[mkgmap-dev] [BUG and PATCH] Use of overlay style file breaks routing, fix attached

Wed May 27 21:46:06 BST 2009

When using the overlays style file it will break the routing of the  
map. The reason seems to be that if routable ways are overlayed they  
get added several times as routable ways. The attached patch will add  
only the first overlay type as a routable way and the other overlay  
types as lines. It will also copy the list of points instead of just  
passing on the pointer (don't know whether that is necessary).

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By the way: when experimenting with overlays I can not control which  
line of the overlay is painted first, it seems to change randomly.  
Anybody has an idea why this is so? The LineAdder gets the ways always  
in the same order. Does they get mixed up somewhere in mkgmap or does  
the GPS unit do some strange stuff?

Regards
Thilo