[mkgmap-dev] Inter-Tile Routing for Maps with several tiles made from the same area

Thu Feb 19 23:21:47 GMT 2009

Great, routing across does not only work on tiles split with the 
osm-splitter, but also works if you produce tiles from the same are. I.e 
you can take austria.osm and use two different style-files one where the 
file "lines" includes motorways, trunk roads, primary roads and 
secondary roads, and another tile linking up all other roads. Routes can 
be calculated as if the roads were all on the same tile (at least in 
Mapsource - haven't yet tried on my etrex). This is with maps created 
directly from OSM without osm2mp.

On the other hand autorouting does not seem to work if I try to route 
between a Point on Street A and a Point on Street B with the streets not 
being connected (in Austria very often due to the data import by plan.at 
streets are intersecting without having a connecting node - however 
often also streets are not connected due to user error), in this case 
the whole route will only be done as a straight line, instead of routing 
the main part and then only routing via "air" for the not connected 
parts. It would be great if there could be added an option to 
autoconnect highways before compiling. (I do understand that this will 
be not easy, but I don't think with the volatile format of OSM we can 
ever get really usable autorouting without adding some intelligent 
mechanism here)