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Implement zarr-extension handling #51

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Implement zarr-extension handling #51

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4cd308d
Start using zarr-extension
jsignell Aug 20, 2025
2044b6e
Remove zarr<3 error
jsignell Aug 21, 2025
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18 changes: 18 additions & 0 deletions tests/test_core.py
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Original file line number Diff line number Diff line change
Expand Up @@ -127,6 +127,24 @@ def test_to_xarray_zarr_with_open_kwargs_engine():
to_xarray(zarr_asset)


@requires_planetary_computer
def test_to_xarray_zarr_with_zarr_extension():
import planetary_computer as pc

catalog = pystac_client.Client.open(
STAC_URLS["PLANETARY-COMPUTER"], modifier=pc.sign_inplace
)
collection = catalog.get_collection("daymet-daily-hi")
assert collection is not None
zarr_asset = collection.assets["zarr-abfs"]

# pop off the xarray-assets extension fields
zarr_asset.extra_fields.pop("xarray:open_kwargs")
zarr_asset.extra_fields["zarr:consolidated"] = True

to_xarray(zarr_asset)


@pytest.mark.skip(reason="not yet supported with kerchunk >=0.2.8")
def test_to_xarray_with_item_collection_with_kerchunk_attrs_in_data_cube(
data_cube_kerchunk,
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10 changes: 8 additions & 2 deletions xpystac/core.py
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Expand Up @@ -175,9 +175,15 @@ def _(
if obj.media_type == pystac.MediaType.COG:
_import_optional_dependency("rioxarray")
default_kwargs = {**default_kwargs, "engine": "rasterio"}
elif obj.media_type == "application/vnd+zarr":
elif obj.media_type in ["application/vnd+zarr", "application/vnd.zarr"]:
_import_optional_dependency("zarr")
default_kwargs = {**default_kwargs, "engine": "zarr"}
zarr_kwargs = {}
if "zarr:consolidated" in obj.extra_fields:
zarr_kwargs["consolidated"] = obj.extra_fields["zarr:consolidated"]
if "zarr:zarr_format" in obj.extra_fields:
zarr_kwargs["zarr_format"] = obj.extra_fields["zarr:zarr_format"]

default_kwargs = {**default_kwargs, **zarr_kwargs, "engine": "zarr"}

href = obj.href
if patch_url is not None:
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