Hi Patrick,Thanks, as ever, for your always-useful feedback. Some discussion of this point ...
Ferret should never "reject" units on axes. (If you have a case where it does, lets follow up on that example.) It should merely inform you that it does not how to perform conversions automatically on those units. Unit conversions are applied by Ferret to standardize the computation of derivatives and integrals along axes. Since the conversion of Z axis units between pressure units and depth/elevation units is data-dependent, Ferret cannot perform it in a general way.
One could imagine 2 tracks of convertibility for Z axis units -- depths convertible between (say) meters and centimeters; pressures similarly convertible among only pressure units. Are there use cases to motivate the effort of this change? (Or is the best solution merely to tone down the strength of the warning about non-convertible units?)
- Steve Brockmann Patrick wrote:
Hi all, Why Pa unit is not accepted as a pressure unit by ferret whereas it is well present in the file http://www.unidata.ucar.edu/software/udunits/udunits-1/udunits.txt Patrick