[mkgmap-dev] U-turn restriction via way instead of node

Sun Oct 25 21:37:32 GMT 2009

Hi Marko,

On Sun, 25 Oct 2009 23:29:01 +0200
Marko Mäkelä <marko.makela at iki.fi> wrote:

> I remember that this was discussed some weeks ago, but I cannot remember if
> a final conclusion was reached.
> 
> Certain types of these U-turn restrictions can be rewritten as
> only_straight_through.  For instance, the only_straight_through
> relation on Itäkatu (southbound) also prevents a U-turn from
> Itäkatu (southbound) via Kehä I (east) to Itäkatu (northbound):
> at http://www.openstreetmap.org/browse/relation/32875
> 
> When ways have been split to opposing oneway lanes, a via node must
> be replaced with a via way, like this:
> http://www.openstreetmap.org/browse/relation/59928
> However, mkgmap will not like it:
> 
> 2009/10/25 21:53:00 WARNING (RestrictionRelation): Turn restriction 59928 (http://www.openstreetmap.org/?lat=60.21242&lon=25.08756&zoom=17) 'via' member 4775828 is not a node
> 
> Can this kind of turn restrictions be represented in the Garmin format?

At this time, we don't know how to do that. It may or may not be
possible, we simply don't know.

Cheers,

Mark