[mkgmap-dev] [Patch] improve handling of only-restrictions with via ways

Thu Oct 10 19:51:21 BST 2019

Hi Gerd

I didn't get any errors with release version, default style and minimal
options. Using my style and minimal options works, but I get the
problem when I use --link-pois-to-ways and my style/points has rules
like:

barrier=* {set mkgmap:road-speed=1}
highway=traffic_signals | highway=crossing {set mkgmap:road-speed=1}

I expect this explains most of the "can't locate arc" errors.

Don't worry about any of this on my behalf - I suspect this could be
complicated to solve.

Ticker

On Thu, 2019-10-10 at 19:23 +0100, Ticker Berkin wrote:
> Hi Gerd
> 
> Sorry about the delay.
> 
> The bounds of the tile are:
> 
> 4220083: 2400256,-4096 to 2414592,6144
> #       : 51.503906,-0.087891 to 51.811523,0.131836
> 
> error@  : 51.541949, 0.004060 - so looks reasonably central to the
> tile
> 
> I do have cycleway as routable, but I'll run again with release 4295,
> default style and minimal options.
> 
> Ticker
> 
> On Thu, 2019-10-10 at 17:35 +0000, Gerd Petermann wrote:
> > Hi Ticker,
> > 
> > I cannot reproduce the error with the trunk version and default
> > style.
> > Maybe your style doesn't add highway=cycleway as routable way?
> > 
> > Gerd
> > 
> > ________________________________________
> > Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag
> > von Gerd Petermann <gpetermann_muenchen at hotmail.com>
> > Gesendet: Donnerstag, 10. Oktober 2019 19:03
> > An: Development list for mkgmap
> > Betreff: Re: [mkgmap-dev] [Patch] improve handling of only
> > -restrictions with via ways
> > 
> > Hi Ticker,
> > 
> > I'll try to reproduce the duplicate error tomorrow. I think mkgmap
> > should stop processing the restriction relation when the initial
> > (complete) processing produces such a message.
> > Please let me know the area for tile 74220083 in case the relation
> > is
> > not completely within the bounds of that tile.
> > 
> > Gerd
> > 
> > ________________________________________
> > Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag
> > von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
> > Gesendet: Donnerstag, 10. Oktober 2019 18:14
> > An: Development list for mkgmap
> > Betreff: Re: [mkgmap-dev] [Patch] improve handling of only
> > -restrictions with via ways
> > 
> > Hi Gerd
> > 
> > No problems that I can see - but very difficult to test.
> > 
> > I've run 'british-isles-latest' with the patch.
> > 
> > There is 1 extra error message that a duplicate, ie I get:
> > 
> > SEVERE (RoadNetwork): 74220083.osm.pbf: Turn restriction
> > (only_straight_on) http://www.openstreetmap.org/relation/8727983 (a
> > t
> > http://www.openstreetmap.org/?mlat=51.541969&mlon=0.004312&zoom=17)
> > can't locate arc from 'via' node at
> > http://www.openstreetmap.org/?mlat=51.541949&mlon=0.004060&zoom=17 
> > to
> > next 'via' node on way 642330324
> > 
> > SEVERE (RoadNetwork): 74220083.osm.pbf: Turn restriction
> > (only_straight_on) http://www.openstreetmap.org/relation/8727983 (a
> > t
> > http://www.openstreetmap.org/?mlat=51.541969&mlon=0.004312&zoom=17)
> > can't locate arc from 'via' node at
> > http://www.openstreetmap.org/?mlat=51.541949&mlon=0.004060&zoom=17 
> > to
> > next 'via' node on way 642330324
> > 
> > Whereas before I only got this message once. This is a restriction
> > with
> > 3 via's.
> > (I get 12 other messages relating to restrictions)
> > 
> > For all but this tile, the .img files are the same size and,
> > picking
> > a
> > few examples, the NET and NOD parts are identical.
> > 
> > For this tile the NET parts are identical but the NOD is not really
> > comparable because of different sizes / offsets.
> > 
> > pre-patch size:  10102784 Oct 10 11:52 74220083.img
> > post-patch size: 10104832 Oct 10 15:58 74220083.img
> > 
> > Ticker
> > 
> > 
> > 
> > On Thu, 2019-10-10 at 09:49 +0000, Gerd Petermann wrote:
> > > Hi all,
> > > 
> > > in 
> > > http://gis.19327.n8.nabble.com/Turn-Restrictions-using-three-ways
> > > -
> > > design-guide-for-OSM-mappers-tp5949183.html
> > > Thanks to blc I've learned that only_* restrictions with via ways
> > > should be interpreted a bit different. As you might know the
> > > Garmin
> > > IMG format only has restrictions of type "no", so mkgmap has to
> > > translate "only" restrictions to a list of "no" restrictions. For
> > > those "only" restrictions the current code in version r4295
> > > checks
> > > the roads connected to  (the last) "via"-node and adds a "no"
> > > restriction for all ways except the "to"-way.
> > > The meaning of an "only" restriction with "via"-way(s) is a bit
> > > different . I means something like "once you have reached the
> > > node
> > > that connects the "from"-way with the (first) "via"-way
> > > travelling
> > > on
> > > the "from" way you MUST use the route described in the
> > > restriction
> > > relation unless you have reached the "to" way.
> > > So, mkgmap must add restrictions for each route node on the "via"
> > > -way(s), not only the last.
> > > 
> > > The patch implements this and no longer prints a warning for
> > > "only"
> > > -restrictions with "via" ways (severity was changed from warning
> > > to
> > > information).
> > > 
> > > I've uploaded a binary here:
> > >  http://files.mkgmap.org.uk/download/452/mkgmap.jar
> > > 
> > > If I hear no complains I'll commit this patch next Monday.
> > > 
> > > Gerd
> > > _______________________________________________
> > > mkgmap-dev mailing list
> > > mkgmap-dev at lists.mkgmap.org.uk
> > > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
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