View source for Lines of Longitude (East)

[[File:Earth-Coordinates-Map-1920.jpg|thumb|Earth Coordinates Map]]Longitude is a geographic coordinate that specifies the east-west position of a point on the Earth's surface. It is an angular measurement, usually expressed in degrees and denoted by the Greek letter lambda (λ). Points with the same longitude lie in lines running from the North Pole to the South Pole. By convention, one of these, the Prime Meridian, which passes through the Royal Observatory, Greenwich, England, was intended to establish the position of zero degrees longitude. The longitude of other places was to be measured as the angle east or west from the Prime Meridian, ranging from 0° at the Prime Meridian to +180° eastward and −180° westward. Specifically, it is the angle between a plane containing the Prime Meridian and a plane containing the North Pole, South Pole and the location in question. (This forms a right-handed coordinate system with the z axis (right hand thumb) pointing from the Earth's center toward the North Pole and the x axis (right hand index finger) extending from Earth's center through the equator at the Prime Meridian.)A location's north-south position along a meridian is given by its latitude, which is (not quite exactly) the angle between the local vertical and the plane of the Equator.

[http://en.wikipedia.org/wiki/Longitude Longitude, Wikipedia]

==East Lines==
# [http://en.wikipedia.org/wiki/1st_meridian_east 1st meridian east]
# [http://en.wikipedia.org/wiki/2nd_meridian_east 2nd meridian east]
# [http://en.wikipedia.org/wiki/3rd_meridian_east 3rd meridian east]
# [http://en.wikipedia.org/wiki/4th_meridian_east 4th meridian east]
# [http://en.wikipedia.org/wiki/5th_meridian_east 5th meridian east]
# [http://en.wikipedia.org/wiki/6th_meridian_east 6th meridian east]
# [http://en.wikipedia.org/wiki/7th_meridian_east 7th meridian east]
# [http://en.wikipedia.org/wiki/8th_meridian_east 8th meridian east]
# [http://en.wikipedia.org/wiki/9th_meridian_east 9th meridian east]
# [http://en.wikipedia.org/wiki/10th_meridian_east 10th meridian east]
# [http://en.wikipedia.org/wiki/11th_meridian_east 11th meridian east]
# [http://en.wikipedia.org/wiki/12th_meridian_east 12th meridian east]
# [http://en.wikipedia.org/wiki/13th_meridian_east 13th meridian east]
# [http://en.wikipedia.org/wiki/14th_meridian_east 14th meridian east]
# [http://en.wikipedia.org/wiki/15th_meridian_east 15th meridian east]
# [http://en.wikipedia.org/wiki/16th_meridian_east 16th meridian east]
# [http://en.wikipedia.org/wiki/17th_meridian_east 17th meridian east]
# [http://en.wikipedia.org/wiki/18th_meridian_east 18th meridian east]
# [http://en.wikipedia.org/wiki/19th_meridian_east 19th meridian east]
# [http://en.wikipedia.org/wiki/20th_meridian_east 20th meridian east]
# [http://en.wikipedia.org/wiki/21st_meridian_east 21st meridian east]
# [http://en.wikipedia.org/wiki/22nd_meridian_east 22nd meridian east]
# [http://en.wikipedia.org/wiki/23rd_meridian_east 23rd meridian east]
# [http://en.wikipedia.org/wiki/24th_meridian_east 24th meridian east]
# [http://en.wikipedia.org/wiki/25th_meridian_east 25th meridian east]
# [http://en.wikipedia.org/wiki/26th_meridian_east 26th meridian east]
# [http://en.wikipedia.org/wiki/27th_meridian_east 27th meridian east]
# [http://en.wikipedia.org/wiki/28th_meridian_east 28th meridian east]
# [http://en.wikipedia.org/wiki/29th_meridian_east 29th meridian east]
# [http://en.wikipedia.org/wiki/30th_meridian_east 30th meridian east]
# [http://en.wikipedia.org/wiki/31st_meridian_east 31st meridian east]
# [http://en.wikipedia.org/wiki/32nd_meridian_east 32nd meridian east]
# [http://en.wikipedia.org/wiki/33rd_meridian_east 33rd meridian east]
# [http://en.wikipedia.org/wiki/34th_meridian_east 34th meridian east]
# [http://en.wikipedia.org/wiki/35th_meridian_east 35th meridian east]
# [http://en.wikipedia.org/wiki/36th_meridian_east 36th meridian east]
# [http://en.wikipedia.org/wiki/37th_meridian_east 37th meridian east]
# [http://en.wikipedia.org/wiki/38th_meridian_east 38th meridian east]
# [http://en.wikipedia.org/wiki/39th_meridian_east 39th meridian east]
# [http://en.wikipedia.org/wiki/40th_meridian_east 40th meridian east]
# [http://en.wikipedia.org/wiki/41st_meridian_east 41st meridian east]
# [http://en.wikipedia.org/wiki/42nd_meridian_east 42nd meridian east]
# [http://en.wikipedia.org/wiki/43rd_meridian_east 43rd meridian east]
# [http://en.wikipedia.org/wiki/44th_meridian_east 44th meridian east]
# [http://en.wikipedia.org/wiki/45th_meridian_east 45th meridian east]
# [http://en.wikipedia.org/wiki/46th_meridian_east 46th meridian east]
# [http://en.wikipedia.org/wiki/47th_meridian_east 47th meridian east]
# [http://en.wikipedia.org/wiki/48th_meridian_east 48th meridian east]
# [http://en.wikipedia.org/wiki/49th_meridian_east 49th meridian east]
# [http://en.wikipedia.org/wiki/50th_meridian_east 50th meridian east]
# [http://en.wikipedia.org/wiki/51st_meridian_east 51st meridian east]
# [http://en.wikipedia.org/wiki/52nd_meridian_east 52nd meridian east]
# [http://en.wikipedia.org/wiki/53rd_meridian_east 53rd meridian east]
# [http://en.wikipedia.org/wiki/54th_meridian_east 54th meridian east]
# [http://en.wikipedia.org/wiki/55th_meridian_east 55th meridian east]
# [http://en.wikipedia.org/wiki/56th_meridian_east 56th meridian east]
# [http://en.wikipedia.org/wiki/57th_meridian_east 57th meridian east]
# [http://en.wikipedia.org/wiki/58th_meridian_east 58th meridian east]
# [http://en.wikipedia.org/wiki/59th_meridian_east 59th meridian east]
# [http://en.wikipedia.org/wiki/60th_meridian_east 60th meridian east]
# [http://en.wikipedia.org/wiki/61st_meridian_east 61st meridian east]
# [http://en.wikipedia.org/wiki/62nd_meridian_east 62nd meridian east]
# [http://en.wikipedia.org/wiki/63rd_meridian_east 63rd meridian east]
# [http://en.wikipedia.org/wiki/64th_meridian_east 64th meridian east]
# [http://en.wikipedia.org/wiki/65th_meridian_east 65th meridian east]
# [http://en.wikipedia.org/wiki/66th_meridian_east 66th meridian east]
# [http://en.wikipedia.org/wiki/67th_meridian_east 67th meridian east]
# [http://en.wikipedia.org/wiki/68th_meridian_east 68th meridian east]
# [http://en.wikipedia.org/wiki/69th_meridian_east 69th meridian east]
# [http://en.wikipedia.org/wiki/70th_meridian_east 70th meridian east]
# [http://en.wikipedia.org/wiki/71st_meridian_east 71st meridian east]
# [http://en.wikipedia.org/wiki/72nd_meridian_east 72nd meridian east]
# [http://en.wikipedia.org/wiki/73rd_meridian_east 73rd meridian east]
# [http://en.wikipedia.org/wiki/74th_meridian_east 74th meridian east]
# [http://en.wikipedia.org/wiki/75th_meridian_east 75th meridian east]
# [http://en.wikipedia.org/wiki/76th_meridian_east 76th meridian east]
# [http://en.wikipedia.org/wiki/77th_meridian_east 77th meridian east]
# [http://en.wikipedia.org/wiki/78th_meridian_east 78th meridian east]
# [http://en.wikipedia.org/wiki/79th_meridian_east 79th meridian east]
# [http://en.wikipedia.org/wiki/80th_meridian_east 80th meridian east]
# [http://en.wikipedia.org/wiki/81st_meridian_east 81st meridian east]
# [http://en.wikipedia.org/wiki/82nd_meridian_east 82nd meridian east]
# [http://en.wikipedia.org/wiki/83rd_meridian_east 83rd meridian east]
# [http://en.wikipedia.org/wiki/84th_meridian_east 84th meridian east]
# [http://en.wikipedia.org/wiki/85th_meridian_east 85th meridian east]
# [http://en.wikipedia.org/wiki/86th_meridian_east 86th meridian east]
# [http://en.wikipedia.org/wiki/87th_meridian_east 87th meridian east]
# [http://en.wikipedia.org/wiki/88th_meridian_east 88th meridian east]
# [http://en.wikipedia.org/wiki/89th_meridian_east 89th meridian east]
# [http://en.wikipedia.org/wiki/90th_meridian_east 90th meridian east]
# [http://en.wikipedia.org/wiki/91st_meridian_east 91st meridian east]
# [http://en.wikipedia.org/wiki/92nd_meridian_east 92nd meridian east]

