1. I noticed that (at least for my style-file) 7500MB of RAM available does not suffice to compile a map of Europe including index! However if I recreate the index in another go, then it is no problem. How comes? The index creation seems to be completly independent of the maptiles creation. Is mkgmap leaving stuff inside the memory, that is in reality not needed anymore? 2. Also as running out of memory primarily happens on index creation, it would be great if mkgmap writes out the index under a temporary name, and once it has passed correctly, renames the file. Else it is not possible to easily assess in a bash/batch script whether mkgmap completed the map correctly or not (and hence one uploads broken maps if everything automated). Or at least I don't see any way to find out whether it passed correctly or not.