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+...@carnildo.com> escribió: > On Fri, 27 Jul 2018 22:33:10 +0200 > François Lacombe <fl.infosrese...@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 > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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