Modify open_xr_dataset to read remote and local Kerchunk files

[agstephens]

• roocs-utils version: current
• Python version: current
• Operating System: current

Description

We'd like open_xr_dataset(...) to read Kerchunk files as well and existing NetCDF support.

Update:

https://github.com/roocs/roocs-utils/blob/master/roocs_utils/xarray_utils/xarray_utils.py#L69

And write some tests.

Details

Some examples of relevant code:

1. No authz:

import xarray as xr
import fsspec
import matplotlib.pyplot as plt

file_uri = "https://dap.ceda.ac.uk/neodc/esacci/snow/docs/esacci_snow_swe_v2_5.json"
mapper = fsspec.get_mapper("reference://", fo=file_uri)
ds = xr.open_zarr(mapper)

2. With authz:

https://github.com/cedadev/kerchunk-tools/blob/main/kerchunk_tools/xarray_wrapper.py#L24-L38

[agstephens]

Initial version implemented on branches:

https://github.com/roocs/daops/compare/enable-kerchunk?expand=1

https://github.com/roocs/roocs-utils/compare/i106-enable-read-kerchunk?expand=1