The meridian running through Greenwich, England, from which longitude east and west is calculated.

The specific line of longitude that is defined as the 0° point from which east-west measurements are made.

Meridian at Greenwich, England, from which longitude is measured east and west.

the beginning line of longitude from which all other longitude is measured, east and west. It is longitude zero. It is located to run through Greenwich Observatory in London, United Kingdom.

The line of longitude that runs through Greenwich, England and from which longitude is measured east or west. 180 degrees from the Prime Meridian lies the International Date Line.

a line running through Greenwich, England, from which distances east and west of the line are measured.

The line of longitude passing through Greenwich, England. It is 0° and therefore neither east nor west.

An imaginary line running from north to south through Greenwich, England, used as the reference point for longitude.

reference meridian of zero longitude; universally accepted as the Greenwich meridian

meridian at zero degree longitude from which east and west are reckoned (usually the Greenwich longitude in England)

The polar great semi-circle adopted as the reference direction for measurement of longitude. Earth's prime meridian is the Greenwich meridian.

(G). The meridian passing through Greenwich, England, which services as a standard for measuring longitude and Greenwich time.

The line of latitude at 0 degrees longitude.

the imaginary line of longitude passing from the north pole to the south pole through Greenwich, England. The prime meridian is defined as 0° longitude, and is the point for which UTC is defined.

a meridian of longitude 0 degrees that runs through Greenwich, England, and is used as the origin for measurements of longitude.

an imaginary line dividing Earth into Eastern and Western hemisphere; starting place for measuring longitude (0º longitude) and standard time zones

The prime meridian (0 degrees longitude) is the meridian that passes through Greenwich, England.

Meridian of longitude 0 degrees, used as the origin for measurements of longitude. The meridian of Greenwich, England, is the internationally accepted prime meridian on most charts. However, local or national prime meridians are occasionally used.

The baseline for all longitude measurements, a meridian running from the north to the south pole through the Royal Observatory in Greenwich, England.

An imaginary line running from north to south through Greenwich, England, used to measure longitude. The prime meridian is at zero degrees longitude.

The initial meridian or longitude 0 degree (Greenwich Meridian), which creates the plane from which an angle is measured to establish the longitude of a point (see Longitude).

The meridian of zero degrees that is used for measuring longitude, generally the meridian at Greenwich, England

The meridian of longitude which passes through the original site of the Royal Observatory in Greenwich, England and used as the origin of longitude. Also known as the Greenwich Meridian.

The zero longitude location from where east and west is measured. It passes through Greenwich, England.

An imaginary semicircle on the Earth, connecting the North Pole and South Pole through Greenwich, England. See also longitude.

The terrestrial meridian passing through the site of the old Royal Greenwich Observatory; longitude O°.

The line of longitude that passes through Greenwich, England, and that is the zero line for expressing longitude on the Earth's surface.

A line of longitude at 0 degrees that runs through Greenwich, England; used as the origin for measurements of longitude.

The reference line for Longitude in the Lat/Long grid system. All other meridians of longitude are designated in degrees East or West of the Prime Meridian up to 189°. The Prime Meridian is 0° Longitude.

Zero degrees longitude. Also known as the Greenwich Meridian because it was established at the Greenwich Observatory near London, England.

An arbitrarily chosen meridian, used as reference for all others, and defined as 0 degrees longitude.

Zero degrees longitude. Runs through the Royal Greenwich Observatory in Greenwich, England. The prime meridian globe into the Western and Eastern hemispheres. The Earth's time zones are measured from the prime meridian. The time at 0° is called Greenwich Mean Time (GMT) or Universal Time (UT).

The zero meridian (0¡), used as a reference line from which longitude east and west is measured. It passes through Greenwich, England.

The line of latitude assigned a zero value; used as a reference line from which longitude east and west is measured. The Prime Meridian passes through Greenwich, England. Back to the top of the page... Q - S

The location from which meridians of longitude are measured. Has the measure of 0° of longitude. The prime meridian was selected by international agreement to run through Greenwich, England.

The line of longitude that runs through Greenwich, England, used as the origin (zero point) for longitudinal measurements.

The longitude line at 0°, which runs through Greenwich, England.

The line traced out by longitude zero and passing through Greenwich, England. The prime meridian forms the origin for the longitude part of the geographic coordinates and divides the eastern and western hemispheres.

The great circle that passes through Earth's poles and Greenwich, England (0° longitude), from which longitude is measured east and west. See also longitude, geographical or terrestrial.

The Prime Meridian, also known as the International Meridian or Greenwich Meridian, is the meridian (line of longitude) passing through the Royal Greenwich Observatory, Greenwich, England, United Kingdom — it is the meridian at which longitude is defined to be 0 degrees. The prime meridian, and the opposite 180th meridian (at 180° longitude), which the International Date Line generally follows, separate the Eastern and Western Hemispheres. The Prime Meridian and the 180th meridian form a great circle which encircles the Earth like a longitudinal equator.