[mkgmap-dev] basemap routing is used instead of the mkgmap derived map

Sat Jun 25 02:30:18 BST 2011

Dear Marko,

I don't think it is "way island problem".  I've seen this behaviour on
several areas but the data is OK.

On 6/17/11, Marko Mäkelä <marko.makela at iki.fi> wrote:
> On Fri, Jun 17, 2011 at 06:59:09PM +0800, maning sambale wrote:
>>Can anyone confirm this bug? https://github.com/maning/osmphgps/issues/20
>
> I reported this several months ago. In my case, the problem was a
> "routing island". The destination way was not connected to the rest of
> the road network. (It was on a highway=pedestrian area; I fixed it by
> adding a way through the area.)
>
> If I renamed the gmapbmap.img so that Garmin would be unable to find it,
> then it would say "routing error". The destination point happened to be
> on a way in the Garmin basemap, that is apparently why it chose the
> basemap. If I routed to the next POI (some 20 meters apart), it would
> route just fine, using a way that was connected to the edge of the
> pedestrian area.
>
> I guess that Garmin picks the nearest way to the destination POI and
> computes the route backwards from that. If the nearest way is a "routing
> island", it will not work.
>
> Does http://keepright.ipax.at cover the area? Does it report any
> "routing islands" near the start or destination?
>
> Best regards,
>
> 	Marko
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>

-- 
cheers,
maning
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