Several weeks ago, my paper on a novel square equal-area map projection was published in ACM Transactions on Spatial Algorithms and Systems, titled A Square Equal-Area Map Projection with Low Angular Distortion, Minimal Cusps, and Closed-Form Solutions. For mathematical details, the reader is directed to the paper, but I’ll discuss what motivated its development and outline the projection’s benefits here. The projection uses a quincuncial arrangement, which places the north pole at the center and splits the south pole between the four corners of the square, forming a quincunx pattern that resembles the “five” marking on a standard six-sided die. This arrangement has been previously used by the Peirce quincuncial projection, the Collignon quincuncial projection, and the Gringorten projection.1
Last month, I climbed Cerro Zapaleri, the 5648 m tall summit of which forms the tripoint of the borders of Chile, Argentina, and Bolivia.1 Its location is quite remote, ~105 km from San Pedro de Atacama, Chile and >40 km from the nearest paved road, both as the crow flies. After researching previous accounts of ascents and poring over high-resolution satellite imagery to map out routes to get to the mountain and to climb it, it was time to depart. As expected, a high-clearance four-wheel drive vehicle would prove to be necessary.