@thibaultmol @MapComplete Thanks Thibault — I think mapping is a pretty obvious ground, and if I could do that all alone (without help of others and without estonian mappers interferring and nitpicking on tagging), I'd choose OSM. But this I need not for mapping (mapping is never the goal), but for city planning.
@zverik @thibaultmol @MapComplete The ages old frustration of professionals with OSM not bowing to superior knowledge ;)
Perhaps the nitpicking can be used to improve data quality?
The collaborative feature you mention sound like OSM notes and changeset comments, but more powerful - perhaps JOSM plugins (possibly not existing yet…) could help?