The Guyou hemisphere-in-a-square projection is a conformal map projection for the hemisphere (except for the four angles of the square where the conformality fails). It is an oblique aspect of the Peirce quincuncial projection. When it is used to represent the entire sphere it is known as the Guyou doubly periodic projection (see also doubly periodic function).
Read more about Guyou Hemisphere-in-a-square Projection: History, Formal Description, Properties, Related Projections
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“Those who speak of our culture as dead or dying have a quarrel with life, and I think they cannot understand its terms, but must endlessly repeat the projection of their own desires.”
—Muriel Rukeyser (1913–1980)