Longitude (/ ˈ l ɒ n dʒ ɪ tj uː d /, AU and UK also / ˈ l ɒ ŋ ɡ ɪ-/) [1] [2] is a geographic coordinate that specifies the east-west position of a point on the surface of the Earth, or another celestial body. It is an angular measurement, usually expressed in degrees and denoted by the Greek letter lambda (λ).

A geographic coordinate system (GCS) is a spherical or geodetic coordinate system for measuring and communicating positions directly on Earth as latitude and longitude. [1] . It is the simplest, oldest and most widely used type of the various spatial reference systems that are in use, and forms the basis for most others.

La longitude d'un point sur Terre (ou sur une autre sphère) est une coordonnée géographique représentée par une valeur angulaire, expression du positionnement est-ouest du point. Une longitude se mesure par rapport à une référence arbitraire qui, sur Terre, est généralement le méridien de Greenwich.

Longitude is a way to say where a place is on the Earth. It is measured starting from an imaginary north–south line called the Prime Meridian . (A meridian is an imaginary line drawn from the North Pole to the South Pole .)

Longitude is a 2000 TV drama produced by Granada Television and the A&E Network for Channel 4, first broadcast between 2 and 3 January 2000 in the UK on Channel 4 and the US on A&E. It is a dramatisation of the 1995 book of the same title by Dava Sobel.

2025年2月10日 · Latitude and longitude, coordinate system by means of which the position or location of any place on Earth’s surface can be determined and described. Latitude is a measurement of location north or south of the Equator. Longitude is a similar measurement east or west of the Greenwich meridian.

A geographical coordinate system is a coordinate system. This means that every place can be specified by three sets of three numbers, called coordinates. A full circle can be divided into 360 degrees (or 360°); this was first done by the Babylonians; Ancient Greeks, like Ptolemy later extended the theory. Today, degrees are divided further.

The history of longitude describes the centuries-long effort by astronomers, cartographers and navigators to discover a means of determining the longitude (the east-west position) of any given place on Earth. The measurement of longitude is important to both cartography and navigation.

2024年10月13日 · longitude (countable and uncountable, plural longitudes) Angular distance measured west or east of the prime meridian. Coordinate term: latitude

Cartographers and geographers trace horizontal and vertical lines called latitudes and longitudes across Earth's surface to locate points on the globe. Longitudes and latitudes form Earth's geographical coordinates.