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<p>I would have to second this observation, this would seem to go
exactly against what we've tried to fix with multi-polygons (not
to mention a future area object type). Not to mention that a
single way can be a member of multiple different borders at
different admin levels, so this would seem to be a non-starter in
any case.<br>
</p>
<p>Simon<br>
</p>
<br>
<div class="moz-cite-prefix">Am 10.03.2018 um 09:14 schrieb Colin
Smale:<br>
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cite="mid:7375424a61e35f5fdab8bd1f4392edd3@xs4all.nl">
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<p>Matthijs,</p>
<p>This goes against the principle of tagging the relation, not
the members. An admin area is syntactically analogous to a
multipolygon and it would be a shame to introduce yet another
polygon tagging paradigm.</p>
<p>What are you thinking for other types of
boundaries? boundary=political, boundary=national_park come to
mind. Will they be treated differently to
boundary=administrative?</p>
<div> </div>
<p>What do you intend exactly when you say "maritime boundaries"?
That part of a (national) boundary which crosses water? Or some
other definition?</p>
<p>Colin</p>
<p>On 2018-03-10 01:51, Matthijs Melissen wrote:</p>
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<div class="pre" style="margin: 0; padding: 0; font-family:
monospace">Hi all,<br>
<br>
OpenStreetMap Carto, the default stylesheet on
openstreetmap.org, is<br>
considering to change the mechanism for rendering admin
boundaries.<br>
The proposed rendering of admin borders will be based on admin<br>
boundary ways rather than polygons. This has a number of
advantages -<br>
for example, it will make it possible to style maritime
boundaries<br>
differently.<br>
<br>
The admin boundary ways are already in the database. However,
in some<br>
cases they are missing an admin_level tag. When the proposed
style<br>
change will be deployed, boundary=administrative ways without<br>
admin_level tag will no longer be rendered. I would therefore
suggest<br>
to make sure admin_level tags are present on all<br>
boundary=administrative ways.<br>
<br>
A map showing admin boundary ways without admin_level tag
(displayed<br>
in gray) can be found here:<br>
<a
href="http://product.itoworld.com/map/2?lon=20.00736&lat=51.92203&zoom=6"
target="_blank" rel="noopener noreferrer"
moz-do-not-send="true">http://product.itoworld.com/map/2?lon=20.00736&lat=51.92203&zoom=6</a><br>
As can be seen, most countries already do have admin_level on
ways.<br>
However, in for example Poland, Iran and Australia, this data
seems to<br>
be missing.<br>
<br>
-- Matthijs<br>
<br>
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