% is the value shown on signs, the highest I can remember seeing is 25%, will be on the lookout now. There may still be some older 1:4 (1 in 4) type signs around so maybe a unit is useful.
Phil (trigpoint) -- Sent from my Nokia N9 On 12/08/2013 22:13 André Pirard wrote: On 2013-08-12 20:43, Mike Thompson wrote : My apologies if it was my post that got this off track. I think the original point was, if "%" is the default "unit", should we actually be putting the "%" in the tag? My view is that it is not required, but putting it in causes little harm. While trying hard to be non technical, % is not a unit (dimension) but a multiplier. In km, m is the unit (meter) and k is the multiplier (1000). In "%" there is no unit and the multiplier is .01. My snippy comment means that many people seeing "10" would ask "10 what?". A dimensionless value is disturbing and that's why people like to keep something with %. So, why remove what doesn't hurt indeed, is self-describing and that everybody understands? It ain't broke ! ;-) For technical people, a 10% slope is .10 and a school mark is between 0 and 1. But I see that several of us are writing the same thing at the same time ;-) I just found a more interesting subject ;-) Cheers, André. Mike On Mon, Aug 12, 2013 at 11:37 AM, Ronnie Soak <[email protected]> wrote: 2013/8/12 André Pirard <[email protected]> Imagine seeing on a shop poster "10 OFF" or "0.1 OFF" and you've got the answer to THAT point. Can I extract from your snippy comment, that in your opinion we should omit the % sign because one can clearly distinguish between a pure ratio and a percent-scaled ratio? What about the distinction between the percent-value and a value in degrees? Regards, Chaos _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging
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