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<div class="moz-cite-prefix">On 2014-03-11 20:23, Ben Laenen wrote :<br>
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<blockquote cite="mid:1747709.ngly0Qgm2y@kalliope" type="cite">
<pre wrap="">On Tuesday 11 March 2014 02:21:28 André Pirard wrote:
NGI rules:
N#, N##, R#, R##: primary
N###: secondary
</pre>
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Not exactly. on the TOP10R map I've shown, N633 (Ourthe), N678, N30
(Beaaufays-Aywaille), N3 (Liege-Germany) are all in red, that's
"national", but of different widths. Administrative classification.<br>
...<br>
<blockquote cite="mid:1747709.ngly0Qgm2y@kalliope" type="cite">
<pre wrap="">So, drop all the "making sense" bits in the OSM rules, and we get the NGI
rules :-)
But the wiki page should be adjusted to get the above rules, as that's how
almost all of Belgium is currently mapped...
</pre>
</blockquote>
That's almost fine.<br>
But if I look at N674, one part linking N30 and N62 is primary, the
next part going west is secondary, <b>and that makes sense</b>, But
the third part called "route de Méry" is not to be recommended for
secondary traffic in my opinion. It's 5 m wide, winding and as a
moderate size lorry can be 2.5 m wide, they can hardly cross one
another, not speaking of agricultural/farming vehicles that are
frequent on that road.<br>
<br>
And all those classifications are subject to discussion and hence
imprecision.<br>
<br>
This is why I believe that an <b>additional</b> classification
would be much beneficial to routing.<br>
If the map contained road width, and road surface, routing software
can compute altitude and rectitude and it would have <b>objective</b>
(not subject to personal feelings or any national convention) data
to use for optimal routing (as long as mappers can understand that
restrictions are mapped for routers to understand and not people).<br>
And as road width is the easiest thing to measure on Bing with a
JOSM tool, and as road surface is something that someone living no
more than 10 or 20 km away knows or can know, Belgium could be
optimally mapped for routing in a short time. And OSM routing
developers would certainly be happy to use that data.<br>
<br>
Cheers,<br>
<br>
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<td>André.</td>
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