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Earth radius (denoted as R 🜨 or R E) is the distance from the center of Earth to a point on or near its surface. Approximating the figure of Earth by an Earth spheroid (an oblate ellipsoid), the radius ranges from a maximum (equatorial radius, denoted a) of nearly 6,378 km (3,963 mi) to a minimum (polar radius, denoted b) of nearly 6,357 km (3,950 mi).
The International Olympic Committee agreed in 1907 that the distance for the 1908 London Olympic marathon would be about 25 miles or 40 kilometers. The organizers decided on a course of 26 miles from the start at Windsor Castle to the royal entrance to the White City Stadium , followed by a lap (586 yards 2 feet; 536 m) of the track, finishing ...
The centre of the standard geographic model as viewed on a traditional world map is the point 0°, 0° (the coordinates of zero degrees latitude by zero degrees longitude), which is located in the Atlantic Ocean about 614 km (382 mi) south of Accra, Ghana, in the Gulf of Guinea.
According to the United States Census Bureau, the city has a total area of 162.27 square miles (420.3 km 2), of which 159.86 square miles (414.0 km 2) is land and 2.41 square miles (6.2 km 2) (0.52%) is water. [4] The city is built over rolling terrain at an elevation of about 220 feet (67 m) above sea level. [27]
The equator is the circle of latitude that divides Earth into the Northern and Southern hemispheres. It is an imaginary line located at 0 degrees latitude, about 40,075 km (24,901 mi) in circumference, halfway between the North and South poles. [1] The term can also be used for any other celestial body that is roughly spherical.
Detailed map of Austria Satellite photo of the Alps. Austria may be divided into three unequal geographical areas. The largest part of Austria (62%) is occupied by the relatively young mountains of the Alps, but in the east, these give way to a part of the Pannonian plain, and north of the river Danube lies the Bohemian Forest, an older, but lower, granite mountain range.
It also has an exclusive economic zone of 334,671 km 2 (129,217 sq mi) based on 200 metres (656 ft) nautical miles from its coastal baseline. Malaysia claims 200 metres (656 ft) in the depth of the continental shelf or to the depth of exploration within the area below the South China Sea known as Sundaland .
Map of racial distribution in Tucson, 2010 U.S. census. Each dot is 25 people: ⬤ White ⬤ Black ⬤ Asian ⬤ Hispanic ⬤ Other. As of the census of 2010, 520,116 people, 229,762 households, and 112,455 families resided in the city. The population density was 2,500.1 inhabitants per square mile (965.3 inhabitants/km 2).