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.

X

Y

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