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@lists.mkgmap.org.uk> im Auftrag von Pinns UK <osm@pinns.co.uk> Gesendet: Montag, 4. November 2019 16:29 An: mkgmap-dev@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@lists.mkgmap.org.uk<mailto:mkgmap-dev@lists.mkgmap.org.uk> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev