This directory contains :
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NEMO.nc : this file contains the geographic coordinates of the center of the grid cell (plat, plon), as well as the geographic coordinates of all four corners of the grid (lat_corners, lon_corners). It also contains the cartesian coordinates of the corners (x_corners, y_corners, z_corners), and the angle between the grid y axis and a vector pointing north (ptheta), taken at the grid center.
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bathy_meter.nc
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coordinates.nc
These contain geographic coordinates of the center, center of upper edge, center of right edge, and upper right corner for each grid cell (tracer, u, v, and f points). These are named glamt/gphit, glamu/gphiu, glamv/gphiv, glamf/glphif, respectively.