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

[leblatt]

I was taught a metre was a 40 millionth of the equator at the temperature of
4 celcius degrees.

> -----Message d'origine-----
> De : talk-bounces at openstreetmap.org [mailto:talk-
> bounces at openstreetmap.org] De la part de Richard Fairhurst
> Envoyé : mardi 2 septembre 2008 20:17
> À : talk at openstreetmap.org
> Objet : Re: [OSM-talk] [tagging] Feature Proposal - RFC -
> waterways/ditch
> 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.
> 
> /me starts to cry.
> 
> cheers
> Richard
> 
> 
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