Linked from
The 46 pages that link to Map projection, each with the reason it gives.
Mercator projectionNarrower topic: The Mercator projection is one specific way to flatten the globe.
Web mappingNarrower topic: Every flat web map must project geographic coordinates onto its display.
Arno PetersNarrower topic: Peters’s proposal belongs to the broader problem of flattening Earth.
Oronce FineNarrower topic: Fine’s world maps depended on translating spherical geography onto paper.