<P> In 1884, at the International Meridian Conference in Washington, D.C., 22 countries voted to adopt the Greenwich meridian as the prime meridian of the world . The French argued for a neutral line, mentioning the Azores and the Bering Strait, but eventually abstained and continued to use the Paris meridian until 1911 . </P> <Table> <Tr> <Th> Locality </Th> <Th> Modern longitude </Th> <Th> Meridian name </Th> <Th> </Th> </Tr> <Tr> <Td> Bering Strait </Td> <Td> 168 ° 30 ′ W </Td> <Td> </Td> <Td> <Ul> <Li> Bering Strait offered 1884 as possibility for a "neutral prime meridian" by Pierre Janssen at the International Meridian Conference </Li> </Ul> </Td> </Tr> <Tr> <Td> Washington, D.C. </Td> <Td> 77 ° 03 ′ 56.07" W (1897) or 77 ° 04 ′ 02.24" W (NAD 27) or 77 ° 04 ′ 01.16" W (NAD 83) </Td> <Td> New Naval Observatory meridian </Td> <Td> </Td> </Tr> <Tr> <Td> Washington, D.C. </Td> <Td> 77 ° 02 ′ 48.0" W, 77 ° 03 ′ 02.3", 77 ° 03 ′ 06.119" W or 77 ° 03 ′ 06.276" W (both presumably NAD 27). If NAD27, the latter would be 77 ° 03 ′ 05.194" W (NAD 83) </Td> <Td> Old Naval Observatory meridian </Td> <Td> </Td> </Tr> <Tr> <Td> Washington, D.C. </Td> <Td> 77 ° 02 ′ 11.56299" W (NAD 83), 77 ° 02 ′ 11.55811" W (NAD 83), 77 ° 02 ′ 11.58325" W (NAD 83) (three different monuments originally intended to be on the White House meridian) </Td> <Td> White House meridian </Td> <Td> </Td> </Tr> <Tr> <Td> Washington, D.C. </Td> <Td> 77 ° 00 ′ 32.6" W (NAD 83) </Td> <Td> Capitol meridian </Td> <Td> </Td> </Tr> <Tr> <Td> Philadelphia </Td> <Td> 75 ° 10 ′ 12" W </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Rio de Janeiro </Td> <Td> 43 ° 10 ′ 19" W </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Fortunate Isles / Azores </Td> <Td> 25 ° 40 ′ 32" W </Td> <Td> </Td> <Td> Used until the Middle Ages, proposed as one possible neutral meridian by Pierre Janssen at the International Meridian Conference </Td> </Tr> <Tr> <Td> El Hierro (Ferro), Canary Islands </Td> <Td> 18 ° 03 ′ W, later redefined as 17 ° 39 ′ 46" W </Td> <Td> Ferro meridian </Td> <Td> </Td> </Tr> <Tr> <Td> Tenerife </Td> <Td> 16 ° 38' 22" W </Td> <Td> Tenerife meridian </Td> <Td> Rose to prominence with Dutch cartographers and navigators after they abandoned the idea of a magnetic meridian </Td> </Tr> <Tr> <Td> Cadiz </Td> <Td> 6 ° 17' 40" W </Td> <Td> San Fernando meridian </Td> <Td> </Td> </Tr> <Tr> <Td> Lisbon </Td> <Td> 9 ° 07 ′ 54.862" W </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Madrid </Td> <Td> 3 ° 41 ′ 16.58" W </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Greenwich </Td> <Td> 0 ° 00 ′ 05.3101" W </Td> <Td> Greenwich meridian </Td> <Td> Airy Meridian </Td> </Tr> <Tr> <Td> Greenwich </Td> <Td> 0 ° 00 ′ 05.33" W </Td> <Td> United Kingdom Ordnance Survey Zero Meridian </Td> <Td> Bradley Meridian </Td> </Tr> <Tr> <Td> Greenwich </Td> <Td> 0 ° 00 ′ 00.00" </Td> <Td> IERS Reference Meridian </Td> <Td> </Td> </Tr> <Tr> <Td> Paris </Td> <Td> 2 ° 20 ′ 14.025" E </Td> <Td> Paris meridian </Td> <Td> </Td> </Tr> <Tr> <Td> Brussels </Td> <Td> 4 ° 22 ′ 4.71" E </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Antwerp </Td> <Td> 4 ° 24 ′ E </Td> <Td> Antwerp meridian </Td> <Td> </Td> </Tr> <Tr> <Td> Amsterdam </Td> <Td> 4 ° 53 ′ E </Td> <Td> </Td> <Td> through the Westerkerk in Amsterdam; used to define the legal time in the Netherlands from 1909 to 1937 </Td> </Tr> <Tr> <Td> Bern </Td> <Td> 7 ° 26 ′ 22.5" E </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Pisa </Td> <Td> 10 ° 24 ′ E </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Oslo (Kristiania) </Td> <Td> 10 ° 43 ′ 22.5" E </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Florence </Td> <Td> 11 ° 15 ′ E </Td> <Td> Florence meridian </Td> <Td> used in the Peters projection, antipode of a line running through the Bering Strait </Td> </Tr> <Tr> <Td> Rome </Td> <Td> 12 ° 27 ′ 08.4" E </Td> <Td> meridian of Monte Mario </Td> <Td> Used in Roma 40 Datum </Td> </Tr> <Tr> <Td> Copenhagen </Td> <Td> 12 ° 34 ′ 32.25" E </Td> <Td> </Td> <Td> Rundetårn </Td> </Tr> <Tr> <Td> Naples </Td> <Td> 14 ° 15 ′ E </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Bratislava </Td> <Td> 17 ° 06 ′ 03" E </Td> <Td> Meridianus Posoniensis </Td> <Td> Used by Sámuel Mikoviny </Td> </Tr> <Tr> <Td> Stockholm </Td> <Td> 18 ° 03 ′ 29.8" E </Td> <Td> </Td> <Td> at the Stockholm Observatory </Td> </Tr> <Tr> <Td> Kraków </Td> <Td> 19 ° 57 ′ 21.43" E </Td> <Td> Kraków meridian </Td> <Td> at the Old Kraków Observatory at the Śniadecki' College; mentioned also in Nicolaus Copernicus's work On the Revolutions of the Heavenly Spheres . </Td> </Tr> <Tr> <Td> Warsaw </Td> <Td> 21 ° 00 ′ 42" E </Td> <Td> Warsaw meridian </Td> <Td> </Td> </Tr> <Tr> <Td> Oradea </Td> <Td> 21 ° 55 ′ 16" E </Td> <Td> </Td> <Td> Between 1464 and 1667, a prime meridian was set in the Fortress of Oradea (Varadinum at the time) by Georg von Peuerbach . </Td> </Tr> <Tr> <Td> Alexandria </Td> <Td> 29 ° 53 ′ E </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Saint Petersburg </Td> <Td> 30 ° 19 ′ 42.09" E </Td> <Td> Pulkovo meridian </Td> <Td> </Td> </Tr> <Tr> <Td> Great Pyramid of Giza </Td> <Td> 31 ° 08 ′ 03.69" E </Td> <Td> </Td> <Td> 1884 </Td> </Tr> <Tr> <Td> Jerusalem </Td> <Td> 35 ° 13 ′ 47.1" E </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Mecca </Td> <Td> 39 ° 49 ′ 34" E </Td> <Td> </Td> <Td> see also Mecca Time </Td> </Tr> <Tr> <Td> Ujjain </Td> <Td> 75 ° 47 ′ E </Td> <Td> </Td> <Td> Used from 4th century CE Indian astronomy and calendars (see also Time in India). </Td> </Tr> <Tr> <Td> Kyoto </Td> <Td> 136 ° 14 ′ E </Td> <Td> </Td> <Td> Used in 18th and 19th (officially 1779--1871) century Japanese maps . Exact place unknown, but in "Kairekisyo" in Nishigekkoutyou - town in Kyoto, then the capital . </Td> </Tr> <Tr> <Td> </Td> <Td> ~ 180 </Td> <Td> </Td> <Td> Opposite of Greenwich, proposed 13 October 1884 on the International Meridian Conference by Sandford Fleming </Td> </Tr> </Table> <Tr> <Th> Locality </Th> <Th> Modern longitude </Th> <Th> Meridian name </Th> <Th> </Th> </Tr> <Tr> <Td> Bering Strait </Td> <Td> 168 ° 30 ′ W </Td> <Td> </Td> <Td> <Ul> <Li> Bering Strait offered 1884 as possibility for a "neutral prime meridian" by Pierre Janssen at the International Meridian Conference </Li> </Ul> </Td> </Tr>

You can use other countries to describe relative location or prime meridian