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71st meridian west
MERIDIAN
Longitude 71 degrees W
The meridian 71° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Atlantic Ocean, the Caribbean Sea, South America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.
Magnetic Meridian
![The astronomic prime meridian at Greenwich, England. The geodetic prime meridian is actually 102.478 meters east of this point since the adoption of [[WGS84]].](https://commons.wikimedia.org/wiki/Special:FilePath/Prime meridian.jpg?width=200 "The astronomic prime meridian at Greenwich, England. The geodetic prime meridian is actually 102.478 meters east of this point since the adoption of [[WGS84]].")
LINE BETWEEN THE EARTH'S POLES WITH THE SAME LONGITUDE
Lines of longitude; Line of longitude; Magnetic meridian; Meridian in geography; Geographic meridian; Geographical meridian; Circle of longitude; Standard meridian
A line formed on the earth's surface by the intersection therewith of a
plane passing through the magnetic axis. It is a line determined by the
direction of the compass needle. The meridians constantly change in
direction and correspond in a general way to the geographical meridians.
Greenwich meridian
![Shetland Islands]], the most northerly parts of Scotland and the United Kingdom. Shetland lies 1° W of the prime meridian.](https://commons.wikimedia.org/wiki/Special:FilePath/Britannica Figure of the Earth.jpg?width=200 "Shetland Islands]], the most northerly parts of Scotland and the United Kingdom. Shetland lies 1° W of the prime meridian.")
![Royal Observatory]], marking the original Greenwich Prime meridian.](https://commons.wikimedia.org/wiki/Special:FilePath/Greenwich observatory laser.jpg?width=200 "Royal Observatory]], marking the original Greenwich Prime meridian.")
![A [[GPS]] receiver at the marking strip of the Greenwich meridian. The indicated longitude is not exactly zero because the ''geodetic'' zero meridian on a geocentric reference ellipsoid (which is what GPS positioning yields, using the [[IERS Reference Meridian]]) is 102 metres east of this strip.<ref name="RMG what"/>](https://commons.wikimedia.org/wiki/Special:FilePath/Greenwichmer1.jpg?width=200 "A [[GPS]] receiver at the marking strip of the Greenwich meridian. The indicated longitude is not exactly zero because the ''geodetic'' zero meridian on a geocentric reference ellipsoid (which is what GPS positioning yields, using the [[IERS Reference Meridian]]) is 102 metres east of this strip.<ref name=\"RMG what\"/>")
THE MERIDIAN OF THE BRITISH ROYAL OBSERVATORY IN GREENWICH, ENGLAND, WHEN DISTINGUISHED FROM THE GENERAL CONCEPT OF A PRIME MERIDIAN
Greenwich Meridian Line; Greenwich Meridian; Greenwich meridian; Prime Meridian (Greenwich); Greenwich Prime Meridian; Nullmeridian; Airy meridian
¦ noun the meridian of zero longitude, passing through Greenwich.
