<div dir="ltr"><div><div>It depends on what map is supposed to display. In this case I want a city-wide map with oneway roads that are potential candidates <br>for designating them as contraflow for bicycles (all oneway roads without oneway:bicycle=no that are not a dual carriageways).<br>
<br>I implemented it using dual_carriageway=yes for identification of dual carriageways in <br><a href="https://github.com/mkoniecz/bicycle_map_of_Krakow/commit/e10ecfb8d54d9c6e6e7f6e327647017a1c656a5c">https://github.com/mkoniecz/bicycle_map_of_Krakow/commit/e10ecfb8d54d9c6e6e7f6e327647017a1c656a5c</a><br>
<br></div>I use also some other hints and together it is almost 100% effective (still some roads where contraflow would be completely <br>unreasonable are marked, like <a href="http://www.openstreetmap.org/?mlat=50.05948&mlon=19.97578#map=18/50.05948/19.97578">http://www.openstreetmap.org/?mlat=50.05948&mlon=19.97578#map=18/50.05948/19.97578</a> ) <br>
but in general it is nearly 100% effective without any postprocessing.<br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-07-17 21:55 GMT+02:00 Paul Johnson <span dir="ltr"><<a href="mailto:baloo@ursamundi.org" target="_blank">baloo@ursamundi.org</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">How is this, in any way, incorrect rendering, particularly at higher zoom levels?</div><div class="gmail_extra">
<br><br><div class="gmail_quote"><div class="">On Thu, Jul 10, 2014 at 4:07 PM, Mateusz Konieczny <span dir="ltr"><<a href="mailto:matkoniecz@gmail.com" target="_blank">matkoniecz@gmail.com</a>></span> wrote:<br>
</div><div><div class="h5"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Road itself is not oneway as it has two one-way carriageways in opposite directions. Carriageways are mapped in OSM as separate one-way ways.<br>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">
2014-07-10 21:32 GMT+02:00 John F. Eldredge <span dir="ltr"><<a href="mailto:john@jfeldredge.com" target="_blank">john@jfeldredge.com</a>></span>:<div><div><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I am confused. You state that the road is divided into two carriageways, that neither carriageway is one-way, and also that each carriageway is one-way. How can a given carriageway be both one-way and not one-way at the same time?<br>
<div><div><br>
<br>
On July 10, 2014 5:20:16 AM CDT, Mateusz Konieczny <<a href="mailto:matkoniecz@gmail.com" target="_blank">matkoniecz@gmail.com</a>> wrote:<br>
> I am thinking about marking tagging roads with separate carriageways.<br>
> I<br>
> want to create map with oneway roads, but in OSM data roads with<br>
> separate<br>
> carriageways that are not oneway are frequently represented as<br>
> separate<br>
> ways, both tagged as oneway.<br>
><br>
> Adding tag that that would describe way as part of dual carriageway,<br>
> with<br>
> twin road leading in opposite direction would allow to solve this<br>
> problem.<br>
><br>
> I am currently thinking about good name for this tag and whatever<br>
> there is<br>
> possibly to achieve this result solely by processing OSM data<br>
> (processing<br>
> is probably necessary anyway to catch cases like<br>
> <a href="https://www.openstreetmap.org/way/182138211" target="_blank">https://www.openstreetmap.org/way/182138211</a> ).<br>
><br>
><br>
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</div><span><font color="#888888">--<br>
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