Talk:International System of Units/Archives/02/2016

Conflicting meridian definitions
The base units table suggests that a meridian is 10 million meters long, a quarter of the Earth's circumference. Yet the linked wiki page about meridians says a meridian is 20 million meters long, half the Earth's circumference. Which is it? — Preceding unsigned comment added by TharosTheDragon (talk • contribs) 04:55, 18 February 2016 (UTC)


 * The table says that the original concept was that the meter was 1/10,000,000 of the length of the meridian through Paris from the north pole to the equator. The generally accepted definition of a meridian is an arc along the earth's surface from the north pole to the south pole. So I suppose the table should say the meter is based on the portion of the meridian through Paris from the north pole to the equator. Jc3s5h (talk) 07:05, 18 February 2016 (UTC)