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| Definition | : | Ordnance Datum Newlyn |
| Category | : | Academic & Science » Architecture & Constructions |
| Country/ Region |
: | United Kingdom
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Initialism
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Ordnance Datum Newlyn (ODN) is a geodetic vertical reference point used in the United Kingdom for measuring elevations and heights above sea level.
ODN is based on the mean sea level at Newlyn in Cornwall, England. It serves as the baseline for determining heights and elevations throughout the United Kingdom.
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Optical Distribution Network
Communication
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Long Seridan Airport
Airport Codes
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The full form of ODN is Ordnance Datum Newlyn