Meridiaane
Meridiaane are imaginary lines that traverse the globe from the North Pole to the South Pole. In geography, they define longitude and form part of the coordinate grid used for navigation, mapmaking, and timekeeping. The Prime Meridian, designated at 0 degrees longitude, passes through Greenwich and serves as a reference point for measuring east and west. Meridians are angular, with one degree of longitude representing a smaller ground distance toward the poles than at the equator.
Geographically, meridians work together with parallels (lines of latitude) to create a graticule, a network that
In traditional East Asian medicine, the term meridians also refers to energy channels believed to conduct qi,
Historically, the concept of meridians in geography emerged from the needs of navigation and cartography, while
See also: longitude, prime meridian, time zones, acupuncture, qi.