Revision history of "Ordnance Datum"

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  • (cur | prev) 20:57, 17 September 2008Tasomerville (talk | contribs). . (1,236 bytes) (+1,236). . (New page: {{ Definition|title=Ordnance Datum (OD) |definition= An Ordnance Datum or OD is a vertical datum used by an ordnance survey as the basis for deriving bathymetric levels on charts. A spot h...)