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</head><body text="#000000" bgcolor="#FFFFFF">DaveF made a really good point : boundary:administration=maritime (or something similar)? <br>
At least I expect those ways to deserve a particular tag as they are almost certainly special in many respects. <br>
<br>
Sincerely, the original idea to mass tag ways part of any boundary level for ease of rendering relation is... original ? <br>
Yves <br><br><div class="gmail_quote">Le 10 mars 2018 18:04:35 GMT+01:00, Dave F <davefoxfac63@btinternet.com> a écrit :<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
If Matthijs wishes to distinguish between boundaries at sea (a good
idea, I believe) then a *unique* tag should be added to those ways.
Duplicating data is not the way to indicate differences.<br />
<br />
How about boundary:administration=maritime (or something similar)? <br />
<br />
I've never understood why the highest admin_level value is required
to be placed on the way at all, when it's clearly calculable from
the relations. Data shouldn't be duplicated purely for the
convenience of renderers (or is it just one renderer?). I would
support removing them.<br />
<br />
Having read the links provided by Christoph, I find it very
disappointing there are some who still believe the time spent by
mappers adding data is somehow subservient to the time of those
coding. It's another case of the tail waging the dog. <br />
<br />
DaveF.<br />
<br />
<br />
<div class="moz-cite-prefix">On 10/03/2018 08:14, Colin Smale wrote:<br />
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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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Yves</body></html>