Hi Gerd,
yes, I expect a routing node at junction form "through_route". This node
could be placed in the middle of a longer road. In this case I suggest
to consider splitting road at junction/routing node.
My understanding is, that road in img can contain multiple segments
separated by nodes. Alternatively the same geographic object can be
represented by multiple roads connected at nodes. Former case gives
faster route calculation, later can give more messages when navigating.
--
Best regards,
Andrzej
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