On Sun, Oct 23, 2022 at 08:36:51PM -0500, Jonathan A. Kollasch wrote:
> > (c) units.lib should get some editorial attention. Does anyone know
> > what "british" is supposed to be there for?
>
> It looks like it's a common definition of the US "survey foot".
>
> https://www.nist.gov/pml/us-surveyfoot has some background on the
> unit. It's been deemed obsolete since January 1, 2022. I'm not sure
> why units.lib calls the ratio "british" though.
>
> TLDR: the "(US) survey foot" is 1200/3937 SI meters, and the
> "(international) foot" is
> 0.3048 SI meters, a ratio of about 1.000002000004000:1 or 1:0.999998.
Seems like the right thing to do is
-surveyfoot british-ft
+surveyfoot 1200|3937 meter
-geodeticfoot british-ft
+geodeticfoot surveyfoot
and kill off "british", unless anyone can think of a reason to keep
this name for almost-but-not-quite-1.
Note that we have
inch 2.54 cm
which is exactly equivalent to 0.3048 meters per foot.
--
David A. Holland
dholl...@netbsd.org
