dask.array as Coordinate variable

[jennakwon06]

Hi all,

I was wondering if it was possible to have coordinate variables be also Dask arrays?

I am working with pretty big datasets, where coordinates alone can be too big for memory, so I am wondering how I can achieve working with this.

Thanks!

[keewis]

sorry for the late reply, @jennakwon06.

At the moment, we rely on pandas.Index to provide the indexing functionality, so unfortunately having dask arrays as dimension coordinates is not possible. There are plans to eventually support custom indexes (e.g. dask.dataframe.Index) but there is still a lot to do (see #1603).

Note that although they are less useful, it is possible to have dask arrays in non-dimension coordinates.

[rabernat]

This is a duplicate of #1094.