[OSM-newbies] Road Maximum speed in UK units
swanilli at gmail.com
Thu May 7 14:15:00 BST 2009
Actually, although hour is not directly an SI unit, it is recognised
in the relevant International Standard (ISO 1000) which says, "There
are certain units, outside the SI, recognized by the CIPM as having to
be retained because of their practical importance" (clause 7.1). (CIPM
is the International Committee on Weights and Measures.)
Among the non-SI units CIPM recognises are hour, day, degree (angle) and litre.
If you want to avoid confusion kilometres per hour should be written
consistently as km/h. Other abbreviations such as kph, kmh, k.p.h.
don't make sense.
I will crawl back into my hole now.
2009/5/7 Thomas König <post at tikey.de>:
> 1) Only for clarification: hour is NOT an SI-unit. So when measuring in
> km/h we can't complain about the ridiculous unit system in the US/UK.
> 2) I think it shouldn't be too hard for a computer to convert units!
> (Regardless of the fact if someone uses kph, kmh, k.p.h. or whatever
> abreviation.) Isn't that what computers are made for - calculations?
> Regarding the loss of accuracy: As speed limits are always integers (and
> I guess all over the world they should be divisible by 5) the computer
> (renderer) should be able to perform the conversion without loss of
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