The Grid For Transverse Mercator*
* From: N. Bowditch, American Practical Navigator,
U.S. Navy Hydrographic Office, 1966 Ed.
Transverse Mercator SRF
- in geodetic coordinates the origin is at (0, -p/2, 0)
- the longitude of the, origin is shown as -?/2 (90º W).
The TM coordinate system is orthonormal.
The units on the X and Y axes are in metres.
The projected meridians are curved in this system.