[mkgmap-dev] sharp angles and routing

Tue Aug 11 09:57:46 BST 2015

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

          To: 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>
              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

                _______________________________________________

                mkgmap-dev mailing list

                mkgmap-dev at lists.mkgmap.org.uk

                http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev

            -- 

                    Felix Hartman - Openmtbmap.org &
                      VeloMap.org

                    Floragasse 9/11

                  1040 Wien

                Austria - Österreich

          _______________________________________________
          mkgmap-dev mailing list
          mkgmap-dev at lists.mkgmap.org.uk
          http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev

      _______________________________________________
mkgmap-dev mailing list
mkgmap-dev at lists.mkgmap.org.uk
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev

    -- 
keep on biking and discovering new trails

Felix
openmtbmap.org & www.velomap.org

_______________________________________________
mkgmap-dev mailing list
mkgmap-dev at lists.mkgmap.org.uk
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.mkgmap.org.uk/pipermail/mkgmap-dev/attachments/20150811/450d5853/attachment-0001.html>