@snowman2 I am generally opposed to this proposal as it stands. If we want to adopt some sort of convention about this sort of thing, I suggest it be something like what I've written below.
For spatial coordinate systems, add an attribute named "fluffy" (this is a placeholder name — I'm unable to think of a good name yet) that will be added to each dimensional or auxiliary coordinate variable that declares the handedness of the coordinate system and declares which mathematical coordinate axis the variable is expressing. For a lat/lon/height coordinate reference system (CRS), the information contained in each attribute would be: * lat.fluffy - left-handed X * lon.fluffy - left-handed Y * height.fluffy - left-handed Z For a polar stereographic CRS, the information would be: * x.fluffy - right-handed X * y.fluffy - right-handed Y * height.fluffy - right-handed Z For a lat/lon/depth CRS, the information would be: * lat.fluffy - right-handed X * lon.fluffy - right-handed Y * depth.fluffy - right-handed Z The values of the attribute "fluffy" above are not intended as the actual words. I'm trying to express the information that is required, but I haven't thought of what precise words should be used. If the use of X, Y, and Z above is bothersome, feel free to refer to i, j, and k or first, second, and third instead. Some of the information may seem wrong at first glance. I was surprised when I discovered a few years ago that the lat/lon/height coordinate system is formally a left-handed coordinate system. I had just assumed that putting latitude first was "merely" a historical practice that wasn't prescriptive. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/cf-convention/cf-conventions/issues/247#issuecomment-593503888 This list forwards relevant notifications from Github. It is distinct from cf-metad...@cgd.ucar.edu, although if you do nothing, a subscription to the UCAR list will result in a subscription to this list. To unsubscribe from this list only, send a message to cf-metadata-unsubscribe-requ...@listserv.llnl.gov.
