[netcdf-java] Multiple missing values

[John Caron]

IMO, missing_value was likely incorrectly deprecated in the netcdf user guide, and CF incorrectly 
echoed that decision. Russ and I are reviewing that, and if we decide thats the case, we will 
correct the users guide and perhaps make a recommendation to CF.

Yes, nj library will recognize multiple missing_values.

BTW, with the advent of version 4, im starting to use "nj (and/or) cdm library" instead of "nj22". 
bad idea to use version numbers, since versions change!

Jon Blower wrote:
> missing_value is deprecated by CF in favour of _FillValue but I guess
> this is a legitimate use.  Will nj22 recognise these multiple values
> for missing_value?
> 
> Jon
> 
> On Wed, May 28, 2008 at 8:44 PM, John Caron <caron at unidata.ucar.edu> wrote:
>> The "missing_value" attribute allows multiple values. I prefer it over
>> _FillValue myself, but it may not be as widely recognized by apps.
>>
>> Jon Blower wrote:
>>> Hi all,
>>>
>>> Oops, sorry, I misunderstood something - looking at the CF document it
>>> seems that only one FillValue is allowed (not an array of values).
>>> This seems to be an issue with the source data, not with netcdf-java
>>> or CF.
>>>
>>> Cheers, Jon
>>>
>>> On Wed, May 28, 2008 at 10:41 AM, Jon Blower <jdb at mail.nerc-essc.ac.uk>
>>> wrote:
>>>> Hi all,
>>>>
>>>> Sorry if this question has been asked before, but we have a situation
>>>> where we have source NetCDF files that have two missing values (-1 and
>>>> -999).  Only one of these seems to be recognized by Java-NetCDF
>>>> (2.2.22) (using VariableEnhanced.convertScaleOffsetMissing(val)).  Is
>>>> there a way to have both of these values accepted as missing values?
>>>>
>>>> Mike Grant (cc-ed) can provide example data or CDL if required.
>>>>
>>>> Cheers, Jon
>>>>
>>>> --
>>>> --------------------------------------------------------------
>>>> Dr Jon Blower Tel: +44 118 378 5213 (direct line)
>>>> Technical Director Tel: +44 118 378 8741 (ESSC)
>>>> Reading e-Science Centre Fax: +44 118 378 6413
>>>> ESSC Email: jdb at mail.nerc-essc.ac.uk
>>>> University of Reading
>>>> 3 Earley Gate
>>>> Reading RG6 6AL, UK
>>>> --------------------------------------------------------------
>>>>
>>>
>>>
> 
> 
>