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[mkgmap-dev] Commit: r1377: Limit length of lines to work around problems when subdividing long lines.

From Marko Mäkelä marko.makela at iki.fi on Thu Nov 12 10:03:41 GMT 2009

Hi Mark, Felix,

On Thu, Nov 12, 2009 at 09:30:17AM +0000, Mark Burton wrote:
> Hi Felix,
> > I am not sure which of todays changes is responsible, but routing in 
> > Mapsource became a lot worse! Often I get routes 10-30% longer or on 
> > less priorised ways than before, this is a drastic example but happens 
> > on every 10 route:
> > 
> > Yellow route is old SVN 1773, pink is newest SVN version (yellow is 
> > 17.8km and 33 minutes, pink is 26.5km and 56 minutes):
> > 
> Please try increasing the values of MAX_ARC_LENGTH and MAX_LINE_LENGTH
> and see if that improves things. I would not expect MAX_LINE_LENGTH to
> make a difference as that only influences lines not routable ways.
> If the reduction in MAX_ARC_LENGTH is causing your routing to become
> worse, that's going to conflict with the issue Marko reported.

The Nuvi user reported that he is still having routing trouble with
the MAX_ARC_LENGTH=39062 that I used in conjunction with r1366.
I asked him to experiment with different values of MAX_ARC_LENGTH.
You reduced the parameter to 35000, IIRC.


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