Googling for latitude and longitude, I find 51° 02'N, 002° 20'E and 41°N 24N, 002° 09'E. However, that depends on exactly what is taken as the centers of these locations.
Using a Vincenty equation calculator for the "great ellipsoid" solution, the distance as the crow flies (just above the surface of the ellipsoid), the distance is 1070.890 km. http://www.movable-type.co.uk/scripts/latlong-vincenty.html That is indeed roughly 1/40 the circumference or 1/10 the polar quadrant, with no great accuracy. Using Vincenty's equation for the polar quadrant, it is 10 001 965.729 m for the WGS-84 ellipsoid. ________________________________ From: Pat Naughtin <[email protected]> To: U.S. Metric Association <[email protected]> Sent: Tue, October 19, 2010 5:14:40 PM Subject: [USMA:48682] Re: The metre we use Dunkirk to Barcelona is about 1/40, not 1/10, of the earth's circumference. Could I see your calculation, please. The road distance from Barcelona to Dunkerque is 1329 kilometres, and I worked from there. See http://maps.google.ca/maps/ms?ie=UTF8&om=1&oe=UTF8&msa=0&msid=102676733516280739492.000001124006a1f2543c7
