[Tagging] Default maxspeed unit on waterways

Ilpo Järvinen ilpo.jarvinen at helsinki.fi
Wed Oct 29 14:12:04 UTC 2014

On Wed, 29 Oct 2014, Pieren wrote:

> On Wed, Oct 29, 2014 at 2:52 PM, Tom Pfeifer <t.pfeifer at computer.org> wrote:
> > km/h is derived, at least with an integer multiple of seconds,
> > from SI units. mph and knots are not. I would prefer to keep
> > one default unit per tag, consistently, everything else leads
> > to confusion.
> What is leading to confusion is to suggest that km/h is the default
> unit for waterway speed when  knot is in use everywhere. Please think
> as a contributor, not as QA programmer or data consumer (it's easy to
> check if the speed limit belongs to a waterway or not).
> And "The knot is a non-SI unit that is "accepted for use with the SI"
> (https://en.wikipedia.org/wiki/Knot_%28unit%29)

I don't know about other countries, but here in Finland the water maxspeed 
signage is in km/h although knot is used for almost everything else.


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