411 REFERENCE · Wikipedia
12th meridian west
Reference material by Wikipedia contributors. This retains its source identity and is not 411 news reporting.
Line of longitude
-12
The meridian 12° west of Greenwich is a line of longitudeWhat is longitude? https://oceanservice.noaa.gov/facts/longitude.html oceanservice.noaa.gov 30 June 2025 en that extends from the North Pole across the Arctic Ocean, Greenland, the Atlantic Ocean, Africa, the Southern Ocean, and Antarctica to the South Pole.
The 12th meridian west forms a great circle with the 168th meridian east.
Part of the border between Western Sahara and Mauritania is defined by the meridian.African Boundaries: A Legal and Diplomatic Encyclopedia Brownlie Ian Ian Brownlie Institute for International Affairs, Hurst and Co. 1979 437–44
From Pole to Pole
Starting at the North Pole and heading south to the South Pole, the 12th meridian west passes through:
{| class="wikitable plainrowheaders"
! scope="col" width="125" | Co-ordinates
! scope="col" | Country, territory or sea
! scope="col" | Notes
|-
| style="background:#b0e0e6;" | 90 0 N 12 0 W type:waterbody Arctic Ocean
! scope="row" style="background:#b0e0e6;" | Arctic Ocean
| style="background:#b0e0e6;" |
|-
| 81 37 N 12 0 W type:country Greenland
! scope="row" |
|
|-
| style="background:#b0e0e6;" | 81 18 N 12 0 W type:waterbody Atlantic Ocean
! scope="row" style="background:#b0e0e6;" | Atlantic Ocean
| style="background:#b0e0e6;" |
|-
| 28 7 N 12 0 W type:country Morocco
! scope="row" |
|
|-
| 27 40 N 12 0 W type:country Western Sahara
! scope="row" | Western Sahara
| Claimed by and the SADR Sahrawi Arab Democratic Republic
|-valign="top"
| 26 0 N 12 0 W type:country Western Sahara / Mauritania border
! scope="row" | Western Sahara / border
|
|-
| 23 27 N 12 0 W type:country Mauritania
! scope="row" |
|
|-
| 14 46 N 12 0 W type:country Mali
! scope="row" |
|
|-
| 14 12 N 12 0 W type:country Senegal
! scope="row" |
| For about 13 km
|-
| 14 4 N 12 0 W type:country Mali
! scope="row" |
| For about 11 km
|-
| 13 58 N 12 0 W type:country Senegal
! scope="row" |
|
|-
| 13 46 N 12 0 W type:country Mali
! scope="row" |
|
|-
| 13 34 N 12 0 W type:country Senegal
! scope="row" |
|
|-
| 12 24 N 12 0 W type:country Guinea
! scope="row" |
|
|-
| 9 54 N 12 0 W type:country Sierra Leone
! scope="row" |
|
|-valign="top"
| style="background:#b0e0e6;" | 7 12 N 12 0 W type:waterbody Atlantic Ocean
! scope="row" style="background:#b0e0e6;" | Atlantic Ocean
| style="background:#b0e0e6;" | Passing just east of the island of Tristan da Cunha, (at 37 7 S 12 13 W type:isle Tristan da Cunha)
|-
| style="background:#b0e0e6;" | 60 0 S 12 0 W type:waterbody Southern Ocean
! scope="row" style="background:#b0e0e6;" | Southern Ocean
| style="background:#b0e0e6;" |
|-
| 71 18 S 12 0 W type:country Antarctica
! scope="row" | Antarctica
| Queen Maud Land, claimed by
|-
|}
See also
11th meridian west
13th meridian west
References
collapsed
w012 meridian west
Category:Mauritania–Western Sahara border