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If an enclave then it will share borders so would have to be in a
relation. <br>
If an island it's highly likely to have other admin_levels or even
be an exclave.<br>
-------------<br>
<br>
I'd recommend<br>
<ul>
<li>adding maritime=yes to all required ways that don't have them.</li>
<li>adding boundary=administrative relations to ways the require
them</li>
<li>removing admin_level & boundary=administrative from ways
which have them in relations</li>
</ul>
<br>
This should be adequate for OSM-Carto to render boundaries as
desired. however on GitHub, Matthijs claims "there is no way to
express that in CartoCSS".<br>
This is not a good enough reason to add & use duplicated tags on
ways. It's been agreed they are redundant.<br>
<br>
If Overpass can perform the required API call, why can't CartoCSS be
coded to do it?: <br>
<br>
<a href="http://overpass-turbo.eu/s/wWg" rel="nofollow">http://overpass-turbo.eu/s/x7H</a>
<p>rel<a
href="https://github.com/gravitystorm/openstreetmap-carto/pull/%7B%7Bbbox%7D%7D">"admin_level"="2"</a>;<br>
way(r)["maritime"="yes"];<br>
out geom;</p>
<p>DaveF<br>
</p>
<br>
<div class="moz-cite-prefix">On 18/03/2018 22:23, Kevin Kenny wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CALREZe8RnDH0qomQHA9XbQOesLtbTK6QZ8tyNUHv9x6q5w+Kjg@mail.gmail.com">
<pre wrap="">On Sun, Mar 18, 2018 at 12:11 PM, Andrew Hain
<a class="moz-txt-link-rfc2396E" href="mailto:andrewhainosm@hotmail.co.uk"><andrewhainosm@hotmail.co.uk></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">I agree entirely with Dave on this. Consider this a request to consider systematically removing the admin_level tag from ways or making it a discardable tag only for ways.
</pre>
</blockquote>
<pre wrap="">
I hope that you mean 'ways that are also part of a
boundary=administrative relation.' It's easy to imagine an
administrative region whose border is a single way (it's an island, or
it's an enclave entirely surrounded by another administrative region.
If you mean by this statement that 'an administrative region must
always be a relation,' please make that explicit.
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</pre>
</blockquote>
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