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1.0 chain (66 ft; 20 m) rod: rd rd 1.0 rd (17 ft; 5.0 m) pole: pole (none) equivalent to a rod 1.0 pole (17 ft; 5.0 m) perch: perch (none) equivalent to a rod 1.0 perch (17 ft; 5.0 m) fathom: fathom (none) assumes 1 fathom ≡ 6 ft 1.0 fathom (6.0 ft; 1.8 m) yard: yd yd assumes the international definition 1.0 yd (0.91 m) yd m; foot: ft (foot) ft
km 2: US spelling: square kilometer: 1.0 km 2 (0.39 sq mi) km2 sqmi; square hectometre: hm2 Q35852: hm 2: US spelling: square hectometer: 1.0 hm 2 (2.5 acres) square decametre: dam2 Q23931040: dam 2: US spelling: square dekameter: 1.0 dam 2 (1,100 sq ft) square metre: m2 Q25343: m 2: US spelling: square meter: 1.0 m 2 (11 sq ft) m2 sqft; square ...
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 template is intended for conversion of heights specified in either metres or in feet and inches. Template parameters [Edit template data] Parameter Description Type Status Metres m metre metres meter meters The height in metres. Do not use if feet and inches are specified. Number optional Centimetres cm centimetre centimetres centimeter centimeters The height in centimetres. Do not use if ...
This template is used to automatically add conversions of height measurements displayed by Template: ... height=2+1/2 ft → 2 + 1 ...
American surveyors use a decimal-based system of measurement devised by Edmund Gunter in 1620. The base unit is Gunter's chain of 66 feet (20 m) which is subdivided into 4 rods, each of 16.5 ft or 100 links of 0.66 feet. A link is abbreviated "lk", and links "lks", in old deeds and land surveys done for the government.
The variation in altitude from the topographical or ground level down to the sphere's or ellipsoid's surface, also changes the scale of distance measurements. [20] The slant distance s (chord length) between two points can be reduced to the arc length on the ellipsoid surface S as: [21]
Near the equator, the lower edge of the stratosphere is as high as 20 km (66,000 ft; 12 mi), at mid-latitudes around 10 km (33,000 ft; 6.2 mi), and at the poles about 7 km (23,000 ft; 4.3 mi). [4] Temperatures range from an average of −51 °C (−60 °F; 220 K) near the tropopause to an average of −15 °C (5.0 °F; 260 K) near the ...