germany; Pacific Ocean - hosted at the National Institute of Water and Atmospheric Research (NIWA), New Zealand; Atlantic and Indian Oceans - hosted at the Lamont-Doherty Earth Observatory (LDEO), Columbia University, USA; Arctic and North Pacific Oceans - jointly hosted at Stockholm University, Sweden and the Center for Coastal and Ocean Mapping at the University of New Hampshire, USA.
GEBCO_2024网格（GEBCO_2024 Grid）是一款覆盖全球的连续海陆地形模型，空间分辨率为15角秒。在北冰洋以外的大部分区域，该网格以SRTM15_plus数据集（SRTM15_plus data set）2.6版为基础数据源（Tozer等人，2019）。该数据集是陆地地形与实测及估算海底地形的融合产物。在此基础网格之上，叠加了由日本船舶振兴会-国际海底地形制图学会（General Bathymetric Chart of the Oceans, GEBCO）海底2030项目（Nippon Foundation-GEBCO Seabed 2030 Project）四个区域中心开发的网格化水深数据集。 GEBCO_2024网格收录了2024年整合的全部数据。该网格的整合工作由设于英国国家海洋学中心的Seabed 2030全球中心（Seabed 2030 Global Center）完成，旨在构建无缝衔接的全球地形模型。在极地以外的区域，各区域中心提供的数据集为稀疏网格格式，即仅填充包含实测数据的网格单元。此类数据集通过“移除-恢复”（remove-restore）融合流程叠加至基础网格：该流程分为两个阶段，首先计算新数据集与基础网格的差值，随后对差值进行网格化处理，再将差值叠加至现有基础网格，目标是在新数据与基础数据之间实现平滑过渡，同时尽可能降低对基础数据集的扰动。 以完整网格形式提供的数据集（主要覆盖北纬60°以北及南纬50°以南区域），则通过GlobalMapper软件的羽化融合（feather blending）技术叠加至基础网格。 GEBCO_2024网格由日本船舶振兴会-国际海底地形制图学会海底2030项目开发完成。该项目是日本船舶振兴会（Nippon Foundation）与国际海底地形制图学会（GEBCO）的合作项目，旨在汇集所有可用水深数据，于2030年前完成权威的全球海底地形图并向全球公开。 该项目由日本船舶振兴会资助，下设四个Seabed 2030区域中心：南大洋区域中心（设于德国阿尔弗雷德·魏格纳研究所，Alfred Wegener Institute, AWI）、太平洋区域中心（设于新西兰国家水与大气研究所，National Institute of Water and Atmospheric Research, NIWA）、大西洋与印度洋区域中心（设于美国哥伦比亚大学拉蒙特-多尔蒂地球观测站，Lamont-Doherty Earth Observatory, LDEO）以及北极与北太平洋区域中心（由瑞典斯德哥尔摩大学与美国新罕布什尔大学海岸与海洋绘图中心联合运营）。
