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<div class="moz-cite-prefix">Thanks for the fast replies.<br>
<br>
Following the wiki:<br>
<br>
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"The is_in tag pre-dates boundary polygons. When a region has a
well developed set of boundary polygons the information that could
be placed in the is_in tag on an object can usually be derived
from the boundaries that contain it. In this case, the information
in the tag is redundant. Some contributors even go as far as to
delete this tag when they see it as equivalent to the boundary
information.<br>
<br>
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The tag still can contain important information when boundaries
aren't fully developed. Even if the information is redundant, it
permits simpler searching and easy disambiguation between two
similarly named objects (without having to do extensive
calculations to calculate all the containing boundaries)."<br>
<br>
1. Are our boundaries well developed in Flanders/Belgium?<br>
2. Is the latter still true (related to the extensive
calculations/routing/...)?<br>
<br>
If we don't need it anymore, why keeping this tags?<br>
Looks to me quite related to the mapping/discussion of
'AssociatedStreet' and 'addr:xxxx'-tags. Not tag every single
house with all addr:-tags but create a relation that contains
these tags. I agree with the fact 'keep the exisiting ones as they
are', but is it applicable in this case to?<br>
I'm no expert on geotagging/database management/... and am
studying Industrial Engineer. One of the key principles in an
organisation is: Remove everything you don't need from the 'work
area' (OSM in this example). It waste time/resources/... (see
'Lean', <a class="moz-txt-link-freetext" href="http://en.wikipedia.org/wiki/Lean">http://en.wikipedia.org/wiki/Lean</a>). Not to say we have to
move toward a full Lean OSM :), but if we really don't need it
anymore -> kill it.<br>
<br>
Op 31/07/13 15:39, Glenn Plas schreef:<br>
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<div class="moz-cite-prefix">On 2013-07-31 15:23, Joren wrote:<br>
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Hi,<br>
<br>
I was wondering what's the correct use of the 'is_in'-tag in
Belgium (or Flanders in particular).<br>
When I search on openstreetmap.org for cities, I sometimes see
the detail it is in 'European Union'. <br>
<br>
For example, my own city Lier has following search result: "
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Stadsgrens <font color="#000000"><a moz-do-not-send="true"
href="http://www.openstreetmap.org/?minlon=4.50586080551147&minlat=51.0726852416992&maxlon=4.64306163787842&maxlat=51.1657829284668"
class="set_position" data-id="964259" data-lat="51.131069"
data-lon="4.5696516" data-max-lat="51.1657829284668"
data-max-lon="4.64306163787842"
data-min-lat="51.0726852416992"
data-min-lon="4.50586080551147" data-name="Lier, Mechelen,
Antwerpen, Vlaanderen, België, European Union"
data-prefix="Stadsgrens" data-type="relation">Lier,
Mechelen, Antwerpen, Vlaanderen, België, European Union"</a><br>
When I search for city Duffel:</font> "Stadsgrens <a
moz-do-not-send="true"
href="http://www.openstreetmap.org/?minlon=4.46484470367432&minlat=51.0725708007812&maxlon=4.57519102096558&maxlat=51.1169281005859"
class="set_position" data-id="964195" data-lat="51.0957176"
data-lon="4.5061988" data-max-lat="51.1169281005859"
data-max-lon="4.57519102096558"
data-min-lat="51.0725708007812"
data-min-lon="4.46484470367432" data-name="Duffel, Mechelen,
Antwerpen, Vlaanderen, België" data-prefix="Stadsgrens"
data-type="relation">Duffel, Mechelen, Antwerpen, Vlaanderen,
België"</a><br>
<br>
As you can see, Lier is tagged correctly it is in the EU, Duffel
isn't. There are multiple other examples (Oostmalle, Zandhoven,
...)<br>
<br>
When I compare the tags:<br>
<br>
For Duffel (<a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://www.openstreetmap.org/browse/node/85635996/history">http://www.openstreetmap.org/browse/node/85635996/history</a>)<br>
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<ul>
<li><a moz-do-not-send="true"
href="http://wiki.openstreetmap.org/wiki/Key:is%20in?uselang=nl"
title="De wikipagina die het label is_in beschrijft">is_in</a>
=
Mechelen,Mechelen,Antwerpen,Antwerpen,Vlaanderen,Vlaanderen,Belgique,Belgique,Europe</li>
<li>is_in:continent = Europe</li>
<li>is_in:country = Belgium</li>
<li>is_in:province = Antwerp</li>
<li><a moz-do-not-send="true"
href="http://wiki.openstreetmap.org/wiki/Key:name?uselang=nl"
title="De wikipagina die het label name beschrijft">name</a>
= Duffel</li>
<li>+ some
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openGeoDB-tags<br>
</li>
</ul>
<p>vs for Lier (<a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://www.openstreetmap.org/browse/node/30997655">http://www.openstreetmap.org/browse/node/30997655</a>)</p>
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</p>
<ul>
<li><a moz-do-not-send="true"
href="http://wiki.openstreetmap.org/wiki/Key:is%20in?uselang=nl"
title="De wikipagina die het label is_in beschrijft">is_in</a>
= Antwerpen, Belgium, Europe</li>
<li>is_in:continent = Europe</li>
<li>is_in:country = Belgium</li>
<li>is_in:province = Antwerp</li>
<li><a moz-do-not-send="true"
href="http://wiki.openstreetmap.org/wiki/Key:name?uselang=nl"
title="De wikipagina die het label name beschrijft">name</a>
= Lier</li>
<li>+ some OpenGeoDB-tags (see links below)<br>
</li>
</ul>
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<br>
<br>
Actually, Lier is incorrect considering this relation:<br>
<br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.openstreetmap.org/browse/relation/2524403">http://www.openstreetmap.org/browse/relation/2524403</a><br>
<br>
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.<br>
<br>
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