Create a project and product¶

import pystac
from pystac.extensions.osc import OscExtension, OscStatus

project = pystac.Collection(
    id="ocean-science",
    description="Ocean science research project",
    extent=pystac.Extent(
        pystac.SpatialExtent([[-180, -90, 180, 90]]),
        pystac.TemporalExtent([[None, None]]),
    ),
    license="proprietary",
)
OscExtension.ext(project, add_if_missing=True).apply_project(
    status=OscStatus.ONGOING,
    workflows=["ocean-workflow"],
)

product = pystac.Collection(
    id="ocean-temperature",
    description="Sea surface temperature product",
    extent=project.extent.clone(),
    license="CC-BY-4.0",
)
osc = OscExtension.ext(product, add_if_missing=True)
osc.apply_product(
    status=OscStatus.COMPLETED,
    project=project.id,
    region="Arctic",
    variables=["Sea surface temperature"],
    missions=["Sentinel-3"],
    experiment="experiment-42",
)
product.add_link(pystac.Link(
    rel="related",
    target="https://example.org/projects/ocean-science.json",
    media_type="application/json",
))

serialized = product.to_dict()
assert serialized["osc:project"] == project.id
assert OscExtension.get_schema_uri() in serialized["stac_extensions"]
restored = pystac.Collection.from_dict(serialized)
assert OscExtension.ext(restored).variables == ["Sea surface temperature"]