[OSM-talk-be] bug adresse

[marc marc]

Thank you, I did not know the Nominatim report,
it is very useful.

Would it be interesting to ask that Nominatim use
associatedStreet or "is_in boundary" belonging
to the node or building instead of using
the "is_in boundary" of the street ?
Because there are many streets that are a boundary
between two municipalities.
It would be strange to duplicate is_in tag on many
nodes/buildings that are already in the right boundary

 > split the street exactly on the boundary.
Split ? or merge ? Because imho, the communal limit
is the middle of the street.
The difference between street and boundary seems
to be a precision error or "tag for rendering"
Way 28825406 should use nearly all nodes as way 237824921
the only not-shared node could be at "avenue de la liberté"

Regards,
Marc

Le 26. 08. 17 à 17:54, Yves bxl-forever a écrit :
> Hello,
> 
> This is a really interesting problem, and it looks like a documented weakness of the algorithm.
> 
> This is what the Wiki says about this (https://wiki.openstreetmap.org/wiki/Nominatim/FAQ#How_was_the_address_calculated.3F)
> 	Features down to street level addresses are calculated using a combination
> 	of admin boundaries, is_in tags and place features.  For building level features
> 	addresses are calculated using the address of the most suitable street.
> 	If no explicit boundaries or relations are included the system will fall back
> 	to a simple 'nearest' calculation—this will often be wrong!
> 
> This is how Nominatim computes the address for that house.
> https://nominatim.openstreetmap.org/details.php?place_id=26946130
> 
> In this case, it appears that the street is found within 2 municipalities.  Node 66192903 (Koekelberg) is closer than node 66196464 (Molenbeek) → it assumes the house is located in Koekelberg.
> If we want to solve this, either we should fill "is_in" keys everywhere or split the street exactly on the boundary.
> 
> Have a nice day.
> Yves
> 
> 
> 
> On Sat, 26 Aug 2017 14:29:18 +0000
> marc marc <marc_marc_irc at hotmail.com> wrote:
> 
>> Bonjour,
>>
>> Je ne comprend pas où est l'erreur pour l'adresse de ce nœud
>> http://www.openstreetmap.org/node/2528505484
>>
>> Un clic droit "afficher l'adresse" donne "1, Rue de Normandie,
>> Koekelberg, Bruxelles-Capitale, 1081, Belgique"
>> L'erreur est 1081 au lieu de 1080.
>>
>> La rue a un côté 1080 et l'autre côté 1081 mais je ne trouve
>> pas où se trouve le 1081 erroné. Le nœud fait partie de :
>> - is_in Chemin : Stade du Stippelberg (30163631)  pas de postal_code
>> - Relation : Rue de Normandie (3321170) addr:postcode=1080
>> - is_in  Relation : Postal code 3379417
>>    qui a boundary=postal_code + postal_code=1080
>> - is_in Relation : Molenbeek-Saint-Jean (58255)
>>    qui a boundary=administrative + addr:postcode=1080
>>
>> Il y a quelque chose que je n'ai pas vu ou c'est un bug ?
>>
>> Cordialement,
>> Marc
>> _______________________________________________
>> Talk-be mailing list
>> Talk-be at openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/talk-be
> 
> _______________________________________________
> Talk-be mailing list
> Talk-be at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-be
>