[Imports] [buildings] Italy

[Frederik Ramm]

Hi,

On 23.05.22 10:06, Cascafico Giovanni wrote:
> I'd like to import building footprints recently published by Microsoft.
> Here [1] is an import wiki draft.

I am skeptical. The data is known to be of very mixed quality and does 
need manual inspection. You will not be able to do this alone, you need 
dozens of volunteers - ideally with local knowledge - to help. Does this 
project have wide support in the Italian OSM community or is it a 
one-man-show?

Also you will want to ensure not only that imported buildings don't 
overlap other buildings - they should not overlap with roads, rivers or 
other features either, and if they do the situation needs to be manually 
checked - are the features in OSM wrong, is the building wrong, or is 
this really a building with a road underneath, etc.

I am also concerned that - compared to manual tracing - this will add 
(old) buildings and nothing else, whereas someone manually tracing an 
area would usually result in a richer set of features (and someone 
familiar with the area doing it, even better data).

Italy has many very old towns with lots of non-rectangular buildings 
placed wall-by-wall, intermixed mit sheds and all - even for a human 
being it can often be hard to discern individual buildings on the 
imagery. Have you checked if the data you want to import is good enough 
in these areas - or will someone visiting the area and wanting to map 
individual house numbers have to delete and re-draw everything?

Bye
Frederik

-- 
Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"