Coordinates attribute for the variables

[GeyerB]

Where should this feature be added?

Web Interface

Feature Description

It would be nice to get the attribute
coordinates = "clat clon" ;
with accompanying fields clon, clat:

        double clon(ncells) ;
                clon:standard_name = "longitude" ;
                clon:long_name = "center longitude" ;
                clon:units = "radian" ;
                clon:bounds = "clon_bnds" ;
        double clon_bnds(ncells, vertices) ;
        double clat(ncells) ;
                clat:standard_name = "latitude" ;
                clat:long_name = "center latitude" ;
                clat:units = "radian" ;
                clat:bounds = "clat_bnds" ;
        double clat_bnds(ncells, vertices) ;

Why is this feature needed?

For easy visualisation (psy-view) of the external data.

Additional Context

No response

[mjaehn]

As discussed with @drieg, this could be implemented in EXTPAR or psy-view (not Zonda related).

[stelliom]

Hi @GeyerB,

Could you let me know if the output data from this request contains what you require for the visualization. Note that clon_bounds and clat_bounds are called clon_vertices and clat_vertices, because this is how they seem to be named in the generated grid.

Cheers,
Mikael

[stelliom]

Actually, something is still not working. Let me check again.

[stelliom]

@GeyerB Ok, now it works, but I could not order the dimensions like in your example: (ncells, vertices). It's (vertices, ncells) at the moment. Is this a problem?

[GeyerB]

retval = nf90_def_var(ncid, "clat_vertices", NF90_REAL, [dimid_cell, dimid_nv], varid) is not delivering the right order?

[stelliom]

This is done a bit differently in EXTPAR. The CDI library is being used: vlistDefVar(vlistID, gridID, zaxisID, timeID). For some reason I couldn't make it work, but to be fair I also don't know this library, I will try again.