Hello list, I've been trying to build a reproduceable case where tooltips (in Mapsource) are missing on a map boundary; this seems to correlate with the map blanking when you zoom in to 70, 50, 30 and 20m level. I sort of succeeded, but I cannot find a clue to what causes this. I ran the following submap, it has a problem when you zoom into the 0x251000 boundary (the lower boundary of the map): 63240008: 0x251000,0x25000 to 0x255000,0x39000 But then: when you increase or decrease the map size, the lower boundary will show again! So having latitude 0x251000 - 0x253000 is no problem; 0x251000 - 0x257000 is not a problem, too. I also tried to narrow this down to certain map details, like taking out all "too many areas" ways; I also opened the map in JOSM (which shows a couple of errors about ways it skips because of missing nodes), then save the file again, but this doesn't change anything. So for the moment, I basically ran out of ideas. I will try to split the resulting map some more, and will also try if a different overlap makes any difference. Also, running this split on a newer map of the Netherlands could also change things - I don't know, I will try. I'm still hoping to get a trivial diff between a map that works and a map that doesn't work - if I do, I will mention it here. If anyone else finds something (maybe you even find that running the split above will give you a map that will let you zoom into it - please let me know. Just for the record: java -Xmx1600m -enableassertions -jar splitter.jar --split-file=see-above netherlands.osm # where netherlands comes from # http://download.geofabrik.de/osm/europe/netherlands.osm.bz2 Splitter is the most recent, including a rather trivial patch so that it will read hex numbers in the areas.list file (I sent that on the list a couple of days before). (Steve, if there's nothing against it, could you add it to Splitter, please?) My mkgmap command is: java -enableassertions -Xmx1800m -jar ~/garmintest/mkgmap/dist/mkgmap.jar --country-name=Nederland --country-abbr=NL --latin1 --remove-short-arcs --lower-case --route --preserve-element-order --location-autofill-1 --gmapsupp --tdbfile --net -c template.args with mkgmap being the latest version (I think 1097, compiled from source). Maybe someone else has a good idea. I hope that the split above will still yield wrong results with a more recent Netherlands file; otherwise, I'll put the resulting 63240008.osm.gz on the web somewhere, maybe that will help. Best regards, Valentijn