Gauss and UTM Conformal Projections and the Plane Rectangular Coordinate System - Geodesy: Introduction to Geodetic Datum and Geodetic Systems - page 294

Table 6.3 Transformation between 3 zones and 6 zones: sample computations

Central meridian of the zones 3 wide coincides with that of the
zones 6 wide

Central meridian of the zones 3 wide coincides with the dividing
meridian of the zones 6 wide

Coordinates of 3 zone (m) Coordinates of 6 zone (m) Coordinates of 3 zone (m) Coordinates of 6 zone (m)

Ellipsoidal parameters

Krassowski Ellipsoid x ﾼ 3,858,520.6946 x ﾼ 3,858,520.6946 x ﾼ 3,858,853.5671 x ﾼ 3,860,592.2479

y false ﾼ 41, 512, 354.9834 y false ﾼ 21, 512, 354.9834 y false ﾼ 42, 420, 902.8543 y false ﾼ 21, 695, 272.9325

GRS75 Ellipsoid x ﾼ 3,858,520.6946 x ﾼ 3,860,592.1771

y false ﾼ 21, 512, 354.9834 y false ﾼ 21, 695, 266.4644

GRS80 Ellipsoid x ﾼ 3,858,520.6946 x ﾼ 3,860,592.1751

y false ﾼ 21, 512, 354.9834 y false ﾼ 21, 695, 266.2813