This message did not get thru the server. So I resend without hyperlinks.
The rules for tracing rivers when we encounter island are not clear to me.
It seems from documentation of the tag waterway=riverbank (wiki tag:waterway))
that there should be only one way, and that a relation should take care of this
situation.
Also, we can merge ways only when both nodes are end points.
But I see rivers where two ways have been traced around islands,
For Example, Les Trois Rivières, way=49375347 have few segments around islands
wich are not merged. Should these segments be considered as duplicates.
Otherwise, how should they be treated.
Pierre Beland
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