Meridian Longitude 〈INSTANT〉
 
 
 
 

Meridian Longitude 〈INSTANT〉

Meridian Longitude refers to two distinct concepts: it is the primary geographic reference line for the Earth's coordinate system

Key Takeaways

  • Meridian longitude lines run pole-to-pole, measuring east-west position.
  • The Prime Meridian at Greenwich (0°) is the international standard.
  • Longitude is fundamentally linked to time (15° per hour).
  • One degree of longitude varies in distance from 111 km (equator) to 0 km (poles).
  • Modern GPS relies on precise longitude calculations using atomic time.

Universal Day: The conference established that the day begins at mean midnight on the Prime Meridian. meridian longitude

Definition: Meridians (or lines of longitude) are imaginary semicircles running north-to-south, connecting the North Pole to the South Pole. Meridian Longitude refers to two distinct concepts: it

  1. Determining Time Zones: Meridian longitude helps establish time zones, with each zone separated by 15° of longitude.
  2. GPS Technology: Global Positioning System (GPS) relies on meridian longitude to provide accurate location information.
  3. Maritime Navigation: Ships use meridian longitude to chart their courses and avoid collisions.

Since the dawn of civilization, humanity has possessed an innate desire to understand its place in the physical world. While the concept of latitude—measuring distance north or south of the equator—was relatively easy to conceptualize based on the angle of the sun, the challenge of measuring east-west positioning puzzled scholars and sailors for millennia. The solution to this puzzle lies in the concept of meridians and the system of longitude. These imaginary lines do not merely map the Earth; they underpin global navigation, define our concept of time, and illustrate the intricate relationship between astronomy and geography. Universal Day: The conference established that the day