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