Hi Growebis, here is the link to our thread in the list’s archive: https://lists.openstreetmap.org/pipermail/talk-ca/2023-May/010758.html

We had the discussion in French, if you need English you could paste the content in https://www.deepl.com/translator

Hi, Based on your diary entry there is currently a discussion on https://lists.openstreetmap.org/listinfo/talk-ca. I would like to invite you to join us there.

I also would be interested to get the buildings into OSM. There is a very nice accurate buildings’ footprint data set provided by the City of Montreal since 2016, even with the expressed consent to import it into OSM. However, there is a reason why it is not yet imported: The data source doesn’t come as individual buildings for terraced houses. There is a divider layer included, however, it is not trivial to split up the data into single buildings - the way we usually enter buildings in OSM. For more see the discussion on the list.