[mkgmap-dev] documentation of new option in branch

Mon Nov 4 15:37:07 GMT 2019

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

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