[Tagging] Rivers intermittently navigable

[Kevin Kenny]

On Fri, Feb 15, 2019 at 1:35 PM Richard Fairhurst <richard at systemed.net> wrote:
> motorboat= is an access tag, so it represents whether a use class is
> permitted on that way, not whether it's possible.
>
> I'd think a variant on depth= would be most appropriate. Something like
> depth:summer=0.5-3.0 might indicate that the river depth in summer can
> typically vary between 0.5m (i.e. only a canoe at a pinch) and 3m. Defining
> "typically" is left as an exercise to the reader. :)

For the river that I have in mind, a conditional access tag would be
good enough.
I don't think motor navigation is permitted until the locks are
operational in the spring. This time of year, navigation is also not
possible because the river is usually frozen over, but I think that
lies in the intersection of 'impossible AND unlawful.'