[Geocoding] [OpenStreetMap] #4855: reverse geocaode provides wrong zip-code (postcode) and city

[OpenStreetMap]

#4855: reverse geocaode provides wrong zip-code (postcode) and city
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 Reporter:  5erBande                    |      Owner:  geocoding@…
     Type:  defect                      |     Status:  new
 Priority:  minor                       |  Milestone:
Component:  nominatim                   |    Version:
 Keywords:  reverse geocoding zip zoom  |
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 == Input ==
 http://nominatim.openstreetmap.org/reverse?format=xml&lat=50.926&lon=7.25&zoom=16&addressdetails=1

 == Result with Zoom level 16 ==
 The above request returns the ''<postcode>51491</postcode>'', which
 belongs to the city Overath nearby. The other adressparts are correct
 (''<city>Lohmar</city> <county>Rhein-Sieg-Kreis</county>'').

 Both, the lat/lon and the next street ''Dahlhauser Straße'' (osm_type=way
 osm_id=36991809) are within the boundary of the relation of the city
 ''Lohmar'' (osm_id=173123), which includes the right postcode
 (''postal_code = 53797''). I have checked the boundary OSM-relation of
 ''Lohmar'' and did not found an error.

 == Result with Zoom level 12 ==
 The search function uses the ''<suburb>Steinenbrück</suburb>''
 (osm_type=node osm_id="401294963), which is tagged ''is_in=Overath''. In
 this case postcode and city matches, but both is wrong.

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Ticket URL: <https://trac.openstreetmap.org/ticket/4855>
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