Re: [netcdf-java] NetCDF-Java CF compliance

• To: Jacobs Tim <tim.jacobs@xxxxxxx>
• Subject: Re: [netcdf-java] NetCDF-Java CF compliance
• From: Sean Arms <sarms@xxxxxxxx>
• Date: Wed, 25 Nov 2015 10:38:23 -0700

Greeings Tim,

Good question. Typically users have a issues with netcdf-java and unsigned
ints, as Java does not have an unsigned int primitive type. However,
netcdf-java fully supports signed ints. For a list of supported datatypes,
checkout:

http://www.unidata.ucar.edu/software/thredds/v4.6/netcdf-java/CDM/DataType.html

It looks like the latest version of panoply is using the latest release of
netcdf-java (v4.6.3), so I do not see anything on the netcdf-java side that
could be an issue. netCDF-3 only uses signed types, so one quick way to
check panoply is to open a netcdf-3 from from a different dataset or source
and see if you can view any int fields.

I'd be more than happy to take a look at your specific file to see if
anything jumps out to me on the netcdf-java side.

Cheers,

Sean

On Wed, Nov 25, 2015 at 1:18 AM, Jacobs Tim <tim.jacobs@xxxxxxx> wrote:

> Dear Unidata colleagues,
>
>
>
> CF conventions are more restrictive than NetCDF regarding
>
> the data type used for the variables. CF for instance requires the use
>
> of signed integers. However, NASA’s Panoply, that uses NetCDF-java,
>
> cannot display variables with signed integer datatype, whereas changing
>
> to unsigned equivalent works fine.
>
> Can NetCDF be updated to accommodate also signed integers?
>
> Or is the problem in Panoply’s own code?
>
>
>
> Best regards,
>
> Tim Jacobs
>
>
>
> Remote Sensing Dept.
>
> VITO NV
>
> Boeretang 200
>
> 2400 Mol
>
> Belgium
>
> Tel: +32 14 336710
>
> Skype: jacobs.timmeke
>
>
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