authority: folia
slug: bathymetry
name: Bathymetry
domain: ocean
subdomain: topography
authority_id: folia:bathymetry
aliases:
  - sea-floor-depth
  - water-depth
external_ids:
  cf_standard_name: sea_floor_depth_below_sea_surface
canonical_units: m
external_validations:
  cf:
    name: sea_floor_depth_below_sea_surface
    docs_url: https://cfconventions.org/Data/cf-standard-names/current/build/cf-standard-name-table.html
  product:
    id: gebco-2024
    docs_url: https://www.gebco.net/data_and_products/gridded_bathymetry_data/
  stac:
    extension: raster
    field: raster:bands
    docs_url: https://github.com/stac-extensions/raster
description: |
  Depth of the sea floor below the sea surface (or geoid), expressed
  as positive-down meters. Conceptually elevation underwater — the
  ocean analogue to a DTM. Flagship products: GEBCO 2024 (global
  15-arc-second grid), EMODnet Bathymetry (European seas, higher
  resolution), NOAA ETOPO 2022 (global ice-surface and bedrock).
  Used by coastal, marine-habitat, and tsunami-modelling ops.
theme: ocean
consumed_by: []
produced_by: []
demos: []
status: documented
sources:
  - https://www.gebco.net/data_and_products/gridded_bathymetry_data/
  - https://emodnet.ec.europa.eu/en/bathymetry
  - https://www.ncei.noaa.gov/products/etopo-global-relief-model
  - https://cfconventions.org/Data/cf-standard-names/current/build/cf-standard-name-table.html