build references for second matanzas dataset

matanzas2.py

url = "s3://prod-is-usgs-sb-prod-publish/609bf69ed34ea221ce39b261/breach_matanzas.nc"
from fsspec_reference_maker.hdf import *

so = dict(
    mode='rb', anon=True, requester_pays=True,
    default_fill_cache=False, default_cache_type='first'
    )
with fsspec.open(url, **so) as f:
    h5chunks = SingleHdf5ToZarr(f, url, xarray=True, inline_threshold=100)
    out = h5chunks.translate()
    
import json
json.dump(out, open("matanzas2.json", 'w'))

import xarray as xr
ds = xr.open_dataset("reference://",
    engine="zarr",
    backend_kwargs=dict(
        storage_options=dict(
            fo="matanzas2.json",
            remote_protocol="s3",
            remote_options={"anon": True}
        )
    )
)
ds.nbytes / 2**30
# 50.6GB