Extend xarray.open_dataset to accept pystac objects
Project description
xpystac
xpystac provides the glue that allows xarray.open_dataset
to accept pystac objects.
The goal is that as long as this library is in your env, you should never need to think about it.
Example
Search collection of COGs:
import pystac_client
import xarray as xr
catalog = pystac_client.Client.open(
"https://earth-search.aws.element84.com/v1",
)
search = catalog.search(
intersects=dict(type="Point", coordinates=[-105.78, 35.79]),
collections=['sentinel-2-l2a'],
datetime="2022-04-01/2022-05-01",
)
xr.open_dataset(search, engine="stac")
Here are a few examples from the Planetary Computer Docs
import planetary_computer
import pystac_client
import xarray as xr
catalog = pystac_client.Client.open(
"https://planetarycomputer.microsoft.com/api/stac/v1",
modifier=planetary_computer.sign_inplace,
)
Read from a reference file:
collection = catalog.get_collection("nasa-nex-gddp-cmip6")
asset = collection.assets["ACCESS-CM2.historical"]
xr.open_dataset(asset)
ref: https://planetarycomputer.microsoft.com/dataset/nasa-nex-gddp-cmip6#Example-Notebook
Read from a zarr file:
collection = catalog.get_collection("daymet-daily-hi")
asset = collection.assets["zarr-abfs"]
xr.open_dataset(asset)
ref: https://planetarycomputer.microsoft.com/docs/quickstarts/reading-zarr-data/
Install
pip install git+https://github.com/stac-utils/xpystac
How it works
When you call xarray.open_dataset(object, engine="stac")
this library maps that open
call to the correct library.
Depending on the type
of object
that might be a stacking library (either
odc-stac or stackstac)
or back to xarray.open_dataset
itself but with the engine and other options pulled from the pystac object.
Prior Art
This work is inspired by https://github.com/TomAugspurger/staccontainers and the discussion in https://github.com/stac-utils/pystac/issues/846
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