Hi Bert and Jim, I think that it is now permitted to have the `axis` attribute on auxiliary coordinate variables (quite buried: sixth paragraph of http://cfconventions.org/Data/cf-conventions/cf-conventions-1.8/cf-conventions.html#coordinate-system), and it can be set on N-d auxiliary coordinate variables, too. So ``` float x(m,n) ; x:standard_name = "projection_x_coordinate" x:axis = "X" ``` is OK.
My understanding(?) is that the direction "vector component along the grid x-axis" in the standard name definition is indeed assuming that there is a `1-d` dimension coordinate variable of the form `float x(x) ;`, which you do not have. Are the component directions in your case defined as unrotated east and north? If so, then perhaps the standard_name `eastward_sea_water_velocity` is better, with the `x` and `y` auxiliary coordinate variables defined as you already have them? Thanks, David -- 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/252#issuecomment-602676651 This list forwards relevant notifications from Github. It is distinct from [email protected], 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 [email protected].
