The prime meridian, which passes through the Royal Observatory at Greenwich, England, adopted internationally as the earth’s zero of longitude in 1884.
- Here the zero lines of longitude and latitude - the Greenwich meridian and the equator - bisect.
- Accurate measurements from space have led to another slight shift of the globe's most important line, and the GPS meridian now lies 102.48 metres east of the old Greenwich meridian.
- I stop just outside the front door, and am rather pleased to discover that I live exactly 0°1'2 ‘west of the Greenwich meridian.’
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