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Re: [ferret_users] _Fillvalue and missing value

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.


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 ?


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