Meridian Longitude !full! (2024-2026)

In 1884, the International Meridian Conference convened in Washington, D.C., to standardize time and navigation. They established the Prime Meridian (0° longitude) at the Royal Observatory in Greenwich, London. This decision was pragmatic; at the time, over two-thirds of the world's shipping already used Greenwich charts.

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For centuries, different nations used their own "starting" meridians, often centered on their capital cities. This created chaos for international shipping and mapping. In 1884, the in Washington, D.C., established the Greenwich Meridian (passing through the Royal Observatory in London) as the official Prime Meridian (0° longitude). In 1884, the International Meridian Conference convened in