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Old and new railway mileposts in the UK, indicating a distance of 33 + 1 ⁄ 4 miles (53.5 km) from the zero point The Railways Clauses Consolidation Act 1845 [ 8 ] compels UK railway companies to provide their passengers with a means of determining the distance travelled (fares were set by distance at this time).
Height above mean sea level is a measure of a location's vertical distance (height, elevation or altitude) in reference to a vertical datum based on a historic mean sea level. In geodesy, it is formalized as orthometric height. The zero level varies in different countries due to different reference points and historic measurement periods.
Locations of the world's 14 eight-thousanders, which are split between the Himalayan (right, including Nanga Parbat, left), and the Karakoram mountain ranges (left). The eight-thousanders are the 14 mountains recognized by the International Mountaineering and Climbing Federation (UIAA) as being more than 8,000 metres (26,247 ft) in height above sea level, and sufficiently independent of ...
The largest unit for expressing distances across space at that time was the astronomical unit, equal to the radius of the Earth's orbit at 150 million kilometres (93 million miles). In those terms, trigonometric calculations based on 61 Cygni's parallax of 0.314 arcseconds, showed the distance to the star to be 660 000 astronomical units (9.9 ...
Donner Pass is a 7,056-foot-high (2,151 m) [2] mountain pass in the northern Sierra Nevada, above Donner Lake and Donner Memorial State Park about 9 miles (14 km) west of Truckee, California. Like the Sierra Nevada themselves, the pass has a steep approach from the east and a gradual approach from the west.
The state has 11,037 inland lakes comprising 1,305 square miles (3,380 km 2) of inland water. No point in Michigan is more than 6 miles (9.7 km) from an inland lake or more than 85 miles (137 km) from one of the Great Lakes. [5] The state's numerous rivers are generally short and shallow, though several are navigable by recreational watercraft.
Near the crest of the Fairweather Mountains sit the Lituya and the North Crillon glaciers. They are each about 12 miles (19 km) long and 1 mile (1.6 km) wide with an elevation of 4,000 feet (1,200 m). The retreats of these glaciers form the present "T" shape of the bay, the Gilbert and Crillon inlets. [10]
Peak XV (measured in feet) was calculated to be exactly 29,000 ft (8,839.2 m) high, but was publicly declared to be 29,002 ft (8,839.8 m) in order to avoid the impression that an exact height of 29,000 feet (8,839.2 m) was nothing more than a rounded estimate. [31]