The Guyou hemisphere-in-a-square projection is a map projection used to project a hemisphere. It is conformal everywhere except for the four corners of each hemisphere's square. This projection, developed by Émile Guyou in 1887, can be considered an oblique aspect of the Peirce quincuncial projection, with which it has numerous similarities.
The imagery used for the map is a derivative of NASA's Blue Marble summer months composite, with oceans lightened to enhance legibility and contrast.Map: Strebe, using Geocart