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<div class="moz-cite-prefix">On 2014-03-10 18:14, Glenn Plas wrote :<br>
</div>
<blockquote cite="mid:531DF306.6050701@byte-consult.be" type="cite">On
10-03-14 18:03, Ben Laenen wrote:
<br>
<blockquote type="cite">On Monday 10 March 2014 17:48:06 André
Pirard wrote:
<br>
<blockquote type="cite">According to IGN/NGI and the reasoning
below, Benedestraat N211a is
<br>
(officially) a secondary road.
<br>
<br>
The first question is; what is a "primary/secondary/tertiary
road?".
<br>
And why is it useful to know? To make better GPS routing?
<br>
</blockquote>
The current conventions are written more or less down here
<br>
<a class="moz-txt-link-freetext" href="http://wiki.openstreetmap.org/wiki/WikiProject_Belgium/Conventions/Highways">http://wiki.openstreetmap.org/wiki/WikiProject_Belgium/Conventions/Highways</a>
<br>
(but the bit written after tertiary about suffix letters isn't
really correct,
<br>
and the bit on trunk roads could be changed a bit to include
express roads
<br>
that aren't motorroads but don't allow pedestrians and cyclists)
<br>
<br>
So we're using the road numbers to decide on secondary/primary.
These rules
<br>
are up for debate but the problem is getting better definitions
so we don't
<br>
risk getting into a discussion for every possible road where one
person would
<br>
classify a road primary, while another one thinks it's secondary
etc. (*)
<br>
</blockquote>
</blockquote>
Thanks for drawing my attention to that table ;-)<br>
So, I think that the IGN/NGI classifications are more or less the
same. They're based on kind of traffic (main/link/local), <br>
<table cellpadding="2" cellspacing="2" align="center">
<tbody>
<tr>
<th valign="top" align="center">IGN/NGI<br>
</th>
<th valign="top" align="center">OSM<br>
</th>
</tr>
<tr>
<td valign="top" bgcolor="#993399">motorway<br>
</td>
<td valign="top">motorway<br>
</td>
</tr>
<tr>
<td valign="top" bgcolor="#ff0000">national<br>
</td>
<td valign="top">primary<br>
</td>
</tr>
<tr>
<td valign="top" bgcolor="#cc9933">link<br>
</td>
<td valign="top">secondary<br>
</td>
</tr>
<tr>
<td valign="top" bgcolor="#ffff00">local<br>
</td>
<td valign="top">tertiary or residential</td>
</tr>
</tbody>
</table>
<br>
but that OSM-be based on digits is different<br>
<br>
<table cellpadding="2" cellspacing="2" align="center">
<tbody>
<tr>
<th valign="top" align="center">OSM-be<br>
</th>
<th valign="top" align="center">OSM<br>
</th>
</tr>
<tr>
<td valign="top" bgcolor="#ff0000">1 or 2<br>
</td>
<td valign="top">primary<br>
</td>
</tr>
<tr>
<td valign="top" bgcolor="#cc9933">2 or 3<br>
</td>
<td valign="top">secondary<br>
</td>
</tr>
<tr>
<td valign="top" bgcolor="#ffff00"><br>
</td>
<td valign="top">tertiary or residential</td>
</tr>
</tbody>
</table>
<br>
OSM-be can raise dispute for Nxx or for special cases.<br>
IGN/NGI does not, but it can be plain wrong.<br>
Speaking of my two-road comparison, that one where lorries can
hardly cross each other is red and where they have no problem it is
brown.<br>
<br>
Replying to Glenn below, pretty colors on the map are pretty but I
think there is more important.<br>
The most important in my eyes is the number one OSM application: OSM
GPS routing.<br>
And that brings me back to road width.<br>
What could be more useful and less disputed than road width which,
in addition to surface, makes the perfect data for routers, tell me
if I'm wrong or if I forget something? <br>
<br>
5m macadam vs 6m macadam. <br>
Simply measured on Bing with JOSM measurement tool.<br>
I will check.<br>
<br>
Cheers,<br>
<br>
<table>
<tbody>
<tr>
<td>André.</td>
</tr>
</tbody>
</table>
<br>
<blockquote cite="mid:531DF306.6050701@byte-consult.be" type="cite">
<blockquote type="cite">
<br>
The current rules aren't perfect but they generally give maps
that are
<br>
satisfactory, since all important roads are managed by our
regional government
<br>
and thus have road numbers, and thus are at least secondary.
<br>
</blockquote>
I think in this specific case that OsmAnd_pieter is actually
correct to change this road into secondary. But I don't think
it's _that_ important (between 2nd or 3rd). Let's be a sinner
and think of 'the map' displayed as it is. Trunk roads, Highways
and primaries are displayed with enough contrast. (green, blue ,
red).
<br>
<br>
The difference between 2nd and 3rd is hardly visible, I would
say he's right. I live in the area so I know what road that is
and it's an important one over here, so making it secondary isn't
that far of reality.
<br>
<br>
Glenn
<br>
<br>
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</blockquote>
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