<P> A prime meridian is ultimately arbitrary , unlike an equator , which is determined by the axis of rotation -- and various conventions have been used or advocated in different regions and throughout history . The most widely used modern meridian is the IERS Reference Meridian . It is derived but deviates slightly from the Greenwich Meridian , which was selected as an international standard in 1884 . </P>
<P> A prime meridian is ultimately arbitrary , unlike an equator , which is determined by the axis of rotation -- and various conventions have been used or advocated in different regions and throughout history . The most widely used modern meridian is the IERS Reference Meridian . It is derived but deviates slightly from the Greenwich Meridian , which was selected as an international standard in 1884 . </P>
what is another name for the prime meridian
what is another name for the prime meridian
the IERS Reference Meridian
the IERS Reference Meridian