Hi Marko, just to make sure: The example shows a no_u_turn restriction where "from" way and "to" way are equal and a via node is used. Are that the criteria which should tell mkgmap to emit an info and ignore the restriction? Why not a warning? I'd say all correct restriction relations which are ignored should produce a warning. Gerd
Date: Tue, 1 Apr 2014 16:10:52 +0300 From: marko.makela@iki.fi To: mkgmap-dev@lists.mkgmap.org.uk Subject: Re: [mkgmap-dev] Turn restriction angle checks
On Sun, Mar 30, 2014 at 02:34:07PM +0200, Gerd Petermann wrote:
BTW, I accidentally loaded a relation somewhere in Russia and downloaded the surroundings. There were lots of no_u_turn on every crossing of a major road. That kind of micro-mapping does not exist over here; I guess that mappers expect people to apply common sense and not make a u-turn as soon as the navigator suggests it, no matter what.
I found an example of this in Finland. IMO, these relations should simply be ignored, maybe emitting a NOTE or INFO (not WARNING):
2014/04/01 08:03:24 SEVERE (RoadNetwork): 63240002.osm.pbf: Turn restriction http://www.openstreetmap.org/browse/relation/1785864 (at http://www.openstreetmap.org/?mlat=60.224055&mlon=24.995477&zoom=17) check special case from = to arc
Normally the navigator should not generate routes where you do a U-turn like this. Even if it did, the driver should know to make the U-turn at the next convenient place where it is both practical and not forbidden.
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