CDO

Good morning
I am trying to display CORDEX datasets downloaded from an ESGF node, in latlong coordinates. The dataset contains both latlong and rotated coordinates. However, if I try to display the netCDF in a GIS the latlong coordinates seems not valid (in Arcgis, using the "Make NetCDF Raster Layer" reports an error of "One or both dimensions have variable spacing in their coordinate values"). I tried then to use the Setgrid command to set the grid to latlon. To get the grid template I used the griddes command and also looked at the sinfon results and setting parameters manually. Both of the method seems not to work fine, if I overlay the resulting netcdf with a country boundary (a shift of pixels is evident). The sinfon results is the following:

: points=25090 (193x130)
lon : 19.86421 to 115.5312 by 0.4179501 degrees_east
lat : -15.23163 to 45.25 by 0.4377272 degrees_north
mapping : rotated_latitude_longitude
rlon : -32.12 to 52.36 by 0.44 degrees
rlat : -21.56 to 35.2 by 0.44 degrees

I also calculated by hand the correct spacing of pixels I should enter dividing the range of coordinates with number of pixels:
gridtype = lonlat
gridsize = 25090
xsize = 193
ysize = 130
xfirst = 19.86421
xinc = 0.495684
yfirst = -15.23163
yinc = 0.465243

This result is actually the better but If I display the necdf with a country boundary I still see some pixels of shifts.

Can anyone explain (again) the logic to use the setgrid correctly?

Thanks!!

Gianluca