Lines of longitude, also called meridians, are imaginary lines that divide the Earth. They run north to south from pole to pole, but they measure the distance east or west. Longitude is measured in degrees, minutes, and seconds.

Longitude is the measurement east or west of the prime meridian.

In geography, longitude is the distance on the earth’s surface, east or west of a defined meridian, usually the meridian of Greenwich, England (0° Longitude), expressed in angular measurements from 180° West (or -180°) to 180° East.

4 weeks ago - Longitude (/ˈlɒndʒɪtjuːd/, AU and UK also /ˈlɒŋɡɪ-/) is a geographic coordinate that specifies the east-west position of a point on the surface of the Earth, or another celestial body.

2 weeks ago - In contrast, longitude is a measurement of location east or west of the prime meridian at Greenwich (an imaginary north-south line that passes through both geographic poles and Greenwich, London, England, U.K.).

January 19, 2017 - Longitude is the geographic coordinates that measures a location East or West of the Prime Meridian.

Answer (1 of 3): longitudes, together with latitudes, define a reference coordinate system for locating places on the surface of a sphere, in this case the Earth. The “as the crow flies” distance between two locations can be determined with ...

September 10, 2021 - Longitudes: The vertical lines running north-south, join the two poles. They are called the meridians of longitude.

January 20, 2025 - Lines of longitude run from the top of the Earth to the bottom, and divide up the Earth a bit like the segments of an orange.

February 23, 2021 - But the main reason they get people in such a tizzy might be that their definitions don’t necessarily line up with what we expect for each word. Longitude is defined as the “geographical angular distance east or west on the earth’s surface” or, for the directionally-challenged, left to right.

When people began to travel long distances over deserts or seas, they needed a way to fix their position. Accordingly, a global grid was developed, incorporating lines of latitude and longitude.

July 18, 2024 - Latitude lines, known as parallels, run horizontally from east to west and are used to measure distances north or south of the equator. Longitude lines, called meridians, run vertically from the north and south poles, measuring distances east or west of the Prime Meridian.

As the Earth turns around the Sun once every 24 hours, longitude can be measured with time – specifically, the difference between the local time as defined by the Sun’s position at local noon, and the time at a known place, such as Greenwich.

October 13, 2023 - Longitude and latitude are static geographic coordinates that provide fixed and defined positions on Earth's grid.

May 24, 2024 - Lines of longitude measure distance east or west of the prime meridian. The longitude of a particular location is the distance along a parallel, measured in degrees, between that place and the prime meridian.

The longitude is the angle formed by a line that goes through the center of the earth and the equator where the longitude=0 and another line that goes through the center of the earth and a line through the equator and the meridian that goes through the point of interest.

Longitudes are geographical positioning markers that run from the geographical North Pole to the geographical South Pole, intersecting the equator. They meet at both poles and specify the east-west position of a location.

There are a few named parallels of latitude. The reason for their definition is is explored in the Seasons and Ecliptic Simulator. The primary unit in which longitude and latitude are given is degrees (°). There are 360° of longitude (180° E ↔ 180° W) and 180° of latitude (90° N ↔ 90° S).

April 17, 2021 - Comparing notes after the event would allow a calculation of the time difference, and so the difference in longitude, between the two locations. This was correct in theory but difficult to put into practice. Derek Howse suggests that Ptolemy’s Geography contained only one astronomically determined difference of longitude – that between Arbela and Carthage, established with the observation of an eclipse in 330 BCE.