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A geodetic datum or geodetic system (also: geodetic reference datum, geodetic reference system, or geodetic reference frame, or terrestrial reference frame) is a global datum reference or reference frame for unambiguously representing the position of locations on Earth by means of either geodetic coordinates (and related vertical coordinates) or…
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datum wgs 84 datums reference earth used system gps geodetic coordinates ellipsoid horizontal global vertical nad different local longitude north
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| the 1735 Marine chronometer by John Harrison | instance of | This led to technological innovations | 0.80 | text |
| but also to a reconsideration of the underlying assumptions about the shape of Earth itself | instance of | This led to technological innovations | 0.80 | text |
| the Struve Geodetic Arc across Eastern Europe | instance of | More ambitious undertakings | 0.80 | text |
| Geodetic datum | related to Examples | Examples | 0.60 | section |
| Geodetic datum | related to Examples | WGS | 0.60 | section |
| Geodetic datum | related to Examples | World Geodetic SystemNAD | 0.60 | section |
| Geodetic datum | related to Examples | North American Datum | 0.60 | section |
| Geodetic datum | related to Examples | NAD | 0.60 | section |
| Geodetic datum | related to Examples | Ordnance Survey | 0.60 | section |
| Geodetic datum | related to Examples | Great BritainETRS89 | 0.60 | section |
| Geodetic datum | related to Examples | European Datum | 0.60 | section |
| Geodetic datum | related to Examples | ITRSED50 | 0.60 | section |
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