Greenwich mean time (GMT) is mean solar time at the Royal Greenwich Observatory in Greenwich, London, England, which by convention is at 0 degrees geographic longitude.
格林尼治国际标准以英国伦敦格林威治皇家天文台为准，也就是零经度为准。
The coordinate values represent latitude and longitude: "geographic" coordinates, not projected ones.
坐标值代表纬度和经度：“地理”坐标，不是投影坐标。
The latitude and longitude system is probably the best known way to designate geographic coordinates.
经纬度系统可能是最为人熟知的地理坐标设计方法。
The most common projection after geographic (latitude and longitude) is the transverse Mercator projection.
地理学投影（维度和经度）之后，最常用的投影是横向Mercator 投影。
The geographic use of time began during the British Empire with the world divided by latitude and longitude, with zero degrees longitude running through the observatory at Greenwich, in London.
地理时间的使用始于大英帝国时期，当时用纬线和经线划分世界，零度经线通过伦敦的格林尼治天文台。
Each point on Earth is specified by geographic latitude and longitude.
地球上每一点都可以用地理纬度和经度来确定。
Each point on Earth is specified by geographic latitude and longitude.
地球上每一点都可以用地理纬度和经度来确定。
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