Bathymetry

Bathymetry
  • Credit:

    Imagery by Jesse Allen, NASA's Earth Observatory, using data from the General Bathymetric Chart of the Oceans (GEBCO) produced by the British Oceanographic Data Centre.

Bathymetry is a digital image of the undersea land surface and water depth. Bathymetry is the underwater equivalent of land topography. In the maps provided here, shading indicates changes in slope or depth. Much of the data on ocean bathymetry come from "soundings." To collect a sounding, scientists use sonar devices to emit a sound wave that passes into the water. By measuring how long it takes the sound wave to bounce off the ocean floor and return to the sonar, scientists can estimate the depth of the water. Other characteristics of the returned sound wave can help reveal the shape and size of features on the sea floor.

These images represent ocean depths between -8000m and 0m (surface). Land regions are black in the colored versions. The full resolution of these images has been broken up into tiles as listed below. To understand the naming scheme please read about our global image grid.

Images & Animations

File

File Dimensions

  • JPEG
  • 3600x1800
  • JPEG 2 MB
  • 21600x10800
  • PNG 33 MB
  • 10800x10800
  • GeoTIFF 31 MB
  • 10800x10800
  • GeoTIFF 42 MB
  • 10800x10800
  • GeoTIFF 33 MB
  • 10800x10800
  • GeoTIFF 33 MB
  • 10800x10800
  • GeoTIFF 13 MB
  • 10800x10800
  • GeoTIFF 35 MB
  • 10800x10800
  • GeoTIFF 30 MB
  • 10800x10800
  • GeoTIFF 36 MB

Metadata

  • Visualization Date:

    July 21, 2005
  • Sensor(s):

    In situ Measurement
Share
NASA - National Aeronautics and Space Administration