[Tagging] bridge=aqueduct mapped as polygon riverbank?

[yvecai]

> Besides riverbanks are tagged as "waterway=riverbanks" which will lead 
> to problems when one day routing on waterways will be possible. 
> Therefore I and others have switched to mapping rivers as water with 
> "natural=water" and not use riverbanks anymore.
>
> Wyo
In any case, for routing it is better to keep a way waterway=canal in 
the middle, no?
Yves