Geocart menu class: Pseudocylindric
Meridians: Central meridian is a straight line half as long as the Equator. Other meridians are equally spaced parabolas intersecting at the poles and concave toward the central meridian.
Parallels: Unequally spaced straight parallel lines, farthest apart near the Equator; spacing changes very gradually. Perpendicular to the central meridian.
Symmetry: About the central meridian or the Equator
True along latitudes 36°46' N. and S. Constant along any given latitude; same for the latitude of opposite sign
Distortion is severe near outer meridians at high latitudes but somewhat less than that of the Sinusoidal projection. Can be substantially reduced by interruption. Free of distortion only at latitudes 36°46' N. and S. at the central meridian.
Thematic world maps in textbooks
Presented by John Evelyn Edmund Craster (1873-?) of England in 1929. Developed further by Charles H. Deetz and O.S. Adams in 1934
Oblique aspect used for map of Asia by National Geographic Society
Putnins P4, independently presented in Latvia in 1934.
Several pseudocylindricals, such as the Sinusoidal and the Boggs Eumorphic
Putnins P3 projection (1934) has meridians, poles, and Equator identical to those of the Craster, but parallels are equally spaced.
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.