View source for Lines of Longitude (West)

[[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]

==West Lines==
# [http://en.wikipedia.org/wiki/1st_meridian_west 1st meridian west]
# [http://en.wikipedia.org/wiki/2nd_meridian_west 2nd meridian west]
# [http://en.wikipedia.org/wiki/3rd_meridian_west 3rd meridian west]
# [http://en.wikipedia.org/wiki/4th_meridian_west 4th meridian west]
# [http://en.wikipedia.org/wiki/5th_meridian_west 5th meridian west]
# [http://en.wikipedia.org/wiki/6th_meridian_west 6th meridian west]
# [http://en.wikipedia.org/wiki/7th_meridian_west 7th meridian west]
# [http://en.wikipedia.org/wiki/8th_meridian_west 8th meridian west]
# [http://en.wikipedia.org/wiki/9th_meridian_west 9th meridian west]
# [http://en.wikipedia.org/wiki/10th_meridian_west 10th meridian west]
# [http://en.wikipedia.org/wiki/11th_meridian_west 11th meridian west]
# [http://en.wikipedia.org/wiki/12th_meridian_west 12th meridian west]
# [http://en.wikipedia.org/wiki/13th_meridian_west 13th meridian west]
# [http://en.wikipedia.org/wiki/14th_meridian_west 14th meridian west]
# [http://en.wikipedia.org/wiki/15th_meridian_west 15th meridian west]
# [http://en.wikipedia.org/wiki/16th_meridian_west 16th meridian west]
# [http://en.wikipedia.org/wiki/17th_meridian_west 17th meridian west]
# [http://en.wikipedia.org/wiki/18th_meridian_west 18th meridian west]
# [http://en.wikipedia.org/wiki/19th_meridian_west 19th meridian west]
# [http://en.wikipedia.org/wiki/20th_meridian_west 20th meridian west]
# [http://en.wikipedia.org/wiki/21st_meridian_west 21st meridian west]
# [http://en.wikipedia.org/wiki/22nd_meridian_west 22nd meridian west]
# [http://en.wikipedia.org/wiki/23rd_meridian_west 23rd meridian west]
# [http://en.wikipedia.org/wiki/24th_meridian_west 24th meridian west]
# [http://en.wikipedia.org/wiki/25th_meridian_west 25th meridian west]
# [http://en.wikipedia.org/wiki/26th_meridian_west 26th meridian west]
# [http://en.wikipedia.org/wiki/27th_meridian_west 27th meridian west]
# [http://en.wikipedia.org/wiki/28th_meridian_west 28th meridian west]
# [http://en.wikipedia.org/wiki/29th_meridian_west 29th meridian west]
# [http://en.wikipedia.org/wiki/30th_meridian_west 30th meridian west]
# [http://en.wikipedia.org/wiki/31st_meridian_west 31st meridian west]
# [http://en.wikipedia.org/wiki/32nd_meridian_west 32nd meridian west]
# [http://en.wikipedia.org/wiki/33rd_meridian_west 33rd meridian west]
# [http://en.wikipedia.org/wiki/34th_meridian_west 34th meridian west]
# [http://en.wikipedia.org/wiki/35th_meridian_west 35th meridian west]
# [http://en.wikipedia.org/wiki/36th_meridian_west 36th meridian west]
# [http://en.wikipedia.org/wiki/37th_meridian_west 37th meridian west]
# [http://en.wikipedia.org/wiki/38th_meridian_west 38th meridian west]
# [http://en.wikipedia.org/wiki/39th_meridian_west 39th meridian west]
# [http://en.wikipedia.org/wiki/40th_meridian_west 40th meridian west]
# [http://en.wikipedia.org/wiki/41st_meridian_west 41st meridian west]
# [http://en.wikipedia.org/wiki/42nd_meridian_west 42nd meridian west]
# [http://en.wikipedia.org/wiki/43rd_meridian_west 43rd meridian west]
# [http://en.wikipedia.org/wiki/44th_meridian_west 44th meridian west]
# [http://en.wikipedia.org/wiki/45th_meridian_west 45th meridian west]
