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P a g e s f o r l o g g e d o u t e d i t o r s l e a r n m o r e ● C o n t r i b u t i o n s ● T a l k
( T o p )
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T o g g l e t h e t a b l e o f c o n t e n t s
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A p p e a r a n c e
F r o m W i k i p e d i a , t h e f r e e e n c y c l o p e d i a
Not to be confused with ante meridiem (
AM ), the time before midday, for which see
12-hour clock .
The 180th meridian on a map of Earth. The International Date Line zigzags around the 180th Meridian.
The 180th meridian or antimeridian [1] meridian 180° both east and west of the prime meridian in a geographical coordinate system . The longitude at this line can be given as either east or west .
On Earth , the prime and 180th meridians form a great circle that divides the planet into the Western and Eastern Hemispheres . The antimeridian passes mostly through the open waters of the Pacific Ocean but also runs across land in Russia , Fiji , and Antarctica . An important function of this meridian is its use as the basis for the International Date Line , which snakes around national borders to maintain date consistency within the territories of Russia, the United States, Kiribati, Fiji and New Zealand.
Starting at the North Pole of the Earth and heading south to the South Pole , the 180th meridian passes through:
Co-ordinates
Country, territory or sea
Notes
90°0′N 180°0′E / 90.000°N 180.000°E / 90.000; 180.000 (Arctic Ocean ) Arctic Ocean
North Pole
71°32′N 180°0′E / 71.533°N 180.000°E / 71.533; 180.000 (Russia ) Russia
Chukotka Autonomous Okrug — Wrangel Island
70°58′N 180°0′E / 70.967°N 180.000°E / 70.967; 180.000 (Chukchi Sea ) Chukchi Sea
68°59′N 180°0′E / 68.983°N 180.000°E / 68.983; 180.000 (Russia ) Russia
Chukotka Autonomous Okrug
65°02′N 180°0′E / 65.033°N 180.000°E / 65.033; 180.000 (Bering Sea ) Bering Sea
52°0′N 180°0′E / 52.000°N 180.000°E / 52.000; 180.000 (Amchitka Pass ) Amchitka Pass
Passing just east of Semisopochnoi Island , Alaska , United States (at 51°57′N 179°47′E / 51.950°N 179.783°E / 51.950; 179.783 (Semisopochnoi Island )
51°0′N 180°0′E / 51.000°N 180.000°E / 51.000; 180.000 (Pacific Ocean ) Pacific Ocean
Passing just east of Nukulaelae atoll, Tuvalu (at 9°25′S 179°52′E / 9.417°S 179.867°E / -9.417; 179.867 (Nukulaelae atoll ) Cikobia-i-Lau , Fiji (at 15°43′S 179°59′W / 15.717°S 179.983°W / -15.717; -179.983 (Cikobia )
16°9′S 180°0′E / 16.150°S 180.000°E / -16.150; 180.000 (Fiji ) Fiji
Islands of Vanua Levu , Rabi , and Taveuni
16°59′S 180°0′E / 16.983°S 180.000°E / -16.983; 180.000 (Pacific Ocean ) Pacific Ocean
Passing just east of the island of Moala , Fiji (at 18°33′S 179°57′E / 18.550°S 179.950°E / -18.550; 179.950 (Moala ) Totoya , Fiji (at 19°0′S 179°52′W / 19.000°S 179.867°W / -19.000; -179.867 (Totoya ) Matuku , Fiji (at 19°10′S 179°47′E / 19.167°S 179.783°E / -19.167; 179.783 (Matuku )
60°0′S 180°0′E / 60.000°S 180.000°E / -60.000; 180.000 (Southern Ocean ) Southern Ocean
78°13′S 180°0′E / 78.217°S 180.000°E / -78.217; 180.000 (Antarctica ) Antarctica
Ross Dependency , claimed by New Zealand
90°0′S 180°0′E / 90.000°S 180.000°E / -90.000; 180.000 (Amundsen–Scott South Pole Station ) Antarctica
Amundsen–Scott South Pole Station , South Pole
180° Meridian, Taveuni , Fiji . The man pictured is facing southward.
The meridian also passes between (but not particularly close to):
The only places where roads cross this meridian are in Fiji and Russia. Fiji has several such roads and some buildings very close to it. Russia has three roads in the Chukotka Autonomous Okrug .
Software representation problems [ edit ]
Many geographic software libraries or data formats project the world to a rectangle; very often this rectangle is split exactly at the 180th meridian. This often makes it non-trivial to do simple tasks (like representing an area, or a line) over the 180th meridian. Some examples:
The GeoJSON specification strongly suggests splitting geometries so that neither of their parts cross the antimeridian.[2]
In OpenStreetMap , areas (like the boundary of Russia) are split at the 180th meridian.
QGIS may present lines and polygons in a wrapped way if they cross the 180 meridian.
See also [ edit ]
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=180th_meridian&oldid=1215981318 " C a t e g o r i e s : ● M e r i d i a n s ( g e o g r a p h y ) ● P a c i f i c O c e a n H i d d e n c a t e g o r i e s : ● A r t i c l e s w i t h s h o r t d e s c r i p t i o n ● S h o r t d e s c r i p t i o n i s d i f f e r e n t f r o m W i k i d a t a ● L i s t s o f c o o r d i n a t e s ● G e o g r a p h i c c o o r d i n a t e l i s t s ● A r t i c l e s w i t h G e o ● P a g e s u s i n g g a d g e t W i k i M i n i A t l a s
● T h i s p a g e w a s l a s t e d i t e d o n 2 8 M a r c h 2 0 2 4 , a t 0 9 : 5 1 ( U T C ) . ● T e x t i s a v a i l a b l e u n d e r t h e C r e a t i v e C o m m o n s A t t r i b u t i o n - S h a r e A l i k e L i c e n s e 4 . 0 ;
a d d i t i o n a l t e r m s m a y a p p l y . B y u s i n g t h i s s i t e , y o u a g r e e t o t h e T e r m s o f U s e a n d P r i v a c y P o l i c y . W i k i p e d i a ® i s a r e g i s t e r e d t r a d e m a r k o f t h e W i k i m e d i a F o u n d a t i o n , I n c . , a n o n - p r o f i t o r g a n i z a t i o n . ● P r i v a c y p o l i c y ● A b o u t W i k i p e d i a ● D i s c l a i m e r s ● C o n t a c t W i k i p e d i a ● C o d e o f C o n d u c t ● D e v e l o p e r s ● S t a t i s t i c s ● C o o k i e s t a t e m e n t ● M o b i l e v i e w
