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<body class='hmmessage'><div dir='ltr'>Hi Henning,<br><br>okay. I think WanMil told me that before, but I forgot again ... <br><br>A few details:<br><br>mkgmap always reversed routable ways with oneway=-1 or oneway=reverse after style processing.<br><br>With r2944 I've changed the code so that this happens before calling RoadMerger and also that overlaying <br>lines are reversed.<br><br>If I got that right, the style may use different types for overlaying lines, depending on the oneway tag,<br>so if you use the same style for r2943 or older and for current version, you should see a difference<br>for oneway=-1 ways.<br>I don't know how difficult it is to change the style to produce correct results with current version again,<br>but you have to remember that the way is reversed, so left will be right, forward will be backward.<br><br>I see two alternatives:<br>1) mkgmap reverses the way before style processing. This requires also to reverse all tags like<br>bicycle:left, car:forward etc, so it is not trivial. On the other hand, it might allow to merge more <br>roads in RoadMerger.<br>2) mkgmap makes sure that overlaying lines are NOT reversed. I think this can be done<br>with the attached patch.<br><br>By the way: There are also tags on nodes which depend on the direction of the way, see<br>http://gis.19327.n5.nabble.com/direction-forward-backward-on-nodes-tt5803072.html<br><br>I think we can ignore this because in the points file you can't detect the direction of the way.<br><br>Gerd<br><div><hr id="stopSpelling">Date: Wed, 16 Apr 2014 23:00:35 +0200<br>From: osm@aighes.de<br>To: mkgmap-dev@lists.mkgmap.org.uk<br>Subject: Re: [mkgmap-dev] mkgmap ToDo list<br><br>
<div class="ecxmoz-cite-prefix">Am 16.04.2014 22:01, schrieb GerdP:<br>
</div>
<blockquote cite="mid:1397678496610-5803443.post@n5.nabble.com">
<pre>Why do you think that it is a bug?</pre>
</blockquote>
<font size="-1"><font face="Helvetica, Arial, sans-serif">Think
about oneway=-1 and in style you add oneway-arrows (link mapnik
does). In style you will handle -1 special, because arrows
should drawn in oposite direction of way. If mkgmap now changes
direction of the way, arrows should be in wrong direction, or am
I wrong?<br>
<br>
Henning<br>
</font></font>
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