On 25/06/2019 20:01, Mateusz Konieczny wrote:
25 Jun 2019, 17:47 by pe...@dobratz.us:
Reading this page, I see the potential ambiguity extends deeper than
I realized (short ton, metric ton, long ton)
https://en.wikipedia.org/wiki/Tonne
AFAIK all cases of "t" in USA on max weight signs means "short ton".
Taggable by adding "st" unit or by converting to pounds, and adding
"lbs" unit.
First seems to be superior as puts lower burden on mappers and it allows
to directly map what is signed.
See https://wiki.openstreetmap.org/wiki/Key:maxweight#Usage
FYI "st" is used in Britain & Ireland to mean a "stone" ( 14 pounds i.e.
6.35029318 kg ). People in UK & Ireland can refer to their weight as "X
stone", or "I've lost half a stone on my diet" (but kg is common too).
If you use "st" in an OSM tag value for weight, a not very bright data
consumer might interpret that as stone. Maybe we can side-step that
problem by picking a better suffix?
What about "uston" (maxweight=8 uston)?
Are there other regions which use “ton/tonne/...” on signs which
*aren't* the US ton? If so, we could just say “t” means “us short ton”.
“Gallons” is also different in US units & imperial units, so "usgal" or
"impgal" are better choices than "gal". (Relevant when mapping fire
hydrant flow rates).
https://en.wikipedia.org/wiki/Stone_(unit)
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