The Peirce quincuncial projection is a mapping of the surface of a sphere to
a square. It is a conformal mapping except for four points on the equator.
These points of non-conformality cause significant artifacts in photographic
applications. In this paper, we propose an algorithm and a user-interface to
mitigate these artifacts. We then promote the Peirce quincuncial projection as
a viable alternative to the stereographic projection in photographic
applications.
We propose a simplification of a key component in the Doomsday Algorithm for
calculating the day-of-the-week of any given date.