CDO

Hi,

I have a land dataset with a 1.0 degree resolution but need to remap it to 2.5 degree. It works fine so far with remain or remapbil. However I loose a good amount of data along the coastline as the adjacent grid cells contain NaN data. Consequently when remapping the first grid cell on land is NaN as well.
Is there a way to retain the data? Something like, that if half of the adjacent grid cells contain data, the calculations should be performed with them.
I've added plots of my data to make it better understandable. Remapnn is doing a bit better than remapbil in this case but still not satisfying.

This is the data in its original resolution

This is the data processed with remapbil to 2.5

This is the data processed with remapnn to 2.5

Thank you,
best regards,
David