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Prime meridian

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  • 1. PRIME MERIDIAM OF THE WORLD
  • 2. What is the Meridian Line?
    • The Meridian Line is an imaginary line which runs from the North Pole to the South Pole .
  • 3.
    • For many years, different countries measured longitude from different meridians. The French and Algerians, for example, used the Paris Meridian; the Spanish measured from one that passed through Isla del Hierro . By the 1880s, many people could see the advantages of measuring from a single meridian.
  • 4.
    • The imaginary line that separates East and West is the Prime Meridian. The Prime Meridian passes through Greenwich, England.
  • 5.
    • By international convention it runs through "the primary transit" instrument (main telescope) at the Royal Observatory in Greenwich.
  • 6. Why does the Prime Meridian (Zero Longitude) pass through Greenwich?
    • The International Meridian Conference took place in October 1884 in Washington DC. Twenty-five nations were represented at the conference by 41 delegates. The Greenwich Meridian was chosen to become the Prime Meridian of the World. There were several reasons for this; the main one being that nearly two thirds of the World's ships were already using charts based on it.
  • 7. How long is the Prime Meridian?
    • From Pole to Pole, the Prime Meridian covers a distance of 20,000 km.
  • 8. Which countries does the Prime Meridian pass through?
    • In the Northern Hemisphere, the Prime Meridian passes through the UK, France and Spain in Europe and Algeria, Mali, Burkina, Faso, Tongo and Ghana in Africa.
    • The only landmass crossed by the Meridian in the Southern Hemisphere is Antarctica.
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  • 10. Who Am I? I'm the Prime Meridian!
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