[mkgmap-dev] PATCH v1: highwayCount

Fri Feb 8 09:48:24 GMT 2013

oops, seems I was trapped by some caching in BaseCamp. 

--x-reduce-point-density-polygon=6 doesn't break routing.

Gerd

GerdP wrote
> 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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