STAC harvester to harvest from copernicus

[pvgenuchten]

copernicus uses the STAC catalogue conventions to advertise their data collections

create the harvester which fetches collection metadata

STAC catalogue is a common cataloguing approach in earth observation repositories such as Copernicus

The copernicus STAC catalogue is available at https://catalogue.dataspace.copernicus.eu/stac

STAC is organised in collections: S2GLC, TERRAAQUA, SENTINEL-5P

For each collection a range of items (usually grid datasets) is available. In theory collections can also be nested in other collections, for now we just assume a single level of collections.

See also soilwise-he/governance#12