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ED50 (地理坐标系)

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大地测量学
基础
概念
技术
标准 (历史)
1929 海平面基准 NGVD 29
1936 英国国家格网参考系统 OSGB36
1942 SK-42参考系统 SK-42
1950 欧洲测量系统 ED50
1969 南美测量系统（英语：South American Datum#SAD69） SAD69
1980 大地测量系统 GRS 80
1983 北美测量系统（英语：North American Datum#North_American_Datum_of_1983） NAD83
1984 世界大地测量系统 WGS84
1988 北美纵向测量系统（英语：North American Vertical Datum of 1988） NAVD88
1989 欧洲地球参考系统（英语：European Terrestrial Reference System 1989） ETRS89
2002 中国加密测量系统 GCJ-02
2010 地域URI计划（英语：geo URI scheme）Geo URI

ED 50（"European Datum 1950"）是一种第二次世界大战后为地理网络国际交流定义的大地基准。 二战中一些重要的战争发生在因为德国、荷兰、比利时、法国边界。这些国家的地图在经纬度定位方面有冲突。这导致指定ED50作为西欧大部分的地图基准。他从此被用在大多数西欧国家（除了英国、爱尔兰、瑞典、瑞士这些有自己地图基准的国家）。 ED50用了1924年的国际椭球体。

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ED50 (地理坐标系)
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