Meridian Longitude Here

: The distance between meridians is greatest at the equator (roughly 111 km per degree) and decreases to zero at the poles. Great Circles

Meridians (or lines of longitude) are imaginary semicircles running north-to-south, connecting the North Pole to the South Pole. meridian longitude

Before Greenwich, every country used its own prime meridian (Paris, Rome, even Washington D.C.). That made global navigation chaos. At the 1884 International Meridian Conference, 25 nations voted for Greenwich as the global standard—partly because of Britain’s maritime dominance and the popularity of Greenwich-based nautical charts. : The distance between meridians is greatest at

If you need this expanded into a longer formal report, with figures, maps, references, or a specific focus (e.g., navigation history, GNSS technical details, or mathematical derivations), tell me which focus and desired length. That made global navigation chaos

: In 1884, the International Meridian Conference held in Washington, D.C., officially selected the meridian passing through the Royal Observatory in Greenwich, London , as the global standard. Hemispheres : Together with its opposite, the 180∘180 raised to the composed with power