[mkgmap-dev] documentation of new option in branch

Mon Nov 4 16:27:29 GMT 2019

Hi
So basically this is a global:

set mkgmap:set_unconnected_type=none;

Or is there a difference? I've used the unconnected_type and semi_connected
type basically for all routable lines in my style-file. The
unconnected_type is now obsolete if you just used to disable routing by
setting an unroutable type - correct?

Have you tested that the global option is run after semi_connected_type and
unconnected_type? Because first the style should be able to remove them or
change them to unroutable type - then leftover islands should be covered
with this method.

Felix

On Mon, 4 Nov 2019 at 17:06, Ticker Berkin <rwb-mkgmap at jagit.co.uk> wrote:

> Hi
>
> I think the default should be either:
>   Don't check for routing islands
> or:
>   Check for and remove islands of any length
> but I don't feel that strongly about this aspect.
>
> In the documentation, it should mention the effect of a road meeting a
> tile boundary or boundary nodes added at admin boundaries.
>
> I've been using this feature for a couple of weeks now and it has
> stopped a lot of "Route Calculation Error"s - Thanks Gerd.
>
> Ticker
>
> On Mon, 2019-11-04 at 15:37 +0000, Gerd Petermann wrote:
> > Hi Nick,
> >
> > as always the information is written with the logger (1). You have to
> > activate logging at info level with
> > uk.me.parabola.imgfmt.app.net.RoadNetwork.level=INFO
> >
> > (1) https://wiki.openstreetmap.org/wiki/Mkgmap/dev#Enabling_Debugging
> >
> > Using a negative value for NUM means that mkgmap doesn't calculate
> > the islands at all, using
> > 0 means that it only reports the islands. If you want to remove
> > islands you can start with a value like
> > 500. The default is 0.
> >
> > Gerd
> >
> > ________________________________________
> > Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag
> > von Pinns UK <osm at pinns.co.uk>
> > Gesendet: Montag, 4. November 2019 16:29
> > An: mkgmap-dev at lists.mkgmap.org.uk
> > Betreff: Re: [mkgmap-dev] documentation of new option in branch
> >
> > Hi Gerd
> >
> > Thanks for all you work with regards routing islands!
> >
> > a) Is there a way of finding out how many .if any. routing islands
> > were found given a certain length?
> >
> > b)  if NUM is negative is there any point in adding --check-routing
> > -island-len=NUM
> >
> > Nick
> >
> >
> >
> > On 04/11/2019 13:58, Gerd Petermann wrote:
> >
> > Hi all,
> >
> > I think the work on the branch is almost done.
> > Attached is a patch to add documentation for the new option.
> > Please help to improve it:
> >
> > --check-routing-island-len=NUM
> >         Routing islands are small road networks which are not
> > connected to other
> >         roads. Typical case is a footway that is not connected to the
> > main road
> >         network. These islands can cause problems if you try to
> > calculate a route
> >         and Garmin selects a point on the island as a start. It will
> > fail to
> >         calulate the route even if a major road is only a few steps
> > away.
> >         When calculating the NOD data mkgmap detects the islands. The
> > option
> >         --check-routing-island-len=NUM can be used to tell mkgmap
> > that islands with
> >         a total length below NUM meters should not be written to NOD.
> > The effect is
> >         that the corresponding roads are visible as usual but they
> > are not
> >         routable.
> >         A negative value for NUM means that mkgmap skips the island
> > check.
> >
> > ciao
> > Gerd
> >
> >
> >
> > _______________________________________________
> > mkgmap-dev mailing list
> > mkgmap-dev at lists.mkgmap.org.uk<mailto: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
> _______________________________________________
> 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
Schusterbergweg 32/8
6020 Innsbruck
Austria - Österreich
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.mkgmap.org.uk/pipermail/mkgmap-dev/attachments/20191104/232d9094/attachment.html>