A meridian (or line of longitude) is the half of an imaginary great circle on the Earth's surface terminated by the North Pole and the South Pole, connecting points of equal longitude. The position of a point along the meridian is given by its latitude. Each meridian is perpendicular to all circles of latitude. Each is also the same size, being half of a great circle on the Earth's surface and therefore measuring 20,003.93 km (12,429.9 miles).
Other articles related to "meridian":
... The magnetic meridianis an equivalent imaginary line connecting the magnetic south and north poles and can be taken as the magnetic force lines along the surface of the earth ... a compass needle will be parallel to the magnetic meridian ... The angle between the magnetic and the true meridianis the magnetic declination, which is relevant for navigating with a compass ...
Famous quotes containing the word meridian:
Hale dead and deathless do the women of the hill
Love for ever meridian through the courters trees
And the daughters of darkness flame like Fawkes fires still.”
—Dylan Thomas (19141953)