[mkgmap-dev] sharp angles and routing

Tue Aug 11 10:31:35 BST 2015

okay - sounds great...
(as new devices do not really mind mkgmap:bicycle=no it does not matter 
so much anymore - I'm only setting pedestrian restrictions different to 
all others for my maps )

On 11.08.2015 10:57, Gerd Petermann wrote:
> Hi Felix,
>
> My current approach is to evaluate the results of the style, so it is 
> up to the author to decide what
> a pedestrian-only way is.
> Another point is that we don't need the check for ways which can't be 
> accessed
> by bike. I am aware that these checks must be ignored when a special 
> cycling
> map is created (or any other special map, we just have to find out 
> meaningful
> option names)
>
> I am trying to produce test data to find out in what case Garmin 
> prefers a small detour,
> this should help to find concrete rules.
>
> Gerd
>
> ------------------------------------------------------------------------
> To: mkgmap-dev at lists.mkgmap.org.uk
> From: extremecarver at gmail.com
> Date: Tue, 11 Aug 2015 10:44:06 +0200
> Subject: Re: [mkgmap-dev] sharp angles and routing
>
> Well - what is a strict pedestrian only way? highway=pedestrian - 
> often can be used with bikes too (going slower)
> highway=footway -- often still outside cities and used for mtbiking 
> though maybe not allowed.
> highway=path &  bicycle=no ---> very often nice mtbike trails in 
> countries where mtbiking is mainly forbidden like Baden-Wuerttemberg 
> or Austria.
>
>
> And yeah - oneways could be excluded - but needs some care to not 
> exclude them (for cycling maps) if oneway:bicycle=no; 
> bicycle:oneway=no; oneway:bicycle=both; ( cycleway=* & 
> cycleway!=oneway ) would be the most common keys which mean cycling 
> against oneway direction is allowed.
>
> For me excluding all ways that get tagged road-class=0 or 1, and 
> road-speed=0 could be excluded (but sometimes I use continue and 
> double ways so it exists with say road-class=4, road-speed=2 as well 
> as road-class=0, road-speed=0 in order to get me through sharp turns - 
> if the sharp angle fixing would work well - maybe I could drop this).
>
> On 11.08.2015 09:52, Gerd Petermann wrote:
>
>     Hi Felix,
>
>     okay, I just try to find some criteria so that we find those nodes
>     + arcs which really cause
>     trouble. A lot of sharp angles are between oneway roads which
>     don't allow traveleling
>     the sharp angle.
>     I think that also means that I can add code to ignore sharp angles
>     on pedestrian-only
>     ways.
>
>     Gerd
>
>     ------------------------------------------------------------------------
>     Date: Tue, 11 Aug 2015 09:39:11 +0200
>     From: extremecarver at gmail.com <mailto:extremecarver at gmail.com>
>     To: mkgmap-dev at lists.mkgmap.org.uk
>     <mailto:mkgmap-dev at lists.mkgmap.org.uk>
>     Subject: Re: [mkgmap-dev] sharp angles and routing
>
>     Well - not in Pedestrian mode. I meant if you design a map with
>     road-class=4 as preferred way for pedestrians... Then of course
>     using a non pedestrian profile for routing so it chooses
>     road-class=4 or 3 preferably.
>     For Pedestrian mode chosen - there is no time penalty for sharp
>     turns - though I did not test if it would prefer ways that point
>     towards the destination at intersections.
>
>     On 11 August 2015 at 09:30, Gerd Petermann
>     <gpetermann_muenchen at hotmail.com
>     <mailto:gpetermann_muenchen at hotmail.com>> wrote:
>
>         Hi Felix,
>
>         please check:
>         you said that sharp angles also have an effect on pedestrian
>         routing,
>         I was not able to reproduce that. Can you give an example?
>
>         Gerd
>
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>
>
>
>     -- 
>     Felix Hartman - Openmtbmap.org & VeloMap.org
>     Floragasse 9/11
>     1040 Wien
>     Austria - Österreich
>
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>
> -- 
> keep on biking and discovering new trails
>
> Felix
> openmtbmap.org &www.velomap.org <http://www.velomap.org>
>
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-- 
keep on biking and discovering new trails

Felix
openmtbmap.org & www.velomap.org

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