# [http://en.wikipedia.org/wiki/46th_meridian_west 46th meridian west]
# [http://en.wikipedia.org/wiki/47th_meridian_west 47th meridian west]
# [http://en.wikipedia.org/wiki/48th_meridian_west 48th meridian west]
# [http://en.wikipedia.org/wiki/49th_meridian_west 49th meridian west]
# [http://en.wikipedia.org/wiki/50th_meridian_west 50th meridian west]
# [http://en.wikipedia.org/wiki/51st_meridian_west 51st meridian west]
# [http://en.wikipedia.org/wiki/52nd_meridian_west 52nd meridian west]
# [http://en.wikipedia.org/wiki/53rd_meridian_west 53rd meridian west]
# [http://en.wikipedia.org/wiki/54th_meridian_west 54th meridian west]
# [http://en.wikipedia.org/wiki/55th_meridian_west 55th meridian west]
# [http://en.wikipedia.org/wiki/56th_meridian_west 56th meridian west]
# [http://en.wikipedia.org/wiki/57th_meridian_west 57th meridian west]
# [http://en.wikipedia.org/wiki/58th_meridian_west 58th meridian west]
# [http://en.wikipedia.org/wiki/59th_meridian_west 59th meridian west]
# [http://en.wikipedia.org/wiki/60th_meridian_west 60th meridian west]
# [http://en.wikipedia.org/wiki/61st_meridian_west 61st meridian west]
# [http://en.wikipedia.org/wiki/62nd_meridian_west 62nd meridian west]
# [http://en.wikipedia.org/wiki/63rd_meridian_west 63rd meridian west]
# [http://en.wikipedia.org/wiki/64th_meridian_west 64th meridian west]
# [http://en.wikipedia.org/wiki/65th_meridian_west 65th meridian west]
# [http://en.wikipedia.org/wiki/66th_meridian_west 66th meridian west]
# [http://en.wikipedia.org/wiki/67th_meridian_west 67th meridian west]
# [http://en.wikipedia.org/wiki/68th_meridian_west 68th meridian west]
# [http://en.wikipedia.org/wiki/69th_meridian_west 69th meridian west]
# [http://en.wikipedia.org/wiki/70th_meridian_west 70th meridian west]
# [http://en.wikipedia.org/wiki/71st_meridian_west 71st meridian west]
# [http://en.wikipedia.org/wiki/72nd_meridian_west 72nd meridian west]
# [http://en.wikipedia.org/wiki/73rd_meridian_west 73rd meridian west]
# [http://en.wikipedia.org/wiki/74th_meridian_west 74th meridian west]
# [http://en.wikipedia.org/wiki/75th_meridian_west 75th meridian west]
# [http://en.wikipedia.org/wiki/76th_meridian_west 76th meridian west]
# [http://en.wikipedia.org/wiki/77th_meridian_west 77th meridian west]
# [http://en.wikipedia.org/wiki/78th_meridian_west 78th meridian west]
# [http://en.wikipedia.org/wiki/79th_meridian_west 79th meridian west]
# [http://en.wikipedia.org/wiki/80th_meridian_west 80th meridian west]
# [http://en.wikipedia.org/wiki/81st_meridian_west 81st meridian west]
# [http://en.wikipedia.org/wiki/82nd_meridian_west 82nd meridian west]
# [http://en.wikipedia.org/wiki/83rd_meridian_west 83rd meridian west]
# [http://en.wikipedia.org/wiki/84th_meridian_west 84th meridian west]
# [http://en.wikipedia.org/wiki/85th_meridian_west 85th meridian west]
# [http://en.wikipedia.org/wiki/86th_meridian_west 86th meridian west]
# [http://en.wikipedia.org/wiki/87th_meridian_west 87th meridian west]
# [http://en.wikipedia.org/wiki/88th_meridian_west 88th meridian west]
# [http://en.wikipedia.org/wiki/89th_meridian_west 89th meridian west]
# [http://en.wikipedia.org/wiki/90th_meridian_west 90th meridian west]
# [http://en.wikipedia.org/wiki/91st_meridian_west 91st meridian west]
