Wwat would happen as far as routing is concerned if I download 3 different countries from Geofabrik and then combine them in a single file...e.g I download england, scotland, wales and then run java -Xmx2048M -jar mkgmap.jar --latin1 --gmapsupp --route --region-name="abc" --region-abbr="abc" --max-jobs --remove-short-arcs --net --code-page=1252 --country-name="abc" --country-abbr=abc --tdbfile --tdb-v4 --description="abc" england.osm scotland.osm wales.osm What I'm expecting is that routing within each country will work but routing across borders won't I've created a map with the above options and whilst what I expect to happen does seem to be happening I thought I'd check On a related note if I were to create separate england.img, scotland.img, wales.img files and then combine them into a single gmapsupp.img which of the family-name, map-name, series-nam etc options would I need for the individual files and for the combination step so that I could turn the individual maps on or off? Cheers Paul