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The meridian 26° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Greenland, the Atlantic Ocean, the Southern Ocean, and Antarctica to the South Pole. The 26th meridian west forms a great circle with the 154th meridian east.
The meridian 123° west 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 123rd meridian west forms a great circle with the 57th meridian east.
The meridian 75° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Atlantic Ocean, the Caribbean Sea, South America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.
Being B the latitude (+N/-S), L the longitude (+E/-W). LHA = GHA + L is the local hour angle (+W/-E), Dec and GHA are the declination and Greenwich hour angle of the star observed. And Ho is the true or observed altitude, that is, the altitude measured with a sextant corrected for dip, refraction and parallax.
The meridian 107° west 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 107th meridian west forms a great circle with the 73rd meridian east.
One of the four 45 x 90 points is located in Rietbrock, Wisconsin, where the 45th parallel north intersects with the 90th meridian west, marking the halfway point between the 90° Latitude North, 180th Meridian East & West, 0° latitude, and 0° longitude.
The meridian 122° west 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. 122°W is the Seventh Meridian of the Dominion Land Survey in Canada. The 122nd meridian west forms a great circle with the 58th meridian ...
The meridian 169° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole, crossing a smaller amount of land than any other line of longitude, and is thus generally used as the cut-off point on a lot of map projections.