> We could modify this to: > "Allowed for auxiliary coordinate variables but not allowed for coordinate > variables. Missing data is only permitted in auxiliary coordinate varirables > only at points where the data variable(s) concerned has missing data."
I would support this, I think there are use cases where missing data at the 'same location' in the data array and an auxiliary coordinate array is valid and sensible. Rich's case is clearly valid. I have a couple more which I can illustrate in further detail as we pursue this requirement. mark ________________________________________ From: CF-metadata [[email protected]] on behalf of Signell, Richard [[email protected]] Sent: 18 February 2014 21:01 To: Gregory, Jonathan Cc: CF metadata Subject: Re: [CF-metadata] How to handle a forecast model with non-monotonic coordinate variables Jonathan, In the very last comment in ticket #85 (https://cf-pcmdi.llnl.gov/trac/ticket/85) you say: "In the "Description" column of Appendix A, in the entries for _FillValue andmissing_value, replace "Not allowed for coordinate data except in the case of auxiliary coordinate varibles in discrete sampling geometries." with "Allowed for auxiliary coordinate variables but not allowed for coordinate variables." This would seem to allow missing values in auxilliary coordinates for grid datatypes, which is what we need for the use case I presented. We could modify this to: "Allowed for auxiliary coordinate variables but not allowed for coordinate variables. Missing data is only permitted in auxiliary coordinate varirables only at points where the data variable(s) concerned has missing data." Thanks, Rich _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
