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Promote band-level coords to data var attributes for stackstac #37

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merged 1 commit into from
Apr 5, 2024
Merged

Promote band-level coords to data var attributes for stackstac #37

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1 change: 1 addition & 0 deletions tests/test_core.py
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@ def test_to_xarray_with_pystac_client_search_passes_kwargs_through(simple_search
def test_to_xarray_with_different_stacking_library(simple_search, stacking_library):
ds = to_xarray(simple_search, stacking_library=stacking_library)
assert isinstance(ds, xr.Dataset)
assert "band" not in ds.dims


def test_to_xarray_with_drop_variables_raises(simple_search):
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12 changes: 11 additions & 1 deletion xpystac/core.py
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Expand Up @@ -70,7 +70,17 @@ def _(
return odc_stac.load(items, **{"chunks": {"x": 1024, "y": 1024}, **kwargs})
elif stacking_library == "stackstac":
stackstac = _import_optional_dependency("stackstac")
return stackstac.stack(obj, **kwargs).to_dataset(dim="band", promote_attrs=True)
da = stackstac.stack(obj, **kwargs)
bands = {}
for band in da.band.values:
b = da.sel(band=band)
scalar_coords = {k: v.item() for k, v in b.coords.items() if v.shape == ()}
b = b.assign_attrs(
**{k: v for k, v in scalar_coords.items() if v is not None}
)
b = b.drop_vars(scalar_coords)
bands[band] = b
return xarray.Dataset(bands, attrs=da.attrs)


@to_xarray.register
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