# [http://en.wikipedia.org/wiki/92nd_meridian_west 92nd meridian west]
# [http://en.wikipedia.org/wiki/93rd_meridian_west 93rd meridian west]
# [http://en.wikipedia.org/wiki/94th_meridian_west 94th meridian west]
# [http://en.wikipedia.org/wiki/95th_meridian_west 95th meridian west]
# [http://en.wikipedia.org/wiki/96th_meridian_west 96th meridian west]
# [http://en.wikipedia.org/wiki/97th_meridian_west 97th meridian west]
# [http://en.wikipedia.org/wiki/98th_meridian_west 98th meridian west]
# [http://en.wikipedia.org/wiki/99th_meridian_west 99th meridian west]
# [http://en.wikipedia.org/wiki/100th_meridian_west 100th meridian west]
# [http://en.wikipedia.org/wiki/101st_meridian_west 101st meridian west]
# [http://en.wikipedia.org/wiki/102nd_meridian_west 102nd meridian west]
# [http://en.wikipedia.org/wiki/103rd_meridian_west 103rd meridian west]
# [http://en.wikipedia.org/wiki/104th_meridian_west 104th meridian west]
# [http://en.wikipedia.org/wiki/105th_meridian_west 105th meridian west]
# [http://en.wikipedia.org/wiki/106th_meridian_west 106th meridian west]
# [http://en.wikipedia.org/wiki/107th_meridian_west 107th meridian west]
# [http://en.wikipedia.org/wiki/108th_meridian_west 108th meridian west]
# [http://en.wikipedia.org/wiki/109th_meridian_west 109th meridian west]
# [http://en.wikipedia.org/wiki/110th_meridian_west 110th meridian west]
# [http://en.wikipedia.org/wiki/111th_meridian_west 111th meridian west]
# [http://en.wikipedia.org/wiki/112th_meridian_west 112th meridian west]
# [http://en.wikipedia.org/wiki/113th_meridian_west 113th meridian west]
# [http://en.wikipedia.org/wiki/114th_meridian_west 114th meridian west]
# [http://en.wikipedia.org/wiki/115th_meridian_west 115th meridian west]
# [http://en.wikipedia.org/wiki/116th_meridian_west 116th meridian west]
# [http://en.wikipedia.org/wiki/117th_meridian_west 117th meridian west]
# [http://en.wikipedia.org/wiki/118th_meridian_west 118th meridian west]
# [http://en.wikipedia.org/wiki/119th_meridian_west 119th meridian west]
# [http://en.wikipedia.org/wiki/120th_meridian_west 120th meridian west]
# [http://en.wikipedia.org/wiki/121st_meridian_west 121st meridian west]
# [http://en.wikipedia.org/wiki/122nd_meridian_west 122nd meridian west]
# [http://en.wikipedia.org/wiki/123rd_meridian_west 123rd meridian west]
# [http://en.wikipedia.org/wiki/124th_meridian_west 124th meridian west]
# [http://en.wikipedia.org/wiki/125th_meridian_west 125th meridian west]
# [http://en.wikipedia.org/wiki/126th_meridian_west 126th meridian west]
# [http://en.wikipedia.org/wiki/127th_meridian_west 127th meridian west]
# [http://en.wikipedia.org/wiki/128th_meridian_west 128th meridian west]
# [http://en.wikipedia.org/wiki/129th_meridian_west 129th meridian west]
# [http://en.wikipedia.org/wiki/130th_meridian_west 130th meridian west]
# [http://en.wikipedia.org/wiki/131st_meridian_west 131st meridian west]
# [http://en.wikipedia.org/wiki/132nd_meridian_west 132nd meridian west]
# [http://en.wikipedia.org/wiki/133rd_meridian_west 133rd meridian west]
# [http://en.wikipedia.org/wiki/134th_meridian_west 134th meridian west]
# [http://en.wikipedia.org/wiki/135th_meridian_west 135th meridian west]
# [http://en.wikipedia.org/wiki/136th_meridian_west 136th meridian west]
# [http://en.wikipedia.org/wiki/137th_meridian_west 