R: [mkgmap-dev] [PATCH v2] - beware of the bollards!

Tue Jul 7 16:59:48 BST 2009

--- Mar 7/7/09, Mark Burton <markb at ordern.com> ha scritto:

> Da: Mark Burton <markb at ordern.com>
> Oggetto: Re: R: [mkgmap-dev] [PATCH v2] - beware of the bollards!
> A: mkgmap-dev at lists.mkgmap.org.uk
> Data: Martedì 7 luglio 2009, 17:50
> 
> Hi Marco,
> 
> > Mark, may I suggest a totally different approach?
> > 
> > why not to use a couple of restriction relations?
> > 
> > a no_straight_on between the segment before (from) and
> after (to) the bollard node (via) and a second
> no_straight_on relation the way round.
> > 
> > Of course with the right "except": bicycle, foot, ...
> >
> > You could also invent an "internal" relation
> restriction like "no_passage"
> > 
> > The issue here seems that the "except" key does not
> foresees "foot".
> > 
> > Would it be feasible?
> 
> I don't think so because turn restrictions affect all
> traffic except
> foot so you could not distinguish between a car and a
> bicycle.

Mark, the wiki page about restrictions

http://wiki.openstreetmap.org/wiki/Relation:restriction

says I can put a key except with the following values/meaning:

except - psv/bicycle/hgv/motorcar - The restriction does not apply to these vehicle types (more than one: except=bicycle;psv) 

So do you mean that mkgmap does not actually support/handle the except key in a relation restriction?

Ciao, Marco.

> 
> Cheers,
> 
> Mark
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