[mkgmap-dev] turn restrictions relations are lost when using `--remove-short-arcs`

Tue May 15 07:04:54 BST 2012

On Tue, May 15, "Michael Günnewig" wrote:

> Hi.
> 
> On Tue, May 15, 2012 04:19, maning sambale wrote:
> > Reported here: https://github.com/maning/osmphgps/issues/48
> >
> > Apparently, relation information on turn-restrictions were lost when
> > using `--remove-short-arcs`.  Compiling without the
> > `--remove-short-arcs` directive solves the issue.  My assumption is
> > that the `remove-short-arcs` directive is processed after routing
> > creation, it seems to be the other way around.
> 
> I guess this is caused by the quite large minimum arc length of 5 meters. 
> Essentially this means that all points not further away then 5 meters are
> one point and it would be quite difficult and time consuming to adapt all
> turn restrictions accordingly.
> With the default value of 0 (--remove-short-arcs) you should be fine though.

I run into the same issue with ignored turn restrictions myself
some time ago, but was never able to track that somehow down. I'm
using --remove-short-arcs only.

  Thorsten

-- 
Thorsten Kukuk, Project Manager/Release Manager SLES
SUSE LINUX Products GmbH, Maxfeldstr. 5, D-90409 Nuernberg
GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB 16746 (AG Nürnberg)