Friday, November 6, 2020

GEBCO bathymetry version 2020

Central to southern segment of the Mariana Trench.
The island of Guam is near the center of the image.
Why is this important?
This is the deepest trench on planet earth where there is an oceanic plate subducting under another oceanic plate (more commonly, denser oceanic plates subduct under less dense continental plates).
visiualization with the GeoGarage platform (UKHO nautical raster chart)

The latest 2020 GEBCO bathymetry dataset is impressive at 15 arc-seconds resolution.

Among the contributors, Crowd source bathymetry data provided by Olex (distributed in France by Magic Instinct Software, by the way developer of the GeoGarage platform)
These data are primarily single beam soundings collected by fishing vessels using the Olex acquisition system. The data are provided gridded at a resolution of 400x400 m.

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