[Geocoding] [OpenStreetMap] #5261: Lookup with postalcode fails

[OpenStreetMap]

#5261: Lookup with postalcode fails
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  Reporter:  pmiller.live@…  |      Owner:  geocoding@…
      Type:  defect          |     Status:  new
  Priority:  minor           |  Milestone:
 Component:  nominatim       |    Version:
Resolution:                  |   Keywords:
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Comment (by lonvia):

 It's actually not quite clear what the query means. Are you looking for a
 city called Zurich with postcode 8005 or for postcode 8005 within Zurich.
 It may sound similar but it changes how Nominatim looks for the result.
 Currently it does the first and that doesn't work because there is no such
 object (with Zurich having more than one postcode and all).

 If you are looking for the second then you should leave out the city
 parameter. Postal codes are assumed to be unique per country. So, this
 will work:

 http://nominatim.openstreetmap.org/search?postalcode=8005&country=ch&format=json

 In any case, postalcode + city should yield some sensible result. Probably
 by just looking for the postcode with the city.

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Ticket URL: <https://trac.openstreetmap.org/ticket/5261#comment:1>
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