[CF-metadata] CF-netcdf for Mercator projection - use lat/lon, or xc/yc plus lat/lon

2012-10-11 Thread Mark Mathewson Consulting
I have data that I'm putting into CF netcdf format (conventions 1.6) that is in the Mercator projection. I'm trying to determine which method is preferred for CF-compliance, in regard to the projection information. The basic question is: Since the Mercator projection is N-S-E-W, is there

[CF-metadata] Coordinate systems

2012-10-11 Thread Jim Biard
Hi. I mentioned I thought/concern I had about coordinate systems in CF as an aside a while back, and I didn't much response, so I'm writing it now as a standalone post. When I look at the way geographic coordinate systems are implemented in CF, I keep getting the feeling that the associations

Re: [CF-metadata] Choice of fill value for unpacked data

2012-10-11 Thread John Caron
On 10/10/2012 6:36 AM, Jim Biard wrote: John, I agree that there is no ambiguity in the original dataset. I was just pointing out a scenario in which the difficulty mentioned by Phil in his original post would manifest itself. The methodology referenced by Russ won't handle it. If you (for