Hi all,
I'm not sure about this. If you search the standard_names, you don't
find any that include "count", do you? If not, then why does the CF
checker even look at the units attribute. It can't know what the units
should be. I suspect that the checker must raise an error whenever
units are missing, even though it's o.k. for them to be missing if the
quantity is dimensionless.
Best,
Karl
On 2/23/11 10:56 AM, Lowry, Roy K. wrote:
> Hi Karl,
> Christina's problem is because her usage of standard name modifier is
> changing the canonical units from those of the unmodified Standard
> Name. Only solutions I can see are either to omit the Standard Name
> from this channel or set up a new Standard Name for raw chorophyll as
> counts. The latter seems to me to be not be as easy as it sounds.
> Any other opinions?
> Cheers, Roy.
> ------------------------------------------------------------------------
> *From:* cf-metadata-bounces at cgd.ucar.edu
> [cf-metadata-bounces at cgd.ucar.edu] On Behalf Of Karl Taylor
> [taylor13 at llnl.gov]
> *Sent:* 23 February 2011 17:54
> *To:* cristina.tronconi at artov.isac.cnr.it
> *Cc:* cf-metadata at cgd.ucar.edu
> *Subject:* Re: [CF-metadata] help
>
> Hi Chritina,
>
> For dimensionless variables, you can either omit the units attribute
> or set it to "1". I don't understand why this error is raised. Did
> you assign a "standard_name" to CHL_count? If so, what did you assign?
>
> thanks,
> Karl
>
> On 2/23/11 6:48 AM, cristina.tronconi at artov.isac.cnr.it wrote:
>> Hello,
>> I have a problem. iN MY NETCDF FILE I define the CHL_count variable.
>> it is a dimensionless variable.
>> I used the "standard name modifier: COUNT" for the variable CHL.
>>
>> for IT I define: units="1" as indicated in the Appendix C of the
>> "cf-conventions1_4.pdf".
>>
>> but the cf checker gives me this error:
>>
>> ------------------
>> Checking variable: CHL_count
>> ------------------
>> ERROR (3.1): Units are not consistent with those given in the
>> standard_name table.
>>
>> WHAT SHOULD I PUT FOR THE ATTRIBUTE UNITS FOR THE CHL_COUNT VARIABLE?
>> IT IS DIMENSIONLESS!
>>
>> THANKS IN ADVANCE
>>
>> CRISTINA TRONCONI
>>
>>
>> -------------------------------------------------------------------
>> Cristina Tronconi
>> Istituto di Scienze dell'Atmosfera e del Clima - sezione di Roma
>> Consiglio Nazionale delle Ricerche
>> Via Fosso del Cavaliere 100
>> 00133 Roma, Italy
>> Tel: +39 06 49934342
>> cell: '39 349 1242954
>> Fax: +39 06 20660291
>> e-mail:cristina.tronconi at artov.isac.cnr.it
>>
>>
>> _______________________________________________
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>> CF-metadata at cgd.ucar.edu
>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>
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