[OSM-talk] Duplicate Buildings

[Marc_marc]

Le 14.03.23 à 13:45, Pierre Béland via talk a écrit :
> I imported the osm metadata using overpass

can youu share it to avoid having to make it again :)

> Simple Building duplicates from the same contributor are the easy ones to correct.

yes, on the condition that you can easily detect when the contributor 
wanted to represent a simple building ?
I imagine that a first criterion could be the absence of the level layer 
tag (which we see badly used in one of your examples) and perhaps 
building:level

> osm type	nb of 	     quaddup	objects
> way		1		838	 3352

maybe best to focus on that first

> See https://www.openstreetmap.org/relation/13965412 that contains way/677238859 with inner role to 6 relations that represent each level of the building.

commented https://www.openstreetmap.org/changeset/118924402

> one building is represented with one way (6 nodes) and 3 relations in which this way has role=outer.
>    way 1137657546 		building=cabin
>    Relation : 15538065		building=yes
>      Relation : 15538064		building=yes
>      Relation : Horsnæs Fangststation (15538063) place=locality

ccommented https://www.openstreetmap.org/changeset/133075628

> These are four different relations.
> -10326414	-10326413	-10326412	-10326411
> They all share these  2 buildings  as outer members.
> 48002128	505561207

what's strange is to have managed to do this with iD
but that's three mistakes :
- duplicate
- the garage is not a house
- the address in Switzerland represents an entrance door and by 
extention the building if this one has only one address. if the no. 7 
represents the house, the garage does have the no. 7 (but probably the 
number 7.1 which is rarely tagged in osm)

Regards,
Marc