what is noon meridian and how they made latitudes and longitudes
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Cartographers and geographers trace horizontal and vertical lines called latitudes and longitudes across Earth's surface to locate points on the globe.

Longitudes and latitudes.
Longitudes and latitudes form Earth's geographical coordinates.
Together, they form the Earth’s geographical coordinates, and represent the angular distance of any location from the center of the Earth. Both latitudes and longitudes are measured in degrees (°) and minutes (′).
Astronomical terms & definitions
Dividing Earth Into Hemispheres
The Earth is, almost, but not quite, a sphere that rotates around its axis. Scientists call this shape a spheroid or ellipsoid. If we draw a line passing through the center of the Earth along its rotational axis, the line would pass through the North and the South Pole.
The Equator is an imaginary line perpendicular to this axis. It is equidistant from the North and South Poles, and divides the globe into the Northern Hemisphere and the Southern Hemisphere.
Most locations on the Equator experience consistently high temperatures throughout the year. They also experience at least 12 hours of daylight every day during the year. On the Equinoxes – September and March – the sun is directly overhead the Equator, resulting in almost exactly 12 hour days and 12 hour nights.
The Equator passes through 14 countries, including Uganda, Kenya, Somalia, Indonesia, Ecuador, Colombia, and Brazil.

Longitudes and latitudes.
Longitudes and latitudes form Earth's geographical coordinates.
Together, they form the Earth’s geographical coordinates, and represent the angular distance of any location from the center of the Earth. Both latitudes and longitudes are measured in degrees (°) and minutes (′).
Astronomical terms & definitions
Dividing Earth Into Hemispheres
The Earth is, almost, but not quite, a sphere that rotates around its axis. Scientists call this shape a spheroid or ellipsoid. If we draw a line passing through the center of the Earth along its rotational axis, the line would pass through the North and the South Pole.
The Equator is an imaginary line perpendicular to this axis. It is equidistant from the North and South Poles, and divides the globe into the Northern Hemisphere and the Southern Hemisphere.
Most locations on the Equator experience consistently high temperatures throughout the year. They also experience at least 12 hours of daylight every day during the year. On the Equinoxes – September and March – the sun is directly overhead the Equator, resulting in almost exactly 12 hour days and 12 hour nights.
The Equator passes through 14 countries, including Uganda, Kenya, Somalia, Indonesia, Ecuador, Colombia, and Brazil.
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Answer:
Time the difference between local noon, measured from the sun, and the 12 o'clock noon pips on the radio. If you reach local noon before the radio signal, you're east of the Prime Meridian (0º longitude). If the radio signals noon while the sun is still climbing, you're on a western longitude.
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