Meridian (geography) - Wikipedia
In geography and geodesy, a meridian is the locus connecting points of equal longitude, which is the angle (in degrees or other units) east or west of a given prime meridian (currently, the IERS Reference Meridian). [1] . In other words, it is a coordinate line for longitudes, a line of longitude.
Meridian | Prime Meridian, Longitude & Latitude | Britannica
meridian, imaginary north–south line on the Earth’s surface that connects both geographic poles; it is used to indicate longitude. The 40th meridian, for example, has a longitude of 40° E or 40° W. See latitude and longitude. The prime meridian is zero degrees longitude and divides Earth into the Western and Eastern hemispheres. It is ...
What are the meridians of Earth? - Geographic FAQ Hub: Answers …
2024年6月17日 · Meridians of Earth, also known as lines of longitude, are imaginary lines that divide the Earth’s surface from pole to pole. They measure the distance in degrees east and west of the prime meridian, which passes through Greenwich, England. Here are the answers to some common questions about the meridians of Earth:
Circles Of Latitude And Longitude - WorldAtlas
2021年3月19日 · Circles of Latitude are called parallels while half of a longitudinal circle is called a Meridian. Meridians are important for setting time zones. There are five main parallels that are useful to explain the correlation between the Earth, the Sun, and climate. As such, these five main parallels also mark the five geographical zones. These are:
What is longitude? - NOAA's National Ocean Service
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.
MapMaker: Meridians and Parallels - Education
2024年6月21日 · line of latitude at 66.5 degrees south that encircles the continent of Antarctica. paralell of latitude that runs 66.5 degrees north of the Equator. imaginary line around the Earth, running north-south at 0 degrees longitude. Also called the prime meridian. distance north or south of the Equator, measured in degrees.
Prime meridian - Wikipedia
A prime meridian is an arbitrarily chosen meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great circle.
Latitude, Longitude, & the Prime Meridian Explained | Britannica
Longitude is a system of imaginary north-south lines called meridians. The Earth is a spinning sphere, or ball. The center of the spin is a line called the Earth’s axis. The axis meets the Earth’s surface at two points – the North Pole and the South Pole. Each meridian runs between the North Pole and the South Pole.
Greenwich meridian | Definition, History, Location, Map, & Facts ...
2024年12月27日 · Greenwich meridian, an imaginary line, last established in 1851, that was used to indicate 0° longitude. It passes through Greenwich, a borough of London, and terminates at the North and South poles. Because it indicated 0° longitude, it …
What Are Latitude and Longitude Lines on Maps? - ThoughtCo
2019年11月21日 · The vertical lines on a map are called longitude lines, also known as meridians. Unlike latitude lines, they taper (latitude lines are completely parallel, almost as if stacked on top of each other). They converge at the poles and are widest at the equator. At their widest points, these are about 69 miles or 111 km apart like latitude lines.