<br><br><div class="gmail_quote">On 14 April 2011 09:59, Steve Doerr <span dir="ltr"><<a href="mailto:doerr.stephen@gmail.com">doerr.stephen@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div text="#000000" bgcolor="#ffffff"><div class="im">
On 14/04/2011 08:21, Peter Miller wrote:
<blockquote type="cite"><br>
<br>
<div class="gmail_quote">On 12 April 2011 15:39, Steve Doerr <span dir="ltr"><<a href="mailto:doerr.stephen@gmail.com" target="_blank">doerr.stephen@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div>On 12/04/2011 15:16, Ed Avis wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
</blockquote>
</div>
</blockquote>
</div>
</blockquote>
<br>
<br>
</div><div class="im"><blockquote type="cite">
<div class="gmail_quote">
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">However, one flaw is that the speed
limit sign is not for 'dual carriageway<br>
limit applies' but rather 'national speed limit applies'.
So we still would not<br>
be tagging exactly what appears on the sign, but adding
some additional<br>
interpretation. I think that is fair enough, but those
who hold to a strict<br>
on-the-ground principle may disagree.<br>
</blockquote>
<br>
</div>
</blockquote>
</div>
</blockquote>
<br>
<blockquote type="cite">
<div class="gmail_quote">
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
I was going to make the same point.<br>
<br>
maxspeed:derivation=national_dual|national_single|motorway|restricted
?<br>
</blockquote>
<div><br>
</div>
</div>
</blockquote>
<br>
<blockquote type="cite">
<div class="gmail_quote">
<div>I think we are getting there. Two points:<br>
<br>
1) The phase maxspeed:type has already be proposed and is in
use in some places. Can I there suggest maxspeed:type rather
than maxspeed:derivation. I think that will also be more
understandable to people who's first language is not English.<br>
<br>
2) In place of 'national' can I suggest 'GB:' to fit with
international conventions.<br>
<br>
Which brings one to the following:<br>
<br>
maxspeed:type=GB:dual|GB:single|GB:motorway|GB:restricted<br>
<br>
</div>
</div>
</blockquote></div>
But that then negates the point Ed was making and that I was
agreeing with: that the sign says 'national speed limit applies' for
the first two. So my suggestion conveys two pieces of information in
one tag:<br>
<br>
- the road is subject to the national speed limit (because of a
sign);<br>
- the road is dual or single as the case may be (because the mapper
has observed it to be so).<br>
<br>
It also preserves explicitly the distinction between the national
speed limit (60 or 70, special sign) and the 30 mph 'restricted
road' limit.<br>
<br>
I don't mind 'type' for 'derivation', and the GB: prefix makes
sense. I believe GB is the ISO code for the UK, not necessarily
restricted to Great Britain (the British Isles minus the island of
Ireland).<br></div></blockquote><div><br>So the proposal is now:<br><br>maxspeed:type=GB:national_single|GB:national_dual|GB:motorway|GB:restricted<br><br>My only comment is that it is a little long, but it is at least unambiguous and clear and as such I am happy to go with it.<br>
<br>The shorthand of 'national' can therefore be translated into one of the above based on road class.<br><br><br>Regards,<br><br><br><br>Peter<br><br><br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div text="#000000" bgcolor="#ffffff">
<br>
-- <br>
Steve<br>
<br>
<br>
</div>
<br>_______________________________________________<br>
Talk-GB mailing list<br>
<a href="mailto:Talk-GB@openstreetmap.org">Talk-GB@openstreetmap.org</a><br>
<a href="http://lists.openstreetmap.org/listinfo/talk-gb" target="_blank">http://lists.openstreetmap.org/listinfo/talk-gb</a><br>
<br></blockquote></div><br>