transverse Mercator map projection

A conformal cylindrical map projection, which is in principle equivalent to the regular Mercator map projection turned (transversed) 90° in azimuth. In this projection, the central meridian is represented by a straight line, corresponding to the line that represents the equator on the regular Mercator map projection. Neither the geographical meridians (except the central meridian) nor the geodetic parallels (except the equator) are represented by straight lines. Also called an inverse cylindrical orthomorphic map projection; an inverse Mercator map projection; and a transverse cylindrical orthomorphic map projection.
The Mercator projection.
Northern Hemisphere transverse Mercator projection with the 0° Greenwich Meridian shown as the central meridian of the projection. The shaped area extended 600 NM either side of the central meridian is the central meridian is the only part of the projection that is of practical navigation use.

Aviation dictionary. 2014.

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