[OSM-talk-be] Correct use of is_in tag

[Glenn Plas]

On 2013-07-31 15:23, Joren wrote:
> Hi,
>
> I was wondering what's the correct use of the 'is_in'-tag in Belgium 
> (or Flanders in particular).
> When I search on openstreetmap.org for cities, I sometimes see the 
> detail it is in 'European Union'.
>
> For example, my own city Lier has following search result: " 
> Stadsgrens Lier, Mechelen, Antwerpen, Vlaanderen, België, European 
> Union" 
> <http://www.openstreetmap.org/?minlon=4.50586080551147&minlat=51.0726852416992&maxlon=4.64306163787842&maxlat=51.1657829284668>
> When I search for city Duffel: "Stadsgrens Duffel, Mechelen, 
> Antwerpen, Vlaanderen, België" 
> <http://www.openstreetmap.org/?minlon=4.46484470367432&minlat=51.0725708007812&maxlon=4.57519102096558&maxlat=51.1169281005859>
>
> As you can see, Lier is tagged correctly it is in the EU, Duffel 
> isn't. There are multiple other examples (Oostmalle, Zandhoven, ...)
>
> When I compare the tags:
>
> For Duffel (http://www.openstreetmap.org/browse/node/85635996/history)
>
>   * is_in <http://wiki.openstreetmap.org/wiki/Key:is%20in?uselang=nl>
>     =
>     Mechelen,Mechelen,Antwerpen,Antwerpen,Vlaanderen,Vlaanderen,Belgique,Belgique,Europe
>   * is_in:continent = Europe
>   * is_in:country = Belgium
>   * is_in:province = Antwerp
>   * name <http://wiki.openstreetmap.org/wiki/Key:name?uselang=nl> = Duffel
>   * + some openGeoDB-tags
>
> vs for Lier (http://www.openstreetmap.org/browse/node/30997655)
>
>   * is_in <http://wiki.openstreetmap.org/wiki/Key:is%20in?uselang=nl>
>     = Antwerpen, Belgium, Europe
>   * is_in:continent = Europe
>   * is_in:country = Belgium
>   * is_in:province = Antwerp
>   * name <http://wiki.openstreetmap.org/wiki/Key:name?uselang=nl> = Lier
>   * + some OpenGeoDB-tags (see links below)
>


Actually, Lier is incorrect considering this relation:

http://www.openstreetmap.org/browse/relation/2524403

Lier is in Arrondissement Mechelen.  You have to account for the 
Administrative layers.   Afaik, relations like this should replace the 
is_in tag, I never really got that tag either.

Glenn
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