Longitude is the measurement east or west the the prime meridian. Longitude is measured by imagine lines that run approximately the earth vertically (up and down) and also meet at the North and South Poles. This lines are well-known as meridians. Each meridian steps one arcdegree that longitude. The distance roughly the planet measures 360 degrees.The meridian the runs with Greenwich, England, is internationally welcomed as the line 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 the the world, the eastern Hemisphere, is measure up in levels east of the prime meridian. The various other half, the west Hemisphere, in levels west the the prime meridian.Degrees the longitude are split into 60 minutes. Each minute that longitude have the right to be further divided into 60 seconds. Because that example, the longitude that Paris, France, is 2° 29" E (2 degrees, 29 minutes east). The longitude because that Brasilia, Brazil, is 47° 55" W (47 degrees, 55 minutes west).A level of longitude is about 111 kilometers (69 miles) at its widest. The widest locations of longitude are near the Equator, wherein the earth bulges out. Due to the fact that of the Earth"s curvature, the actual street of a degrees, minutes, and seconds that longitude counts on its street from the Equator. The better the distance, the much shorter the length between meridians. Every meridians satisfy at the North and South Poles.Longitude is related to latitude, the measure of street north or southern of the Equator. Currently of latitude are referred to as parallels. Maps room often significant with parallels and also meridians, developing a grid. The suggest in the grid where parallels and meridians intersect is referred to as a coordinate. Works with can be supplied to locate any suggest on Earth.Knowing the exact coordinates of a website (degrees, minutes, and also seconds of longitude and also latitude) is an important for military, engineering, and rescue operations. Collaborates can provide military leaders the location of tools or adversary troops. Coordinates help engineers arrangement the best spot because that a building, bridge, well, or various other structure. Coordinates assist airplane pilots land planes or drop aid packages in specific locations.

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Into the good Wide OpenIt was not until the 18th century that world were able come correctly identify their longitude, also though they had been maybe to number out latitude for some time.

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Not being able come reckon longitude to be dangerous because that sailors. Without precise location, they can easily operation out that food or water ~ above a long expedition into uncharted territory.