# [http://en.wikipedia.org/wiki/93rd_meridian_east 93rd meridian east]# [http://en.wikipedia.org/wiki/94th_meridian_east 94th meridian east]
# [http://en.wikipedia.org/wiki/95th_meridian_east 95th meridian east]

# [http://en.wikipedia.org/wiki/96th_meridian_east 96th meridian east]

# [http://en.wikipedia.org/wiki/97th_meridian_east 97th meridian east]

# [http://en.wikipedia.org/wiki/98th_meridian_east 98th meridian east]

# [http://en.wikipedia.org/wiki/99th_meridian_east 99th meridian east]


130th meridian east131st meridian east132nd meridian east133rd meridian east134th meridian east135th meridian east136th meridian east137th meridian east138th meridian east139th meridian east140th meridian east141st meridian east142nd meridian east143rd meridian east144th meridian east145th meridian east146th meridian east147th meridian east148th meridian east149th meridian east150th meridian east151st meridian east152nd meridian east153rd meridian east154th meridian east155th meridian east156th meridian east157th meridian east158th meridian east159th meridian east160th meridian east161st meridian east162nd meridian east163rd meridian east164th meridian east165th meridian east166th meridian east167th meridian east168th meridian east169th meridian east170th meridian east171st meridian east172nd meridian east173rd meridian east174th meridian east175th meridian east176th meridian east177th meridian east178th meridian east179th meridian east 180th meridian east

==See Also==

[[List Circles of Latitude]]

[[Lines of Longitude (West)]]

[[Category:HGS Manual]]

[[Category:PEG Gridwork]]