[Geocoding] [OpenStreetMap] #4247: Nominatim problem: Location in Calderdale is returning suburb in Bradford, a neighbouring metropolitan county

[OpenStreetMap]

#4247: Nominatim problem: Location in Calderdale is returning suburb in Bradford,
a neighbouring metropolitan county
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 Reporter:  scillystuff  |       Owner:  geocoding@…                
     Type:  defect       |      Status:  new                        
 Priority:  minor        |   Milestone:                             
Component:  nominatim    |     Version:                             
 Keywords:  suburb       |  
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Comment(by lonvia):

 This is another incarnation of the problem of missing administrative
 levels.

 When making up an address, Nominatim tries to relate a place to as many
 administrative levels as possible. Because Calderdale does not have
 suburbs, Nominatim adds the closest suburb it can find, which in this case
 happens to be a suburb of Bradford.

 Nominatim needs a detection that excludes place nodes that are outside the
 area of a lower administrative level polygon in the same address.

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Ticket URL: <https://trac.openstreetmap.org/ticket/4247#comment:1>
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