Cahill–Keyes projection

{{Short description|Polyhedral compromise map projection}}

File:Cahill-Keyes projection.jpg

File:Cahill-Keyes with Tissot's Indicatrices of Distortion.svg

File:World Map, Political, 2012, Cahill-Keyes Projection.jpg 2012 by Duncan Webb using Cahill–Keyes projection.]]

The Cahill–Keyes projection is a polyhedral compromise map projection first proposed by Gene Keyes in 1975. The projection is a refinement of an earlier 1909 projection by Bernard Cahill. The projection was designed to achieve a number of desirable characteristics, namely symmetry of component maps (octants), scalability allowing the map to continue to work well even at high resolution, uniformity of geocells, metric-based joining edges, minimized distortion compared to a globe, and an easily understood orientation to enhance general usability and teachability.{{cite web |url=https://lynceans.org/tag/cahill-keyes-world-map/ |title=Polyhedral Projections Improve the Accurately of Mapping the Earth on a 2D Surface |access-date=January 22, 2020 |last=Lobner |first=Peter |date=December 23, 2016 |publisher=The Lyncean Group of San Diego |location= |language= |quote= }}{{cite web |url=https://www.wired.com/2013/12/gene-keyes-quest-for-the-perfect-map/ |title=Get to Know a Projection: Gene Keyes' 40-Year Quest for the Perfect Map |access-date=January 22, 2020 |last=Stockton |first=Nick |date=December 9, 2013 |work=Wired |publisher=Condé Nast |location= |language= |quote= }}{{cite web |url=https://www.genekeyes.com/Redesigning-Cahill.html |title=Notes on Re-designing B.J.S. Cahill's Butterfly World Map |access-date=January 22, 2020 |last=Keyes |first=Gene |date=December 30, 2009 |publisher= |location= |language= |quote= }}