[mkgmap-dev] Overlays and routing

Sun Aug 23 12:42:06 BST 2009

MarkS wrote:
> I've just discovered the overlays file but eveytime I use it routing 
> breaks for any road where an overlay is used (mapsource either crashes 
> or it just draws a straight line). These are very short routes (a few 
> hundred meters) and work if I turn the overlay off.
>
> I'm confident the overlay is working because I can see the extra way in 
> mapsource and GPSMapedit.
>
> Should routing work with an overlay or am I wasting my time?
>
> Details:
>
> Mkgmap version: 1122
>
> overlays file contains just this:
>
> 0x123:   0x23, 0x02
>
> the lines file contains (amongst lots of other non overlay things):
>
> highway=trunk & oneway=yes [0x123 road_class=3 road_speed=5 resolution 16]
>
> I've tried values other than 0x23 in the overlays, all produce the same 
> result but values over about 0x2c don't display in mapsource.
>   
0x23 is a non-routable type. Try 0x03 and 0x02 for example and it should 
work.
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