issue_comments: 1054195542

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https://github.com/pydata/xarray/issues/6310#issuecomment-1054195542 https://api.github.com/repos/pydata/xarray/issues/6310 1054195542 IC_kwDOAMm_X84-1b9W 57705593 2022-02-28T12:13:46Z 2022-02-28T12:33:07Z CONTRIBUTOR

If you are interested in a fix, I would modify the following section: https://github.com/pydata/xarray/blob/613a8fda4f07181fbc41d6ff2296fec3726fd351/xarray/conventions.py#L726-L744 The variable_coordinates should be initialized for each variable v with the names in v.dims. Currently, the dimension names are explicitly excluded. So it seems to me like this behavior has originally been implemented on purpose because the main use of the coordinates attribute according to the CF convention is to list the auxiliary coordinates. However, the conventions also say: "Note that it is permissible, but optional, to list coordinate variables as well as auxiliary coordinate variables in the coordinates attribute." (https://cfconventions.org/cf-conventions/cf-conventions.html#coordinate-system)

So, this issue is about including the non-auxiliary coordinates by default because it's permissible in general, and it is even required for so-called "Discrete Sampling Geometries".

 
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