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[UDUNITS #ODA-678107]: Seeking list of recognized units

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  • Subject: [UDUNITS #ODA-678107]: Seeking list of recognized units
  • Date: Tue, 07 Jul 2020 17:18:45 -0600
Hello Catherine,

> I am trying to bring some of my colleague’s data products into compliance 
> with the CF standard, and am getting a lot of errors such as ‘Invalid units: 
> not recognized by UDUNITS”.  So, I am wondering where I can find the list of 
> units that are recognized so we can use them instead.

Does this help: 
<https://www.unidata.ucar.edu/software/udunits/udunits-current/doc/udunits/udunits2.html#Database>

> I did see an older thread from 2011 
> (https://www.unidata.ucar.edu/support/help/MailArchives/udunits/msg00821.html)
>  that provided a partial list, but I didn’t see an equivalent to “meters per 
> second square” or “DN”.  These are the two main units that are kicking up 
> errors, as well as “unitless”.

What's a "DN"?

The UDUNITS-2 parser can't yet handle "second squared" or things like "square 
meter".

> Which variants of “meters per second square” and “DN” should I be using?

The UDUNITS-2 parser should handle "meters per second per second".

> And, what is the proper way of dealing with a unitless quantity?

Ether the empty string ("") or the string "1".

> Should I delete the “units” attribute from that variable, or is there a 
> specific string to use for that situation?

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: ODA-678107
Department: Support UDUNITS
Priority: High
Status: Closed
===================
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