[mkgmap-dev] New splitter version, big memory savings

Thu Sep 3 15:54:23 BST 2009

Very good point. I guess if someone came across such a situation a nasty 
workaround would be to increase the --overlap value by enough to make the 
problem go away, though that would likely introduce other problems (memory 
usage, performance, nodes in > 4 areas, ...).

A proper fix would require some extra analysis of the 'big ways' or 'big 
relations' (the splitter is already vaguely aware of these) to decide how 
best to deal with them. But that's not something I feel like implementing 
if it can be helped :)

Chris

SR> I'm not sure if this what Lambertus was thinking of but what about
SR> polygons that completely encircle a tile, or are so big that they
SR> cut across a tile in such a way that joining up the nodes in the
SR> overlap area cuts across the tile.  I don't think those things can
SR> work.
SR> 
SR> Probably doesn't happen for real though.  Certainly no one has
SR> reported a case where that appeared to happen.
SR> 
SR> ..Steve
SR> 