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The 45th parallel north is often called the halfway point between the equator and the North Pole, but the true halfway point is 16.038487 km (9.965854 mi) north of it (at approximately 45°08'39.544") because Earth is an oblate spheroid; that is, it bulges at the equator and is flattened at the poles. [1]
It is the line that marks the theoretical halfway point between the equator and the South Pole. The true halfway point is 16.2 km (10.1 mi) south of this parallel because Earth is not a perfect sphere, but bulges at the equator and is flattened at the poles. [1] Unlike its northern counterpart, almost all (97%) of it passes through open ocean.
The historic 2,170-mile (3,490 km) [2] Oregon Trail connected various towns along the Missouri River to Oregon's Willamette Valley. It was used during the 19th century by Great Plains pioneers who were seeking fertile land in the West and North. As the trail developed it became marked by numerous cutoffs and shortcuts from Missouri to Oregon.
Halfway is located 54 miles (87 km) east of Baker City, along Oregon Route 86, halfway between Pine and Cornucopia, which gave the town its name. [12] The city's geographic coordinates of 44°52′42″N 117°6′38″W (making it close to the midpoint between the equator and the North Pole) were part of the reason for Half.com to choose the ...
On the other hand, the greatest straight line distance that could in theory be covered is a trip exactly on the Equator, a distance of 40,075 kilometres (24,901 mi). The Earth's equatorial bulge makes this slightly longer than a north–south trip around the world along a set of meridian lines, which is a distance of 40,008 kilometres (24,860 mi).
A diagram illustrating great-circle distance (drawn in red) between two points on a sphere, P and Q. Two antipodal points, u and v are also shown. The great-circle distance, orthodromic distance, or spherical distance is the distance between two points on a sphere, measured along the great-circle arc between them. This arc is the shortest path ...
From a point halfway between Foxholm and Burlington, and the southeast edge of Minot, US 52 is co-signed with US 2. As US 2/US 52 passes through the south part of Minot, it intersects with the US 83 Bypass, and then US 83 itself. Further south, US 52 is also co-signed with US 281 for 44 miles (71 km) between Carrington and Jamestown. The route ...
If a navigator begins at P 1 = (φ 1,λ 1) and plans to travel the great circle to a point at point P 2 = (φ 2,λ 2) (see Fig. 1, φ is the latitude, positive northward, and λ is the longitude, positive eastward), the initial and final courses α 1 and α 2 are given by formulas for solving a spherical triangle
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