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To solve this global headache, 41 delegates from 25 nations met in Washington, D.C., in October 1884. They voted overwhelmingly to adopt the meridian passing through the , as the official Prime Meridian (0° Longitude). Greenwich was chosen primarily for two practical reasons: meridian longitude
The is the foundational line of the entire longitude system. Designated as 0° longitude, it is the reference from which all other meridians are measured east or west up to 180°. This public link is valid for 7 days