Greenwich thus became established as the location of the prime meridianoflongitude, and the base line for calculating time zones around the world.
由此格林威治不仅作为起初子午线的所在地,也成为全球计算时区的基准线。
2
The Greenwich meridian was adopted in 1884 by the International meridian Conference as the line with zero degrees oflongitude.
国际本初子午线大会于1884年把横过英国格林尼治天文台的一条经线定为参考线,在该线上经度为零。
3
Meridian These are similar to UTM zones. Both apply to large areas based on a line oflongitude, both are often left out of field data, and the position is not uniquely defined without them!