Reporter: sander.vantulden[at]falk.nl
[Submitted to the original trac issue database at 2.17pm, Monday, 19th January 2015]

Hi,

I found some roads in The Netherlands that have the wrong city associated with them. For example, if you take a street in the village called "Malden", [http://nominatim.openstreetmap.org/search?q=jonckherenhof&format=json&addressdetails=1&accept-language=nl Nominatim returns] the corresponding village to be "Heumen", which is the municipality', but not the 'village.

It took me some time, but I think I found what could be the reason for this mistagging. In The Netherlands, the admin_level for city' boundary is '''10''' and the '''municipality''' boundary is '8 ([http://wiki.openstreetmap.org/wiki/Key:admin%20level?uselang=en-US#References see here] for an explanation). This seems to be the other way around for other countries.

[https://www.openstreetmap.org/relation/409476#map=13/51.7811/5.8116 Here] is the "Heumen" city boundary relation (which holds the correct municipality boundary) and
[https://www.openstreetmap.org/relation/2725495#map=14/51.7713/5.8403 Here] is the "Heumen" suburb boundary relation (which holds the correct city boundary)
[https://www.openstreetmap.org/relation/2725496#map=14/51.7894/5.8535 Here] you can see that "Malden" also has a suburb boundary (which holds the correct city boundary). Because of the admin_level 10, "Heumen"'s admin_level 8 overrides it, to let it get the "Heumen" village tag.

Does this problem I describe make sense? Are country-specific admin_level tagging already handled in Nominatim? Or would it be possible to add it for specific countries?

This may be related to #5185, but I am not sure.