[mkgmap-dev] PATCH v1: highwayCount

Fri Feb 8 08:43:49 GMT 2013

Hi Felix,

Felix Hartmann-2 wrote
> Routing over long distances is not working at all anymore (much much 
> worse to before).
> Don't have time (need to sleep) to find out if any roads become 
> unroutable though...

please check: Are you still using this option?
--x-reduce-point-density-polygon=6

1) It seems to be the reason for the broken routing (also in the trunk
version)
2) althrough not documented, it is interpreted as
--reduce-point-density-polygon=6
The help file for this option says that the recommended value is 8, but if
the value is
not specified, it uses the value from reduce-point-density.
If both are not specified, the default for both is 2.6 

I assume that you use the higher values because you see the 
severe "Area to small to split at ..." messages. Please ignore them
as long as you don't see empty img files or try the 
MapArea_v1.patch 
http://gis.19327.n5.nabble.com/Why-do-we-have-the-Area-too-small-to-split-at-message-tp5744612p5744766.html

@Steve:
I have no good idea why this option breaks routing over long distances.
It just changes the way how DouglasPeucker works for shapes. 
The higher the value, the more points of shapes are removed.
Maybe fewer shapes are written, maybe more sub divisions are empty.
Any hints?

Gerd

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