[Tagging] Let's get (quite) rid of units and their multiples in OSM values

[Javier Sánchez Portero]

To avoid problems when querying, in case of explicitly add units, I would
prefer to use a separate tag like maxspeed:units=mph, for example.

Javier

El sáb., 28 jul. 2018 10:30, Mark Wagner <mark+osm at carnildo.com> escribió:

> On Fri, 27 Jul 2018 22:33:10 +0200
> François Lacombe <fl.infosreseaux at gmail.com> wrote:
>
> > Well okay
> > Given problem is how can we query maxspeed like :
> > [Maxspeed>25] ?
> >
>
> Which situation do we want to optimize for?  The rare case, or the
> common case?
>
> It's common to want to document legal restrictions such as "speed limit
> 25 miles per hour", "no trucks over 2.5 meters tall", or "maximum
> weight 3500 kilograms".  It's rare to want to query ranges of speeds,
> heights, or weights, particularly without regard to the units in use in
> a given country.
>
> We should make it easy for people to enter and interpret these legal
> restrictions, and if it means query software gets a bit more
> complicated, so be it.  For every person who wants to find roads
> worldwide with speed limits greater than 25 km/h, there are probably
> a thousand who don't want to deal with making sure the rounding is
> correct when displaying US speed limits in miles per hour.
>
> --
> Mark
>
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