Add the UVP-Portal specific to Niedersachsen and bump the tiers of the UVP-Verbund so it isn't treated as a primary source anymore. (!839) · Merge requests · umwelt-info / metadaten

This does not really add any new datasets, just fixes the primary source for existing ones:

Add the UVP-Portal specific to Niedersachsen and bump the tiers of the UVP-Verbund so it isn't treated as a primary source anymore.