Hi all:
If the checker can read from opendap, then putting the files on an
opendap server might be helpful, in
that only the metadata is read instead of the entire file.
There are a few difference among servers (Hyrax, TDS, GDS, etc) but im
pretty sure this would work for
netcdf files well enough for the checker's needs. could be worth finding
out.
john
On 2/29/2012 7:55 AM, Bentley, Philip 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: [email protected]
[mailto:[email protected]] On Behalf Of
[email protected]
Sent: 29 February 2012 11:39
To: [email protected]; [email protected]
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: [email protected]
[mailto:[email protected]] On Behalf Of
Lynnes, Christopher S. (GSFC-6102)
Sent: 28 February 2012 16:03
To: [email protected]
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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