On the global grid, the prime meridian is at?

Question

What is the position of the Prime Meridian on the global grid?
- 0 degrees latitude
- 90 degrees latitude
- 0 degrees longitude
- 90 degrees longitude

Anonymous · Accepted Answer

On the global grid, the Prime Meridian is at #0 degrees longitude.

The Prime Meridian is the meridian (line of longitude) at which the longitude is defined to be 0°.

The Prime Meridian and its opposite the 180th meridian (at 180° longitude), which the International Date Line generally follows, form a great circle that divides the Earth into the Eastern and Western Hemispheres.

By international convention, the modern Prime Meridian passes through the Royal Observatory, Greenwich (at 51°28′38″N 0°00′00″E / 51.47722°N 0°E / 51.47722; 0 (Greenwich Observatory)), in southeast London, United Kingdom, known as the International Meridian or Greenwich Meridian, although the Prime Meridian is ultimately arbitrary unlike the parallels of latitude, which are defined by the rotational axis of the Earth with the Poles at 90° and the Equator at 0°.

http://en.wikipedia.org/wiki/Prime_Meridian

Ms. Adela Olson · Answer

First of all, the prime meridian is a line of longitude.
Secondly, “prime” here means the starting place, the zero point.
Sorry JR, the the Prime Meridian does NOT pass through the Royal Observatory.  I know you copied that from the wiki article, but it’s wrong.  It is actually 102.5 meters (336.3 feet) east of the Royal Observatory.  The article is correct when it says that the 0 meridian is the weighted average of the reference meridians of the hundreds of ground stations contributing to the International Terrestrial Reference Frame (ITRF).

Anonymous · Answer

0 degrees longitude. It passes through Greenwich, England.

Elnora Dicki

On the global grid, the prime meridian is at?

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