Allow "radian" as a possible value for the X/Y dimension units.

[magau]

adaguc-server/CCDFDataModel/CProj4ToCF.cpp

Line 52 in 9d4dd62

}else if(units.equals("rad")){

According with the Unidata udunits documentation for naming units, the value "rad" is used as a radiation unit for "absorbed dose".
Thus the value "rad" for radian unit shouldn't be used. Instead, the correct value should be "radian".
As one can see in the following doc:
https://www.unidata.ucar.edu/software/udunits/udunits-1/udunits.txt

Besides, the GDAL and the netcdf-java libraries are already supporting the "radian" units for the "geostationary" projection coordinates. This would make the things easier for the data providers that are using the "geostationary" projection, in order to build their netCDF files compatible with the most of the softwares. Including yours...

In order to solve this issue I'd suggest the value "radian" to be added as a possible value for the X/Y axis/coordinates unit. (The value "rad" also should be allowed, to keep retro-compatibility...)

Regards João