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[mkgmap-dev] Commit: r2724: Make sure that remove-short-arcs with no argument is evaluated with the default value (5.0)

From Gerd Petermann gpetermann_muenchen at hotmail.com on Thu Oct 3 11:01:35 BST 2013

Hi Felix,

good luck!

it is hard to say that a value is not causing problems, as it is not 
easy to find all routing problems in a map, not talking about
different maps for different areas of the world.
Whenever you change the value you might see an 
improvement in one or two places combined with
new errors somewhere else.
With current implementations use this rule:
The smaller the value, the smaller the optical
errors like zig-zag-ways, the higher the value,
the more likely small ways like steps are completely
removed, thus allowing to route over steps.

Gerd

Date: Thu, 3 Oct 2013 11:50:32 +0200
From: extremecarver at gmail.com
To: mkgmap-dev at lists.mkgmap.org.uk
Subject: Re: [mkgmap-dev] Commit: r2724: Make sure that remove-short-arcs with no argument is evaluated with the default value (5.0)


  
    
  
  
    my problems were on older versions - about 7 weeks ago if I remember
    correctly. Unsetting 5.4 to nothing (or 0.0) fixed it.

    I would have to retest which is the biggest value not causing
    probs...

    On 03.10.2013 11:35, Gerd Petermann
      wrote:

    
    
      
      Hi Felix,

        

        yes, the merging of nodes that happens when short arcs are

        removed is likely to cause errors, that's why I'd prefer to

        find alternatives.

        

        Still I think that you should use --remove-short-arcs=0 if you
        want a value

        of 0.

        

        Gerd

        P.S. Did you already try r2725 from the mergeroads branch, with
        or without the value 5?

        

        > Date: Thu, 3 Oct 2013 11:24:53 +0200

          > From: extremecarver at gmail.com

          > To: mkgmap-dev at lists.mkgmap.org.uk

          > Subject: Re: [mkgmap-dev] Commit: r2724: Make sure that
          remove-short-arcs with no argument is evaluated with the
          default value (5.0)

          > 

          > I'm not so sure this is the way to go....

          > At least for 5.4 on the remove-short-arcs - I got some
          very very strange 

          > routing errors - sometimes only in one direction - not in
          both 

          > directions... They disappeard on using 0.0 (though I'm
          not sure, if that 

          > caused other places routing problems...).

          > On 27.09.2013 09:24, svn commit wrote:

          > > Version 2724 was committed by gerd on Fri, 27 Sep
          2013

          > >

          > > Make sure that remove-short-arcs with no argument is
          evaluated with the default value (5.0)

          > > _______________________________________________

          > > mkgmap-dev mailing list

          > > mkgmap-dev at lists.mkgmap.org.uk

          > >
          http://lists.mkgmap.org.uk/mailman/listinfo/mkgmap-dev

          > 

          > _______________________________________________

          > mkgmap-dev mailing list

          > mkgmap-dev at lists.mkgmap.org.uk

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