[maartenh]

Wow, that's quite different from the Netherlands. Here, we have the BAG, Basis Administratie Gebouwen (Base Administration Buildings).

Muniplicities are the data owners, but data is also collated nationally.

See [0] for a viewer of this public data.

Also, all our surveying/road data is managed in a similar fashion, and this is regularly imported in e.g. openstreetmap.

[0] https://bagviewer.kadaster.nl/lvbag/bag-viewer/?zoomlevel=1

[systemtest]

I like BAG. It is a shame that our WOZ-waarde (municipal home valuation) isn't a similar centralised system but that every municipality does their own thing. Similar for zoning, charge points and traffic signage / traffic data.