137th meridian west]
# [http://en.wikipedia.org/wiki/138th_meridian_west 138th meridian west]
# [http://en.wikipedia.org/wiki/139th_meridian_west 139th meridian west]
# [http://en.wikipedia.org/wiki/140th_meridian_west 140th meridian west]
# [http://en.wikipedia.org/wiki/141st_meridian_west 141st meridian west]
# [http://en.wikipedia.org/wiki/142nd_meridian_west 142nd meridian west]
# [http://en.wikipedia.org/wiki/143rd_meridian_west 143rd meridian west]
# [http://en.wikipedia.org/wiki/144th_meridian_west 144th meridian west]
# [http://en.wikipedia.org/wiki/145th_meridian_west 145th meridian west]
# [http://en.wikipedia.org/wiki/146th_meridian_west 146th meridian west]
# [http://en.wikipedia.org/wiki/147th_meridian_west 147th meridian west]
# [http://en.wikipedia.org/wiki/148th_meridian_west 148th meridian west]
# [http://en.wikipedia.org/wiki/149th_meridian_west 149th meridian west]
# [http://en.wikipedia.org/wiki/150th_meridian_west 150th meridian west]
# [http://en.wikipedia.org/wiki/151st_meridian_west 151st meridian west]
# [http://en.wikipedia.org/wiki/152nd_meridian_west 152nd meridian west]
# [http://en.wikipedia.org/wiki/153rd_meridian_west 153rd meridian west]
# [http://en.wikipedia.org/wiki/154th_meridian_west 154th meridian west]
# [http://en.wikipedia.org/wiki/155th_meridian_west 155th meridian west]
# [http://en.wikipedia.org/wiki/156th_meridian_west 156th meridian west]
# [http://en.wikipedia.org/wiki/157th_meridian_west 157th meridian west]
# [http://en.wikipedia.org/wiki/158th_meridian_west 158th meridian west]
# [http://en.wikipedia.org/wiki/159th_meridian_west 159th meridian west]
# [http://en.wikipedia.org/wiki/160th_meridian_west 160th meridian west]
# [http://en.wikipedia.org/wiki/1601st_meridian_west 161st meridian west]
# [http://en.wikipedia.org/wiki/162nd_meridian_west 162nd meridian west]
# [http://en.wikipedia.org/wiki/163rd_meridian_west 163rd meridian west]
# [http://en.wikipedia.org/wiki/164th_meridian_west 164th meridian west]
# [http://en.wikipedia.org/wiki/165th_meridian_west 165th meridian west]
# [http://en.wikipedia.org/wiki/166th_meridian_west 166th meridian west]
# [http://en.wikipedia.org/wiki/167th_meridian_west 167th meridian west]
# [http://en.wikipedia.org/wiki/168th_meridian_west 168th meridian west]
# [http://en.wikipedia.org/wiki/169th_meridian_west 169th meridian west]
# [http://en.wikipedia.org/wiki/170th_meridian_west 170th meridian west]
# [http://en.wikipedia.org/wiki/171st_meridian_west 171st meridian west]
# [http://en.wikipedia.org/wiki/172nd_meridian_west 172nd meridian west]
# [http://en.wikipedia.org/wiki/173rd_meridian_west 173rd meridian west]
# [http://en.wikipedia.org/wiki/174th_meridian_west 174th meridian west]
# [http://en.wikipedia.org/wiki/175th_meridian_west 175th meridian west]
# [http://en.wikipedia.org/wiki/176th_meridian_west 176th meridian west]
# [http://en.wikipedia.org/wiki/177th_meridian_west 177th meridian west]
# [http://en.wikipedia.org/wiki/178th_meridian_west 178th meridian west]
# [http://en.wikipedia.org/wiki/179th_meridian_west 179th meridian west]
# [http://en.wikipedia.org/wiki/180th_meridian_west 180th meridian west]

==See Also==

[[List Circles of Latitude]]

[[Lines of Longitude (East)]]

[[Category:HGS Manual]]

[[Category:PEG Gridwork]]