[mkgmap-dev] Routing issue at staring oneway road

Thu Apr 7 17:06:09 BST 2011

In this situation my Garmin Dakota 20 is routing me up the oneway part
>> several roads around the block to get to the target just down the
>> street.
> Could it be that we are incorrectly merging the oneway street with the
> non-oneway street, making the non-oneway section oneway? What are the
> criteria for merging ways? I think that the merging should be blocked if
> any of the routing attributes differ: oneway, toll, mkgmap:unpaved,
> access/motorcar/bicycle/foot, etc.
>
> In http://www.openstreetmap.org/browse/node/101581030 the node is not
> part of a turn restriction relation. If it were, that would be a further
> reason not to merge the ways, I guess.
>
>
Yes, that would be a possible explanation. But as far as I remember, 
merging takes place only for the graphical representation of lines in 
the different levels. The routing graph should be not affected by this.

@Markus:
Are there any signs, that the destination road is a oneway?

Regards,
Johann