The GEBCO_2026 Grid - a continuous terrain model for oceans and land at 15 arc-second intervals.
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The GEBCO_2026 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 and Southern Ocean areas, the grid uses as a base Version 2.8 of the SRTM15_plus data set. 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_2026 Grid represents all data within the 2026 compilation. The compilation of the GEBCO_2026 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_2026 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 Earth Sciences 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_2026网格（GEBCO_2026 Grid）是一款适用于海洋与陆地的全球连续地形模型，空间分辨率为15角秒（arc seconds）。在北极与南大洋以外的绝大多数区域，该网格以SRTM15_plus数据集（SRTM15_plus data set）的2.8版作为基础数据源。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，叠加了由日本海洋基金会-全球海洋水深总图（General Bathymetric Chart of the Oceans, GEBCO）Seabed 2030项目（Seabed 2030 Project）的四个区域中心所研发的网格化水深数据集（bathymetric data sets）。GEBCO_2026网格囊括了2026年版汇编中的全部数据。GEBCO_2026网格的汇编工作由设于英国国家海洋学中心（National Oceanography Centre）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。在极地以外区域，各区域中心提供的数据集为稀疏网格（sparse grids）格式，即仅填充包含实测数据的网格单元格。此类数据集通过“移除-恢复”（remove-restore）融合流程叠加至基础网格之上：该流程分为两个阶段，首先计算新数据集与基础网格之间的差值，再对差值进行网格化处理，最后将差值叠加至原有基础网格中，其目标是在新数据集与基础数据集之间实现平滑过渡，同时尽可能减小对原有基础数据集的扰动。以完整网格形式提供的数据集（主要为北纬60°以北与南纬50°以南区域），则通过GlobalMapper软件（GlobalMapper software）的羽化融合（feather blending）技术叠加至基础网格。GEBCO_2026网格由日本海洋基金会-全球海洋水深总图Seabed 2030项目研发而成，该项目是由日本海洋基金会与全球海洋水深总图（GEBCO）合作开展的国际计划，其目标是整合所有可获取的水深数据，力争在2030年前完成全球海底高精度地图，并向全社会公开。由日本海洋基金会资助的四个Seabed 2030区域中心分别为：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，设于新西兰地球科学局（Earth Sciences New Zealand）；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）；北极与北太平洋区域中心，则由瑞典斯德哥尔摩大学（Stockholm University）与美国新罕布什尔大学海岸与海洋绘图中心（Center for Coastal and Ocean Mapping at the University of New Hampshire）联合托管。
