Meridians Of Longitudes

Areas 0° to 180° west of Greenwich (covering the Americas and the Atlantic). Longitude and the Mystery of Time

Meridians of Longitude: Geometrical Foundations and Their Role in Global Spatial Referencing meridians of longitudes

While we no longer rely on mechanical sea clocks, meridians are hardcoded into our modern lives: Areas 0° to 180° west of Greenwich (covering

A meridian of longitude is a semicircle on the Earth’s surface that runs from the North Pole to the South Pole. Any location’s longitude is the angle, measured at the Earth’s center, between the plane of the prime meridian (0°) and the plane of the local meridian passing through that point. The term comes from the Latin meridies , meaning "midday

The term comes from the Latin meridies , meaning "midday." Historically, this is because the Sun crosses a specific meridian (reaches its highest point in the sky) at the same local time for all locations along that line.