what is the starting point for measuring longitude?

Question

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Answer 1

In 1884, the International Meridian Conference adopted the Greenwich meridian as the universal prime meridian or zero point of longitude.
click here:http://en.wikipedia.org/wiki/Prime_Meridian
http://en.wikipedia.org/wiki/Longitude#History_of_the_measurement_of_longitude

Answer 2

The line of zero longitude is The Prime Meridian. This is also known as the Greenwich Meridian or the Greenwich Mean, hence "Greenwich Mean Time." It was chosen because it passes directly through the Greenwich Observatory, an important astronomical site. Before this was standardized globally in 1884, many different cities were used as zero longitude by local populations. In particular, in "The DaVinci Code," mention is made of how the Paris Meridian was used as the zero point for longitude in the past.

Answer 3

The prime meridian is the starting point for measuring longitude. It matches at 0% longitude. It can go from -180% (western hemisphere) to +180% (eastern hemisphere)

Answer 4

the Prime Meridian is 0 degrees longitude

Answer 5

The Prime Meridian. I'm not exactly certain where it is, but I know that it runs from North to south, and it is theoretically the dividing point of the present day and tomorrow. I also know that it is drawn over the Atlantic Ocean. It is not a straight line though, due to the shore lines of several continents.

Answer 6

Greenwich England

Answer 7

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