[mkgmap-dev] Curvy routing support: new function?

Fri Aug 1 17:08:54 BST 2014

Hi WanMil,

sorry I did not want to create pressure - it's holiday time :-)
Just thought it drowned below noise level

If I can help by looking at the source code, please let me know

Cheers
Manfred

> Hi Manfred,
> 
> I do not have time to have a look on it within the next weeks. So please 
> help yourself or wait... Sorry :-)
> 
> WanMil
> 
> > Hi WanMil,
> >
> > unfortunately the curviness() function does not work as expected yet. I can try to help to analyse it, may I have a look at the source code anywhere? The function alone would be enough
> >
> > Thanks and cheers
> > Manfred
> >
> >
> > PS: please find detailed analysis in my mail from July 3
> >
> >
> >> Gesendet: Donnerstag, 03. Juli 2014 um 20:49 Uhr
> >> Von: WanMil <wmgcnfg at web.de>
> >> An: "Development list for mkgmap" <mkgmap-dev at lists.mkgmap.org.uk>
> >> Betreff: Re: [mkgmap-dev] Curvy routing support: new function?
> >>
> >> I forgot to clean before build...
> >> Here is the new version: http://files.mkgmap.org.uk/detail/216
> >>
> >>> Hi WanMil,
> >>>
> >>> you are very fast, thank you very much for this!
> >>> However I'm facing some expectations, log:
> >>> java.lang.NoSuchMethodError: uk.me.parabola.mkgmap.reader.osm.Way.deleteTag(Ljav
> >>> a/lang/String;)V
> >>>           at uk.me.parabola.mkgmap.reader.osm.MultiPolygonFinishHook.end(MultiPoly
> >>> gonFinishHook.java:50)
> >>>           at uk.me.parabola.mkgmap.reader.osm.OsmReadingHooksChain.end(OsmReadingH
> >>> ooksChain.java:79)
> >>>           at uk.me.parabola.mkgmap.reader.osm.o5m.O5mBinMapDataSource.load(O5mBinM
> >>> apDataSource.java:49)
> >>>           at uk.me.parabola.mkgmap.reader.osm.OsmMapDataSource.load(OsmMapDataSour
> >>> ce.java:127)
> >>>           at uk.me.parabola.mkgmap.main.MapMaker.loadFromFile(MapMaker.java:167)
> >>>           at uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:63)
> >>>           at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:253)
> >>>           at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:249)
> >>>           at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
> >>>           at java.util.concurrent.FutureTask.run(Unknown Source)
> >>>           at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
> >>>           at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
> >>>           at java.lang.Thread.run(Unknown Source)
> >>>
> >>> (I have installed r3310 which works ok, and then replaced mkgmap.jar by your build)
> >>>
> >>> I'm open to any suggestions for other logic. A curviness function can only be a virtual value, not physical. However it may probably sufficient to say, curviness=length()/distance(first_point, last_point)? May be I'm thinking too complex :-)
> >>>
> >>> Cheers
> >>> Manfred
> >>>
> >>>
> >>>
> >>>> Gesendet: Dienstag, 01. Juli 2014 um 22:32 Uhr
> >>>> Von: WanMil <wmgcnfg at web.de>
> >>>> An: "Development list for mkgmap" <mkgmap-dev at lists.mkgmap.org.uk>
> >>>> Betreff: Re: [mkgmap-dev] Curvy routing support: new function?
> >>>>
> >>>> Hi,
> >>>>
> >>>> I remember that it is on my Todo-List :-)
> >>>>
> >>>> So I performed a quick implementation following your suggestion. You can
> >>>> find in the attached patch so that you can play a little bit with it.
> >>>> (Attention: it is completely untested!!)
> >>>> You can find a patched mkgmap.jar at http://files.mkgmap.org.uk/detail/215.
> >>>>
> >>>> I think curviness should to be defined in a different way.
> >>>> 1. Calculate the distance of each point Dmiddle to the virtual line from
> >>>> first to the last point.
> >>>> 2. curviness()=standard mean(Dmiddle/(length to next point + length to
> >>>> previous point)
> >>>>
> >>>> I think this gives a better indication how curviness a road is. But it
> >>>> need to be implemented and tested later on :-)
> >>>>
> >>>> WanMil
> >>>>
> >>>>> Hi all,
> >>>>>
> >>>>> Garmin offers "curvy roads" preferences for their zümo 390 and 590 devices.
> >>>>> https://buy.garmin.com/en-US/US/on-the-road/motorcycles/zumo-390lm/prod138275.html
> >>>>> I'm thinking about creating motorcycle maps for old 200 series.
> >>>>> Might it be useful to integrate a curviness() function so that mkgmap can optimize for curvy roads too? It might also help do determine a better default speed for curvy roads for use with car routing.
> >>>>>
> >>>>> The curviness() value might be the overall absolute turning angle (in degrees) of a road segment divided by the segment's length.
> >>>>>
> >>>>> What's your opinion?
> >>>>>
> >>>>> Cheers
> >>>>> Manfred
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> Pseudo code might look like this:
> >>>>>
> >>>>> function curviness()
> >>>>> {
> >>>>> oldpoint=points(0)
> >>>>> foreach (point of a way segment as newpoint)
> >>>>>      {
> >>>>>      d_x=(newpoint.x-oldpoint.x)/360*40000000*COS(newpoint.x*PI()/180) //in meters
> >>>>>      d_y=(newpoint.y-oldpoint.y)/360*40000000 //in meters
> >>>>>      length+=sqrt(d_x**2+d_y**2)
> >>>>>      angle=arctan(d_y/d_x)
> >>>>>      d_angle=abs(angle-old_angle)
> >>>>>      sgn_x=sgn(d_x)
> >>>>>      sgn_y=sgn(d_y)
> >>>>>      if ((sgn_x*sgn_y*old_sgn_x*old_sgn_y)=-1 && (sgn_x!=old_sgn_x))  d_angle=pi-d_angle  // 180 degrees correction, otherwise north-south roads show strange results
> >>>>>      if (point>1) sum_angle+=d_angle
> >>>>>      old_angle=angle
> >>>>>      oldpoint=newpoint
> >>>>>      old_sgn_x=sgn_x
> >>>>>      old_sgn_y=sgn_y
> >>>>>      }
> >>>>> return sum_angle/length
> >>>>> }
> >>>>>
> >>>>> // perhaps simple multiplication is faster than 4 times sgn() functions?
> >>>>> _______________________________________________
> >>>>> mkgmap-dev mailing list
> >>>>> mkgmap-dev at lists.mkgmap.org.uk
> >>>>> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
> >>>>>
> >>>>
> >>>> _______________________________________________
> >>>> mkgmap-dev mailing list
> >>>> mkgmap-dev at lists.mkgmap.org.uk
> >>>> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
> >>> _______________________________________________
> >>> mkgmap-dev mailing list
> >>> mkgmap-dev at lists.mkgmap.org.uk
> >>> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
> >>>
> >>
> >> _______________________________________________
> >> mkgmap-dev mailing list
> >> mkgmap-dev at lists.mkgmap.org.uk
> >> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
> > _______________________________________________
> > mkgmap-dev mailing list
> > mkgmap-dev at lists.mkgmap.org.uk
> > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
> >
> 
> _______________________________________________
> mkgmap-dev mailing list
> mkgmap-dev at lists.mkgmap.org.uk
> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev