Re: [CF-metadata] [cf-satellite] Sharing quality flags amongmultiple variables

2011-11-05 Thread Jonathan Gregory
Dear all Referring to Mike's comment. I agree that the ancillary_variables attribute indicates that the status_flag variable is associated with its data variable, and that alone identifies it to some extent, but (a) it doesn't specifically indicate its purpose, since there could be more than one

Re: [CF-metadata] [cf-satellite] Sharing quality flags amongmultiple variables

2011-11-02 Thread Thomas Lavergne
Dear all, I have a similar issue for my sea ice motion product, stored in netCDF. It is based on satellite data, but I do not think it really matters for the discussion. Like winds, currents, and other 2D vector quantity, my ice drift dataset is made of 2 variables. Be it distance/bearing,

Re: [CF-metadata] [cf-satellite] Sharing quality flags amongmultiple variables

2011-11-02 Thread Armstrong, Edward M (388M)
Hello, I vote for solution #1. Most elegant in my mind if the CF convention for attribute standard_name can be tweaked to accommodate multiple standard names (.e.g., such as a space separated list l ?) regards, On Nov 2, 2011, at 10:45 AM, Jonathan Gregory wrote: Dear Thomas et al. If

Re: [CF-metadata] [cf-satellite] Sharing quality flags amongmultiple variables

2011-11-02 Thread Upendra . Dadi
While the first solution is better in the case when several data variables have the same status flag, the second solution is better when there are several data variables each of which have a different status flag but same flag_values and flag_meanings. Can't we have both the solutions?

Re: [CF-metadata] [cf-satellite] Sharing quality flags amongmultiple variables

2011-11-02 Thread Mike Grant
Now I *think* I mostly understand the problem - thanks for the summary explanation, Jonathan, and apologies for the earlier missing-the-point :) However, I probably still need a bit more straightening out or have missed the point again.. I'd be grateful to understand more about why one needs a

Re: [CF-metadata] [cf-satellite] Sharing quality flags amongmultiple variables

2011-11-02 Thread Mike Grant
On 02/11/11 20:20, Mike Grant wrote: I'll put that in another email as this is already way too long and I suspect it's unworkable ;) Trying to address wanting different standard_names, shared or different flag_meanings and shared or different flag data.. Extend the idea in Jonathan's #2

Re: [CF-metadata] [cf-satellite] Sharing quality flags amongmultiple variables

2011-11-01 Thread Randy Horne
Hi all: a recap ... When Chris stated this morning: I don't want to speak for Randy, but I know it is quite common in Level 2 data from the Earth Observing System to have quality variables where there is a one-to-one match at the pixel level between a given quality variable and 1 or more

Re: [CF-metadata] [cf-satellite] Sharing quality flags amongmultiple variables

2011-11-01 Thread Randy Horne
Hi all: a recap ... When Chris stated this morning: I don't want to speak for Randy, but I know it is quite common in Level 2 data from the Earth Observing System to have quality variables where there is a one-to-one match at the pixel level between a given quality variable and 1 or more