[OSM-talk] difference between waterway=canal and waterway=drain

[Raphael Studer]

> Both are created by man. A canal is normally navigable and a drain is not. A
> canal is for carrying goods and people, a drain is for transporting water
> much like a river but the drain has been dug by man rather than nature.
> Drains can be anything from quite narrow watercourses to very large
> constructions depending on how much water they carry.

So first criteria would be: a man made waterway,
secondary: navigable (so it would be a question of size of canal
and/or bridges).

If thats correct, I'd like if someone with a good english could add
this hint on the Map_Features page.

Regards,
Raphael