TermCymru

Results are displayed in Welsh alphabetical order A-Y
Welsh: Datwm Ordnans
English: Ordnance Datum
Status C
Subject: Transport
Part of speech: Noun, Masculine, Singular
Definition: It is a constant for each country and usually given by the Mean Sea Level.
Last updated: 12 May 2006
Welsh: Datwm Ordnans Newlyn
English: Datum Ordnance Newlyn
Status C
Subject: Transport
Part of speech: Noun, Masculine, Singular
Definition: This is our national coordinate system for heights above mean sea level (orthometric heights). It was originally based on tide gauge readings at Newlyn, Cornwall.
Last updated: 12 May 2006