[mkgmap-dev] Bug in Road Merging - actually doubling roads.

Thu Mar 29 14:39:34 BST 2018

Hi Henning,

well, I can start to code the test to detect and report overlapping highways. Maybe there is a way to fix some of them automatically,
but I'd really prefer to just report them so that they are fixed in OSM. In most cases this should be easy.

Gerd

________________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Henning Scholland <osm at hscholland.de>
Gesendet: Donnerstag, 29. März 2018 13:48:46
An: Development list for mkgmap
Betreff: Re: [mkgmap-dev] Bug in Road Merging - actually doubling roads.

Hi Gerd,
A hopefully easy solution could be to just take the first connection between two nodes and if there will be a second one, just copy name-tag for house numbers and then skip that second way. Or just report them. Can be two options like: - - duplicate-ways=remove/report

Henning
On 29 Mar 2018, at 09:32, Gerd Petermann <gpetermann_muenchen at hotmail.com<mailto:gpetermann_muenchen at hotmail.com>> wrote:

Hi Felix,

sorry to hear. I am running out of ideas for a simple patch  :-(
Maybe it is not the number of arcs with the same initial bearing but the number of arcs going to the same destination node.

Anyway, seems we really have to remove overlapping parts of roads much earlier to make your style work in that situation,
and I think this would open a new box of worms reg. housenumbers, turn restrictions and so on, in other words,
I fear we might add a lot of complex code that is rather bad for other users.
So, maybe it would be better to just fix those errors in OSM?

Gerd

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Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Felix Hartmann <extremecarver at gmail.com>
Gesendet: Mittwoch, 28. März 2018 23:10:16
An: Development list for mkgmap
Betreff: Re: [mkgmap-dev] Bug in Road Merging - actually doubling roads.

Sorry for taking so long - needed to setup a new desktop computer with my old mainboard dead. The new patch does not really seem to improve anything. It's not dropping the route in simulation mode anymore - but getting stuck and not routing along.

On 23 March 2018 at 09:50, Felix Hartmann <extremecarver at gmail.com<mailto:extremecarver at gmail.com>> wrote:
Well all the problems about problematic arcs so far came up from a combination of two things:
a) my style creates two additional ways (bit different road_class/road_speed based on input) if the following is met: route relation hiking, bicycle or mtb | ( mtb:scale>0 & mtb:scale<5) | class:bicycle>1. Additionally if a road is oneway - and it's a low level road (so neither motorway,trunk,primary,secondary,tertiary) - and oneway, a low class/speed non oneway road is added as well (intention to have lower priority against the oneway than driving with the oneway direction. Also additionally if bicycle lane against the traffic flow is possible, it will create a line against the oneway.
b) mistakes in OSM data where wrongly several objects lie on top of each other.

Sorry my computer crashed yesterday evening, and I cannot boot it right now. Seems my Mainboard is dead. So I probably won't have possibilities for testing before Monday or Tuesday.

On 23 March 2018 at 09:39, Gerd Petermann <gpetermann_muenchen at hotmail.com<mailto:gpetermann_muenchen at hotmail.com>> wrote:
Hi Henning,

Henning Scholland wrote
 Hi Gerd, I just was thinking about if one road is leaving the roundabout
 at two angles it may count on the Garmin as two roads and will lead to
 'exit on 3rd exit' instead of 'exit on 2nd exit' for example.

 But I haven't gave it a try yet.
 ⁣

ah, okay, got it. I think Garmin should calculate the number for the exit
without "thinking" about the further
route but who knows.
I'd like to test it on my own but I found it too difficut to create a style
that tries to do the same as Felix'
style, and you don't get the same results when you simply add overlapping
highways in JOSM.

I am not aware of another style that adds multiple routable ways for one OSM
way, and Felix doesn't want to share his, so testing is his work. I can only
make educated guesses about the effects,
and of course I'll test it with other styles before committing it.

Gerd

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Felix Hartman - Openmtbmap.org<http://Openmtbmap.org> & VeloMap.org<http://VeloMap.org>
Schusterbergweg 32/8
6020 Innsbruck
Austria - Österreich
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