WHICH INTERSECTING LINES HELP US IN CALCULATING TIME
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longitudinal lines help in calculation
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Longitudes are geographical positioning markers that run from the geographical North to the geographical South Pole, intersecting the Equator. They meet at both Poles, and specify the East-West position of a location.
Longitudes are therefore imaginary circles that intersect the North and South Poles, and the Equator. Half of a longitudinal circle is known as a Meridian. Meridians are perpendicular to every latitude.
Unlike, latitudes, there is no obvious central longitude. However, in order to measure the position of a location based on the longitude, cartographers and geographers over the course of history have designated different locations as the main longitudinal reference point. Today, the meridian line through Greenwich, England is considered as the reference point for longitudes. This line is also known as the Prime Meridian
The Prime Meridian is set as 0° longitude and it divides the Earth into the Eastern and the Western Hemisphere. All the other longitudes are measured, and named after the angle they make with respect to the center of the Earth from the intersection of the Meridian and the equator.
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