ellipsoidal transverse Mercator
Aspects of: Mercator
Parameters: Center scale factor
Geocart menu class: Cylindric
Transverse aspect of Mercator projection
Meridians and parallels: Central meridian, each meridian 90° from central meridian, and the Equator are straight lines. Other meridians and parallels are complex curves, concave toward the central meridian and the nearest pole, respectively.
Poles: Points along the central meridian
Symmetry: About any straight meridian or the Equator
True along the central meridian or along two straight lines on the map equidistant from and parallel to the central meridian
Constant along any straight line on the map parallel to the central meridian. (These lines are only approximately straight for the projection of the ellipsoid.) Increases with distance from the central meridian Becomes infinite 90° from the central meridian
Conceptually projected onto a cylinder wrapped around the globe tangent to the central meridian or secant along two small circles equidistant from the central meridian
Cannot be geometrically (or perspectively) projected
Rhumb lines generally are not straight lines.
Many of the topographic and planimetric map quadrangles throughout the world at scales of 1:24,000 to 1:250,000
Basis for Universal Transverse Mercator (UTM) grid and projection
Basis for State Plane Coordinate System in U.S. States having predominantly north-south extent
Recommended for conformal mapping of regions having predominantly north-south extent
Presented by Johann Heinrich Lambert (1728–1777) of Alsace in 1772. Formulas for ellipsoidal use developed by Carl Friedrich Gauss of Germany in 1822 and by L. Kruger of Germany, L.P. Lee of New Zealand, and others in the 20th century.
Gauss Conformal (ellipsoidal form only)
Gauss-Kruger (ellipsoidal form only)
Transverse Cylindrical Orthomorphic
Description adapted from J.P. Snyder and P.M. Voxland, An Album of Map Projections, U.S. Geological Survey Professional Paper 1453. United States Government Printing Office: 1989.