The Greenwich meridian was adopted in 1884 by the International meridian Conference as the line with zero degrees of longitude.
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。
The Greenwich meridian was adopted in 1884 by the International meridian Conference as the line with zero degrees of longitude.
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。
应用推荐