Re: [thredds] Compression by Gathering working with Thredds?

On Dec 7, 2011, at 9:00 AM, Ethan Davis wrote:

> Hi Matthias,
> No, the underlying netCDF-Java library does not handle CF "compression
> by gathering". From this fairly recent (June 2011)  discussion on the CF
> mailing list
> it doesn't sound like it is used very widely. As suggested there, you
> might consider netCDF-4 chunking/compression instead. Which is handled
> by the netCDF-Java library and so by the TDS and ncWMS.

I'd like to second Ethan's suggestion to use netCDF 4's chunking/compression.

> Ethan
> On 12/7/2011 1:07 AM, Matthias Müller wrote:
>> Dear Thredds experts,
>> in order to save us some disk space and maybe increase the performance
>> of a Thredds/ncWMS server we are planning to apply "Compression by
>> Gathering" (CF Conventions 1.6, section 8.2) to our landuse and
>> land-bound climate datasets. Before adapting our data massaging routines
>> I would like to make sure that the results will be compatible with the
>> Thredds server.
>> Can you please comfirm that Thredds supports netCDF files that utilize
>> "Compression by Gathering"?
>> Thank you,
>> Matthias
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James Gallagher
jgallagher at

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