[mkgmap-dev] RoadMerger and adjust-turn-headings

Fri Feb 21 07:25:08 GMT 2014

Hi WanMil,

in addition to my previous post:
A completely different approach would be to add or change a point near the crossing
(in RoadMerger)
so that the bearings calculated in RoadNetwork are fine. In that case we just
have to store one bit in the Coord instance to tell tweezeArcs() that this point
should not be changed. The additional point(s) could be very close to the crossing
and maybe removed later.

Gerd

> Date: Thu, 20 Feb 2014 22:35:40 +0100
> From: wmgcnfg at web.de
> To: mkgmap-dev at lists.mkgmap.org.uk
> Subject: Re: [mkgmap-dev] RoadMerger and adjust-turn-headings
> 
> > Hi WanMil,
> >
> > I think the code for --adjust-turn-headings in  RouteNode.tweezeArcs()
> > looks rather similar to that in RoadMerger, and maybe
> > will not work as well in combination with RoadMerger
> > as it assumes that two arcs with the same
> > road (OSM id) are building the "main road":
> >
> >              // the code tries to detect a pair of arcs (the "incoming"
> >              // arc and the "outgoing" arc) that are the "main road"
> >              // and the remaining arc (called the "other" arc) which is
> >              // the "side road"
> >
> > I got the impression that RoadMerger also calculates the
> > required data (angles etc).
> > It would be great if RoadMerger could store the information
> > somewhere so that tweezeArcs could use it.
> >
> > Gerd
> >
> 
> Ok, do you have an idea how to store the required information?
> 
> WanMil
> 
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