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 ・mile Guyou in 1887, can be considered an oblique aspect of the Peirce quincuncial projection, with which it has numerous similarities. この中でhemisphere square projection conformal except develop consider oblique aspect quincuncial numerous similarity は外来語 英語の方がヤバイと思うんだけど