[Geocoding] [OpenStreetMap] #5280: Use admin_center for reverse geocoding

[OpenStreetMap]

#5280: Use admin_center for reverse geocoding
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 Reporter:  StephaneP    |      Owner:  geocoding@…
     Type:  enhancement  |     Status:  new
 Priority:  minor        |  Milestone:
Component:  nominatim    |    Version:
 Keywords:               |
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 If I reverse geocode an isolated dwelling, it returns correctly the city :
 http://nominatim.openstreetmap.org/reverse?format=xml&osm_type=N&osm_id=2514066146&zoom=18&addressdetails=1
 The city is "Saint-Hilaire-de-Clisson"

 But it's not the case if I reverse geocode a hamlet :
 http://nominatim.openstreetmap.org/reverse?format=xml&osm_type=N&osm_id=1281300035&zoom=18&addressdetails=1

 I know that hamlets and villages are on the same level for nominatim and
 it explains why it doesn't return "Saint-hilaire-de-clisson". But in
 France there are a lot of hamlet with the same name inside an
 admin_level=7 boundary. "Beaulieu", "Bellevue", "Bel Air" are some
 examples. If you don't know in which city/village this hamlet is, you're
 lost : Search for "bel-air" on admin_level=7
 http://nominatim.openstreetmap.org/search.php?q=bel+air+in+nantes&viewbox=-3.73%2C47.85%2C0.96%2C45.92

 I don't ask for moving hamlet to another level, but to use the
 admin_center of the admin_level 8 boundary.

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Ticket URL: <https://trac.openstreetmap.org/ticket/5280>
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