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Global ocean + land terrain model (~15″). Best free bathymetry source for undersea levels, coastal games, and planet-scale heightmaps. Not for navigation.
[](https://tmhsdigital.github.io/Free-Game-Dev-Assets/entry/gebco/)
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Live Terms of use (2026-08-24): “The GEBCO Grid is placed in the public domain and may be used free of charge… Commercially exploit The GEBCO Grid… Users must: Acknowledge the source…”