Longitude is the measurement eastern or west the the prime meridian. Longitude is measure up by imaginary lines that run approximately the earth vertically (up and also down) and meet at the North and South Poles. This lines are known as meridians. Every meridian procedures one arcdegree that longitude. The distance about the planet measures 360 degrees.The meridian that runs through Greenwich, England, is internationally welcomed as the heat of 0 degrees longitude, or prime meridian. The antimeridian is halfway approximately the world, at 180 degrees. That is the basis for the International date Line.Half that the world, the eastern Hemisphere, is measure in levels east of the prime meridian. The various other half, the western Hemisphere, in levels west the the element meridian.Degrees the longitude are split into 60 minutes. Every minute the longitude can be further divided into 60 seconds. For example, the longitude of Paris, France, is 2° 29" E (2 degrees, 29 minute east). The longitude for Brasilia, Brazil, is 47° 55" W (47 degrees, 55 minute west).A degree of longitude is around 111 kilometers (69 miles) at its widest. The widest areas of longitude are near the Equator, whereby the planet bulges out. Since of the Earth"s curvature, the actual distance of a degrees, minutes, and also seconds that longitude depends on its street from the Equator. The greater the distance, the shorter the length between meridians. All meridians fulfill at the North and also South Poles.Longitude is concerned latitude, the measurement of street north or southern of the Equator. Present of latitude are called parallels. Maps are often significant with parallels and also meridians, creating a grid. The suggest in the grid where parallels and also meridians crossing is called a coordinate. Coordinates can be provided to locate any point on Earth.Knowing the exact coordinates of a website (degrees, minutes, and seconds of longitude and also latitude) is an useful for military, engineering, and rescue operations. Works with can give military leader the place of tools or foe troops. Coordinates assist engineers plan the best spot for a building, bridge, well, or various other structure. Coordinates aid airplane pilots soil planes or drop assist packages in specific locations.

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Into the great Wide OpenIt to be not until the 18th century that world were able to correctly identify their longitude, also though they had been may be to number out latitude for part time.

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No being able come reckon longitude was dangerous for sailors. Without specific location, they can easily run out the food or water ~ above a long expedition into uncharted territory.