[mkgmap-dev] [Patch v1] overlaid lines shifted

Mon May 6 21:51:17 BST 2013

thanks Gerd,

patch is working perfectly (so far as I can tell)...
On 05.05.2013 03:39, Gerd Petermann wrote:
> Hi,
>
> see first
> http://gis.19327.n5.nabble.com/merge-lines-and-routing-tp5758913p5759595.html
>
> I think the reason is the remove-short-arcs processing. This can move 
> a road,
> esp. if you use a rather large value like --remove-short-arcs=5.4. In 
> the example case, way http://www.openstreetmap.org/browse/way/27904971
> is moved towards
> http://www.openstreetmap.org/browse/way/217767494
>
> Now, the overlaid line with  type 0x10650 (really this invalid 
> extended type?)
> is not a road and stays where it belongs. Another possible effect 
> would be that the road
> is deleted while the copy is not.
> I think the solution is to make sure that
> 1) all lines created from the same OSM way have the same points after
> short-arc-removal was done with roads only
> 2) if short-arc-removal deletes a road (e.g. because it only has one 
> short arc),the other lines
> for the same OSM way are deleted as well.
>
> Attached is a patch that implements this, a compiled binary is here:
> |http://files.mkgmap.org.uk/download/120/mkgmap.jar|
>
> Gerd
>
>
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