Re: [ferret_users] _Fillvalue and missing value

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi Patrick,
If a variable coming from a netCDF file has only a _Fillvalue set, that 
value is copied into the internal missing-value flag for the variable, 
so it is not a problem for Ferret if your files have only a _Fillvalue 
attribute.

Ansley

Brockmann Patrick wrote:
> Hi all,
>
> How far ferret respects the CF convention (1.4) ?
>
> From 
> http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.4/cf-conventions.html#missing-data, 
> I read
> The |missing_value| attribute is considered deprecated by the NUG and 
> we do not recommend its use. However for backwards compatibility with 
> COARDS this standard continues to recognize the use of the 
> |missing_value| attribute to indicate undefined or missing data.
>
> Some of our output had now only the _Fillvalue attribut set (no more 
> missing value attribut), is that a problem to make calculations with 
> ferret ?
>
> Thanks
> Patrick