data api · Global

GEBCO Bathymetry Data

GEBCO (General Bathymetric Chart of the Oceans) 2026 global bathymetric data in Cloud Optimized GeoTIFF (COG) format for GIS analysis and web mapping applications.

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What's in it

Data offered docs-verified: global elevation/bathymetry (Int16, metres) · TID source-type/quality grid (Int8) · sub-ice bedrock topography (Antarctica and Greenland)
Coverage docs-verified: Global (-180° to 180°, -90° to 90°)
Resolution docs-verified: ~450 m at the equator (15 arc-seconds)
Formats docs-verified: Cloud Optimized GeoTIFF (COG)
Access docs-verified: Public; no authentication stated in docs; released under the GEBCO Data License

Useful for

Use cases llm-inferred: Regional coastal and offshore context mapping of sea-floor depth for UK coastal flood or erosion screening (~450 m resolution) · Sub-regional terrain context for planning-stage screening where site LiDAR or DEM is not yet available · Sub-ice bedrock context for polar or glaciological consultancy work
Audience llm-inferred: GIS analysts · hydrologists · coastal engineers · planners · environmental consultants

Limitations

Constraints llm-inferred: ~450 m resolution is too coarse for site-scale civils, drainage or FRA modelling · TID grid is categorical and not suitable for terrain visualisation · Sub-ice layer shows bedrock beneath ice, not ice surface elevation · Web Mercator versions are clipped to ±85° latitude · Web mapping needs a tile server such as TiTiler; pre-generated terrain tiles are very large (65+ GB) · Citation DOI in the docs is an unfilled placeholder (doi:10.5285/XXX-XXX-XXX) · Maintained by an individual owner (Qiusheng Wu) rather than GEBCO directly, so update continuity is a maintenance risk

Licence: see product README
Authentication: Public; anonymous HTTPS/S3 access via data.source.coop
GitHub stars: Unknown
Last commit: Unknown
Last successful page check: 14/10/2026
Page health: page reachable
Package: Not recorded
Verification: Not independently verified

Provenance & evidence

Verified via Source Cooperative API /api/v1/products/giswqs (public product, updated 2026-07-12).

Metadata observed 14/10/2026 · research sweep: manual-2026-10-15 (source.coop)