issue_comments: 405166458

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https://github.com/pydata/xarray/issues/2288#issuecomment-405166458 https://api.github.com/repos/pydata/xarray/issues/2288 405166458 MDEyOklzc3VlQ29tbWVudDQwNTE2NjQ1OA== 10050469 2018-07-16T07:23:53Z 2018-07-16T07:23:53Z MEMBER

Correct me if I'm wrong, but from the xarray side it would already be enough if there is a way in xarray to have a special crs attribute which is preserved by all operations. What the crs really is shouldn't bother xarray, and it can be specific to the downstream library [1]. With a crs and xarray's coordinates the geoloc can be sorted out in almost all cases, right?

The solution currently is to store crs as a scalar coordinate as mentioned above.

What could also be a possibility (without knowing how the internals would look like) is to have a registry of "special attributes" names which would always be preserved by xarray's operations. This registry would live in xarray and can be updated by downstream libraries and/or accessors. (xref: https://github.com/pydata/xarray/issues/1614 ).

[1] : my preference goes for a simple PROJ4 string 

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