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छो r2.7.3) (रोबॉट: ln:Monkɔlɔ́tɔ molaí की जगह ln:Monkɔ́lɔ́tɔ́ molaí जोड़ रहा है
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पंक्ति 10:
== रेखांश का आकलन ==
{{अनुवाद}}
Longitude is given as an [[angle|angular measurement]] ranging from 0° at the prime meridian to +180° eastward and −180° westward. The [[Greek alphabet|Greek letter]] [[Lambda|λ (lambda)]],<ref>[http://www.colorado.edu/geography/gcraft/notes/datum/gif/llhxyz.gif Coordinate Conversion]</ref><ref>"λ = Longitude east of Greenwich (for longitude west of Greenwich, use a minus sign)."<br />John P. Snyder, ''[http://pubs.er.usgs.gov/usgspubs/pp/pp1395 Map Projections, A Working Manual]'', [[USGS]] Professional Paper 1395, page ix</ref> is used to denote the location of a place on [[Earth]] [[east]] or [[west]] of the prime meridian.
 
Each degree of longitude is sub-divided into 60 [[minute of arc|minutes]], each of which divided into 60 [[arcsecond|seconds]]. A longitude is thus specified in [[sexagesimal]] notation as ''23°&nbsp;27′&nbsp;30"&nbsp;E''. For higher precision, the seconds are specified with a [[Decimal#Decimal fractions|decimal fraction]]. An alternative representation uses degrees and minutes, where parts of a minute are expressed in decimal notation with a fraction, thus: ''23°&nbsp;27.500′&nbsp;E''. Degrees may also be expressed as a decimal fraction: ''23.45833°&nbsp;E''. For calculations, the angular measure usually must be converted to [[radians]], so longitude may also be expressed in this manner as a signed fraction of π ([[pi]]), or an unsigned fraction of 2π.
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