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48°
48th meridian west
The meridian 48° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Greenland, the Atlantic Ocean, South America, the Southern Ocean, and Antarctica to the South Pole.
The 48th meridian west forms a great circle with the 132nd meridian east.
The map indexing scheme of Canada's National Topographic System begins in the east at the 48th meridian west.