Gauss and UTM Conformal Projections and the Plane Rectangular Coordinate System - Geodesy: Introduction to Geodetic Datum and Geodetic Systems - page 293

Fig. 6.10 Coordinate
transformation between
zones of 3 and 6 width

When the Central Meridian of the 3 Wide Zone Coincides With the Zone-
Dividing Meridian of the 6 Wide Zone

In Fig. 6.10 , the central meridian of the 3 zone 42 is coincident with the dividing
meridian between zones 21 and 22 of the 6 zone. Their coordinate systems are
different. Given the coordinates of point P 2 in the 3 zone 42 to compute its
coordinates in the 6 zone 21, one can compute the coordinates of point P 2 in the
3 zone 41 according to the method of transformation between adjacent zones, and
then its coordinates in 6 zone 21 can be obtained. The method used to transform
coordinates of 6

zone into those of 3

zone is the same and will not be

repeated here.

Example
Sample computations are provided in Table 6.3 .