Parameters: Standard parallel
Geocart menu class: Pseudocylindric
Geocart family: Winkel
Equally spaced parallels
Neither conformal nor equal area
Meridians: Central meridian is a straight line 0.61 (or other value) as long as the Equator. Other meridians are equally spaced sinusoidal curves, concave toward the central meridian.
Parallels: Equally spaced straight parallel lines. Perpendicular to the central meridian.
Poles: Lines 0.61 (or other value) as long as the Equator
Symmetry: About the central meridian or the Equator
True along latitudes 50°28' N. and S. (or other chosen value)
Constant along any given latitude; same for the latitude of opposite sign
Not free of distortion at any point
Developed by Oswald Winkel (1873-1953) of Germany in 1914 as the average of the Sinusoidal and Equirectangular projection in both x and y coordinates. When the standard parallels of the Equirectangular projection are varied, the standard parallels and appearance of Winkel I vary. Use of latitudes 50°28' N. and S. results in a map at the correct total-area scale, but the local-area scale varies.
Eckert V, if the Equator is the standard parallel
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.