[mkgmap-dev] Estrange detours

Thu Jan 5 20:34:40 GMT 2017

That could explain detour at point 2, but I have tried downgrading 
implied roads up to tertiary with no routing change. Point 1 is a 
straight road, but MapSource prefers to turn right and then left instead.

El 05/01/17 a las 21:13, Gerd Petermann escribió:
> Hi,
>
> my understanding so far is that the Garmin algo doesn't like a rather sharp turn on a road with
> highway=trunk [0x02 road_class=4 road_speed=5 resolution 18]
>
> In Germany a trunk road is nearly like a motorway and it seems that the above rule is good for this.
> Maybe we should add country specific rules here?
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Carlos Dávila <cdavilam at orangecorreo.es>
> Gesendet: Donnerstag, 5. Januar 2017 21:01:57
> An: Development list for mkgmap
> Betreff: Re: [mkgmap-dev] Estrange detours
>
> El 05/01/17 a las 19:05, Andrzej Popowski escribió:
>> Hi Carlos,
>>
>> I have your example tested in BaseCamp and I don't see any problems at
>> point 1. At point 2 weird routing appears only for track and camper.
>> It could be due to angle at crossroad. I could get normal turn right
>> after changing geometry of this crossroad, as in attached picture.
>>
>> I think there were some changes in mkgmap dealing with angels between
>> roads. Maybe this code should be reviewed?
> Hi Andrzej
> Your findings in BaseCamp match what I found. I guess the problem comes
> from the angle between crossing roads, but modifying it as in your
> picture would be "tagging for the render" I suspect;-). Current angle
> between those two streets is wider than 90º and it shouldn't be avoided
> for routing anyway.
> Attached is a picture with the correct chart
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>

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