uses of meridians of longitude
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rime meridian
Latitude and Longitude (Meridians and Parallels) The Equator is an imaginary circle equidistant from the poles of the Earth. Circles parallel to the Equator (lines running east and west) are parallels of latitude. They are used to measure degrees of latitude north or south of the Equator.
Longitude is a measure of how far east or west you are on the globe, using the Prime Meridian as the center (0º longitude). It is used together with Latitude (which measures north and south, using the Equator as the center) to pinpoint coordinates on the globe.
A (geographic) meridian (or line of longitude) is the half of an imaginary great circle on the Earth's surface, terminated by the North Pole and the South Pole, connecting points of equal longitude, as measured in angular degrees east or west of the Prime Meridian.
What are the uses of latitudes and longitudes?
Originally Answered: What is the function of latitude and longitude?
The function of latitude and longitude is to accurately locate a position on the surface of the earth. Latitudes are circles around the earth that are parallel to the equator. Longitudes are circles around the earth that intersect at the north and south poles. Longitude is measured in degrees east or west with zero (or 360 - remember it’s a circle) degrees longitude positioned at the Prime Meridian in Greenwich, England. Latitude is measured in degrees north or south of the equator at zero degrees, making the poles 90 degrees from the equator. The latitude and longitude coordinates form a grid on the earth’s surface that can be used to determine the location of any point on the by the combination of the two values, as in x, y coordinates on horizontal and vertical axes. The idea is more easily understood graphically:
A great book about the development of navigation based on latitude and longitude is: Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time.