Perhaps an easy way to use the existing cf-checker remotely would be
to make a temporary netcdf file with all header information but with a
subset of the data?
If the dimension variable were kept then the monotonic tests could be done.
A quick method would be to use a utility link nco or cdo to subset the
spatial and temporal variables.
This could be implemented in a bash or python script and then send to
a remote service via a http post/get request.
Etienne
On Wed, Feb 29, 2012 at 11:55 AM, Bentley, Philip
<philip.bentley at metoffice.gov.uk> wrote:
> Hi Stephen,
>
> I may well be wrong, but I suspect that one of the reasons - perhaps the
> main reason - why folks would like access to a stand-alone cfchecker
> utility is the large size of their netcdf files. (It's certainly the
> reason we use a local version.)
>
> As you know only too well (from CMIP5), most of the netcdf files we're
> dealing with these days run into the high 100s of MB or low GBs. It's
> not really practical to upload such files in order to perform a CF
> compliance check. At least not on more than a few files.
>
> I wonder, therefore, if a possible solution is to develop an alternative
> checker utility that operates not on the netcdf file itself, but rather
> on the header info output by the ncdump -h command. Generating and
> uploading those would be trivial by comparison.
>
> Off the top of my head (and having given it almost zero thought!) the
> only test that I can think of which examines the actual data values is
> the check for coord vars being monotonic. But I suspect there are others
> I'm unaware of.
>
> If nothing else, such a utility might have some value as a 'first pass'
> checker.
>
> Any mileage in this? Apologies if it's already done the rounds!
>
> Regards,
> Phil
>
>
>> -----Original Message-----
>> From: cf-metadata-bounces at cgd.ucar.edu
>> [mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of
>> stephen.pascoe at stfc.ac.uk
>> Sent: 29 February 2012 11:39
>> To: christopher.s.lynnes at nasa.gov; cf-metadata at cgd.ucar.edu
>> Subject: Re: [CF-metadata] machine-accessible CF compliance checker?
>>
>> Hi Christopher,
>>
>> Are you looking for a way to run the cfchecker locally or
>> submit checking requests to one of the websites in a script?
>>
>> I think both would be possible with a little help. ?The
>> cfchecker is now available on the Python Package Index at
>> http://pypi.python.org/pypi/cfchecker. ?It needs a little
>> help to work out of the box -- you need to configure UDUNITS
>> and the location of several CF XML files. ?It's on my
>> long-term TODO list to make this configuration easier.
>>
>> Also the CF-checker at BADC and NCAS-CMS has a very simple
>> HTTP interface that could be scripted.
>>
>> Cheers,
>> Stephen.
>>
>> ---
>> Stephen Pascoe ?+44 (0)1235 445980
>> Centre of Environmental Data Archival
>> STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot
>> OX11 0QX, UK
>>
>>
>> -----Original Message-----
>> From: cf-metadata-bounces at cgd.ucar.edu
>> [mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of
>> Lynnes, Christopher S. (GSFC-6102)
>> Sent: 28 February 2012 16:03
>> To: cf-metadata at cgd.ucar.edu
>> Subject: [CF-metadata] machine-accessible CF compliance checker?
>>
>> I know about the web sites where you use a form to upload
>> files to check CF compliance, but is there a service
>> somewhere that can be accessed by a script?
>> --
>> Dr. Christopher Lynnes ? ? NASA/GSFC, Code 610.2 ? ?phone:
>> 301-614-5185
>>
>>
>> _______________________________________________
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>> --
>> Scanned by iCritical.
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Received on Wed Feb 29 2012 - 08:12:03 GMT
