[OSM-talk] [tagging] Feature Proposal - RFC - waterways/ditch

[cobaco]

On Tuesday 2008-09-02, Richard Fairhurst wrote:
> cobaco wrote:
> > hm, does that statue specify which mile they're talking about? If it
> > doesn't, can one interpret it as one of the longer miles (see the
> > wikipedia page, theres about a dozen different definitions of mile,
> > ranging from 1.? km to 11.? km)
>
> And don't forget that the metre was redefined in 1983. If specifying a
> speed in km/h, you should ascertain the age of the sign to see whether
> it's 50,000 * one ten-millionth of the distance from the Equator to
> the North Pole via Paris, or the distance travelled by light in an
> absolute vacuum in 50,000 299,792,458ths of a second.

LOL, true, but the actual differences are on a scale measurable by 
ordinarily used instruments is nil (doubly so in OSM). So from a practical 
perspective it doesn't matter.

The differences in interpretation for a mile are rather more dramatic though 
(hm, me wonders if any croation/russion/swedisch/norwegian tourists have 
ever tried to get out of speeding tickets that way :)
-- 
Cheers, Cobaco (aka Bart Cornelis)
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 197 bytes
Desc: This is a digitally signed message part.
URL: <http://lists.openstreetmap.org/pipermail/talk/attachments/20080902/45360846/attachment.pgp>