- corresponds to “ordnance datum”
- niveau général de la France m
Dictionary of Engineering, architecture and construction – materials & technologies, 2nd edition, la Maison du dictionnaire. 2007.
Dictionary of Engineering, architecture and construction – materials & technologies, 2nd edition, la Maison du dictionnaire. 2007.
Prime Meridian — 0° Prime Meridian … Wikipedia
European Terrestrial Reference System 1989 — The European Terrestrial Reference System 1989 (ETRS89) is a ECEF (Earth Centered, Earth Fixed) geodetic Cartesian reference frame, in which the Eurasian Plate as a whole is static. The coordinates and maps in Europe based on ETRS89 are not… … Wikipedia