[netcdf-java] Multiple missing values

John Caron caron at unidata.ucar.edu
Wed May 28 13:44:51 MDT 2008


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
>> --------------------------------------------------------------
>>
> 
> 
> 


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