100th meridian west
LINE OF LONGITUDE WEST OF THE GREENWICH MERIDIAN
Longitude 100 degrees W; 100th meridian west of Greenwich; 100W
The meridian 100° west of the Prime Meridian of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole. The 100th meridian west forms a great circle with the 80th meridian east.