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

Thu Jul 3 19:49:58 BST 2014

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
>>>
>>
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