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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Received on Wed Feb 29 2012 - 07:55:45 GMT
