The AWI Basemap (version 2025) is a global basemap for GIS applications or web map viewers. The map is a rendered and shaded RGB version of the General Bathymetric Chart of the Oceans (GEBCO) grid with the International Bathymetric Chart of the Arctic Ocean (IBCAO) and the International Bathymetric Chart of the Southern Ocean (IBCSO) as polar datasets and with ice overlays from Antarctic Digital Database (ADD), Global Land Ice Measurements from Space (GLIMS) and Greenland Ice Mapping Project (GIMP). It is available in three projections, EPSG:4326 for the global map as well as EPSG:3995 and EPSG:3031 for the polar stereographic versions. The map comes in three different color schemes to be used for different purposes.
This dataset comprises 125,514 submarine bathymetric features derived from the GEBCO_2025 Grid at 15 arc-second resolution (GEBCO Compilation Group, 2025) through computational analysis. Features were identified globally (excluding land areas) using topographic prominence calculation based on the algorithm of Kirmse and de Ferranti (2017), and characterized via isobath analysis. Each feature with prominence ≥300 m is represented as a polygon geometry with five nested contour levels (100%, 90%, 75%, 50%, and 25% from base to peak prominence level) and morphometric attributes including area, circularity, orientation, bounding box dimensions, and slope statistics. A companion point dataset contains all 143,888 detected peaks, including those rejected during quality control. The dataset provides an objective, reproducible global inventory of submarine features for research in marine geology, biodiversity, oeanography, and resource assessment. The attribute-rich structure enables users to define sub-classifications using standard SQL queries (e.g., filtering for seamounts using prominence ≥1000 m and circularity criteria). Data are distributed as OGC-compliant GeoPackage files. Processing was performed in 2025.