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Latitudes and Longitudes : Standard Time, zone, meridians and G.M.T.



Latitudes and Longitudes : Standard Time, zone, meridians and Greenwich Mean Time (G.M.T.)

Latitude is the angular distance of a point on the earth’s surface, measured in degrees from the center of the earth. the earth is slightly flattened at the poles, the linear distance of a degree of latitude at the pole is a little longer than that at the equator. at the equator (0°) it is 68.704 miles, at 45° it is 69.054 miles and at the poles it is 69.407 miles. The average is taken as 69 miles or 111km.

1 mile = 1.607 km.

Longitude is an angular distance, measured in degrees along the equator east or west of the Prime  Meridian. This is the Prime Meridian (0°) from which all other meridians radiate eastwards and westwards up to 180°.

The time of a country that is established by law or general usage as civil time specifically. the mean time of a meridian that is a multiple of 15 arbitrarily applied to a local area or to one of the 24 time zones and designated as a number of hours earlier or later than Greenwich Mean Time (G.M.T.).


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