It is preferable to use whichever of either Madrid 1870 (Madrid) to ED50 (2) (code 1027) or Madrid 1870 (Madrid) to ED50 (3) (code 1028) is applicable to the area.
Institut de Geomatica; Barcelona.
2018-05-12
Geodesy.
See CRS code 4903 for recommended coordinate axis representation for the human interface.
Spain - mainland, Balearic Islands, Canary Islands, Ceuta and Melila - onshore and offshore.
Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: dec deg