issue_comments: 279101252

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https://github.com/pydata/xarray/pull/1260#issuecomment-279101252 https://api.github.com/repos/pydata/xarray/issues/1260 279101252 MDEyOklzc3VlQ29tbWVudDI3OTEwMTI1Mg== 1217238 2017-02-11T00:14:36Z 2017-02-11T00:14:36Z MEMBER

Getting optional coordinates is hard is because the current "backends" system in xarray was really only designed for handling netCDF-like libraries.

For example, every backend gets passed through xarray.conventions.decode_cf to use CF conventions to decode its data. You would actually need to add a "global attribute" specifying coords='lat lon' to set coordinates variables with this system.

One alternative would be to simply write a function for reading files with rasterio straight into xarray Dataset objects.

There are probably hacks that can get this working with data stores but this really calls out for the bigger refactor like https://github.com/pydata/xarray/pull/1087. 

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