[OSM-talk] All you've ever wanted to know about the french cadastre

[Martin Koppenhoefer]

2012/9/30 Christian Quest <cquest at openstreetmap.fr>:
> We provided explanations many times...
> Separate polygons can come from:
> - different ownership of building parts
...
> It is not data errors, but much more detailed geometry compared to
> what you can do by simply surveying or trace on aerials.


IMHO it is a data error when one building is split up into several
buildings because the one building has more than 1 owner, or do you
tag the parts as parts and have eventually a method of recombining
these parts into one building? As far as I know we do not at all tag
owners of objects in OSM.

cheers,
Martin