[mkgmap-dev] Routing (and other) woes

Fri Feb 20 00:42:32 GMT 2009

Hi Michel,

> When routing with a mkgmap (svn rev. 907) generated routable map, my 
> nüvi gets seriously confused about this area:
> 
> http://www.openstreetmap.org/?lat=47.44357&lon=8.69386&zoom=17&layers=B000FTTT
> 
> * Two of the motorway-links there look like residential roads on the
>    device
> * way 4987473 is labeled '67' although there is no such ref or
>    name for this way in the OSM data
> * The way 10864230 (highway=secondary) is labeled "Ramp" on the garmin
> 
> Another area that shows similar problems:
> 
> http://www.openstreetmap.org/?lat=47.479862&lon=8.704816&zoom=18&layers=B000FTF
> 
> Again, motorway link 4248871 is unnamed in OSM, but on the Garmin, it is 
> labeled with the name of a nearby river (Töss, id: 4255496). It also 
> gets rendered like a residential road.
> 
> As a side effect, in those two areas, the garmin omits  some 
> turn-instructions (e.g. to take the ramp to the motorway).
> 
> I also noticed that when taking a different route as the one suggested 
> by the device, it takes much longer for the garmin to recalculate the 
> route than with the built-in map.
> 
> Are these known deficiencies?

I don't recognise them as such.

Are you converting to mp format or processing the osm file(s) directly?

If the latter, are you using the default style files?

Cheers,

Mark