Description
Cylindric projection with Mercator-like appearance but reduced high-latitude excesses.
Classifications
cylindric
compromise
Graticule
Meridians: Straight, evenly spaced, 83.8% the length of the parallels.
Parallels: Straight, with spacing increasing from the equator.
Scale
Scale is correct along the 10°N/S parallels and constant along all parallels.
Distortion
Free of distortion nowhere. The map’s distortion is predominately in the form of areal inflation except in the low distortion band in the tropics, where angular deformation is greater.
Origin
By A.S. Karchenko, revised by A.I. Shabanova, 1951–1952, based on the work by Urmayev that forces a chosen scale factor along three different parallels.