hi:
I think I would also advocate adding another standard attribute,
something like "units_label" which would be a label for the units in a
plot, not necessarily udunit compliant.
eg:
var : units = "";
var : units_label = "milligrams per gram of dry sediment";
john
On 12/9/2011 2:09 AM, Lowry, Roy K. wrote:
> Hi Upendra,
>
> The Forel-Ule is another example where parameter semantics have been off-loaded in the units of measure, such as 'milligrams per gram of dry sediment'. I have been working to eliminate this by moving the semantics into the parameter description to leave a UDUNITS-compatible UoM.
>
> In BODC we have an equivalent to a Standard Name of 'Colour of the water body by visual estimation and conversion to a number on the Forel-Ule scale' which has units of dimensionless. This would require a new Standard Name were this approach to be used in CF.
>
> I'm guessing you want milliequivalents for total alkalinity data. Previously in CF the standard name 'sea_water_alkalinity_expressed_as_mole_equivalent' has been used with the canonical unit 'Moles per cubic metre', which is a pragmatic solution to your problem that works in the oceanographic domain because alkalinity is the only thing we encounter in Equivalents and luckily for us the chemistry is such that 1 Mole = 1 Equivalent.
>
> Cheers, Roy.
>
> -----Original Message-----
> From: cf-metadata-bounces at cgd.ucar.edu [mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of Steve Emmerson
> Sent: 08 December 2011 23:58
> To: Upendra Dadi
> Cc: cf-metadata at cgd.ucar.edu
> Subject: Re: [CF-metadata] udunits corresponding to Forel-Ule, milliequivalent
>
> Upendra,
>
> > From the perspective of the UDUNITS unit-packages, the unit "Forel-Ule"
> is the unit "Forel" multiplied by the unit "Ule" -- neither, of which,
> is known by the UDUNITS or UDUNITS2 packages. I suggest you contact the
> author.
>
> Regards,
> Steve Emmerson
>
> On 12/08/2011 09:05 AM, Upendra Dadi wrote:
>> Hi,
>> I have some data which has "Forel-Ule" for the units used. Is there a
>> udunits corresponding to this? Also, what should I use for
>> milliequivalent ? Thanks for the help.
>> Upendra
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Received on Fri Dec 09 2011 - 08:14:20 GMT
