{"id":1810762,"date":"2022-12-22T16:50:33","date_gmt":"2022-12-22T21:50:33","guid":{"rendered":"https:\/\/www.maproomblog.com\/?p=1810762"},"modified":"2022-12-22T16:50:33","modified_gmt":"2022-12-22T21:50:33","slug":"projection-connections-a-genealogy-of-map-projections","status":"publish","type":"post","link":"https:\/\/www.maproomblog.com\/2022\/12\/projection-connections-a-genealogy-of-map-projections\/","title":{"rendered":"Projection Connections: A Genealogy of Map Projections"},"content":{"rendered":"
\"Projection<\/a>
Daniel Huffman<\/figcaption><\/figure>\n

Fresh off of producing a (now sold-out) line of map projection trading cards<\/a>, Daniel Huffman has produced a 16\u00d724-inch poster showing the surprisingly close and entangled relationships between the various map projections<\/a>.<\/p>\n

I first learned about a couple of these connections several years ago. I don\u2019t quite remember how or where, but I found out that the Mercator projection was equivalent to a Lambert Conformal Conic with the standard parallels set opposite each other across the Equator. And that if you moved both those parallels up to a pole, you got a Stereographic. My mind was suitably blown, and I saved it as a fun fact to share with people. This year, while working on The Projection Collection, I spent a lot of time on daan Strebe\u2019s site looking up details, and I often saw his notes (usually derived from Snyder\/Voxland) about how projections were related to each other. I started to realize there were a lot of these connections out there, and I thought it might be fun to diagram them in some way.<\/p><\/blockquote>\n

The diagram is digital-only (PDF) and donationware.<\/p>\n","protected":false},"excerpt":{"rendered":"

Fresh off of producing a (now sold-out) line of map projection trading cards, Daniel Huffman has produced a 16\u00d724-inch poster showing the surprisingly close and entangled relationships between the various map projections. I first learned… More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"link","meta":{"autoblue_enabled":true,"autoblue_custom_message":"","autoblue_shares":[],"autoblue_post_url":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[29],"tags":[571],"class_list":["post-1810762","post","type-post","status-publish","format-link","hentry","category-cartography","tag-map-projections","post_format-post-format-link"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":1807896,"url":"https:\/\/www.maproomblog.com\/2022\/06\/map-projection-trading-cards\/","url_meta":{"origin":1810762,"position":0},"title":"Map Projection Trading Cards","author":"Jonathan Crowe","date":"30 June 2022","format":"link","excerpt":"Daniel Huffman\u2019s map projection trading cards are now a thing you can order. Daniel, earlier this month: A couple months back, I floated an idea for making some fun trading cards based on map projections. I\u2019m very happy to report that several dozen of you responded and contributed designs to\u2026","rel":"","context":"In "Memorabilia"","block_context":{"text":"Memorabilia","link":"https:\/\/www.maproomblog.com\/category\/memorabilia\/"},"img":{"alt_text":"The Projection Collection (Daniel Huffman)","src":"https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2022\/06\/huffman-map-projection-trading-cards-1024x514.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2022\/06\/huffman-map-projection-trading-cards-1024x514.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2022\/06\/huffman-map-projection-trading-cards-1024x514.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2022\/06\/huffman-map-projection-trading-cards-1024x514.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":1818807,"url":"https:\/\/www.maproomblog.com\/2023\/09\/the-return-of-the-map-projection-trading-cards\/","url_meta":{"origin":1810762,"position":1},"title":"The Return of the Map Projection Trading Cards","author":"Jonathan Crowe","date":"27 September 2023","format":"link","excerpt":"Daniel Huffman\u2019s map projection trading cards are making a comeback. \u201cWhile my colleagues and I did our best to let everyone know about these cards, some people inevitably missed out during the first print run. I\u2019ve had many people contact me asking and hoping to get their hands on a\u2026","rel":"","context":"In "Memorabilia"","block_context":{"text":"Memorabilia","link":"https:\/\/www.maproomblog.com\/category\/memorabilia\/"},"img":{"alt_text":"Map projection trading cards (Daniel Huffman)","src":"https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2022\/06\/huffman-map-projection-trading-cards-1024x514.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2022\/06\/huffman-map-projection-trading-cards-1024x514.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2022\/06\/huffman-map-projection-trading-cards-1024x514.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2022\/06\/huffman-map-projection-trading-cards-1024x514.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":1839289,"url":"https:\/\/www.maproomblog.com\/2025\/04\/daniel-huffmans-asymmetric-monstrosity\/","url_meta":{"origin":1810762,"position":2},"title":"Daniel Huffman’s Asymmetric Monstrosity","author":"Jonathan Crowe","date":"10 April 2025","format":"link","excerpt":"Daniel Huffman Foreshadowed on Mastodon in January, the horror that Daniel Huffman has created is now upon us. Behold the Asymmetric Monstrosity projection, an equal-area\u2014yes! every part of it\u2014projection that grafts together pieces of the Equal Earth, cylindrical equal-area, three pieces of Mollweide and five sinusoidals (each on different central\u2026","rel":"","context":"In "Cartography"","block_context":{"text":"Cartography","link":"https:\/\/www.maproomblog.com\/category\/cartography\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2025\/04\/huffman-asymmetric-monstrosity.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2025\/04\/huffman-asymmetric-monstrosity.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2025\/04\/huffman-asymmetric-monstrosity.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2025\/04\/huffman-asymmetric-monstrosity.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2025\/04\/huffman-asymmetric-monstrosity.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2025\/04\/huffman-asymmetric-monstrosity.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":1789121,"url":"https:\/\/www.maproomblog.com\/2020\/08\/comparing-map-projections\/","url_meta":{"origin":1810762,"position":3},"title":"Comparing Map Projections","author":"Jonathan Crowe","date":"17 August 2020","format":"link","excerpt":"Kai\u2019s Comparing Map Projections mashes up two code blocks by Mike Bostock: Map Projections Distortions is a visualization of the types of distortion inherent to each projection; Projection Transitions morphs between projections. Combining the two is a neat trick. Refreshing to see the usual two combatants excluded. [Maps Mania]","rel":"","context":"In "Cartography"","block_context":{"text":"Cartography","link":"https:\/\/www.maproomblog.com\/category\/cartography\/"},"img":{"alt_text":"Comparing Map Projections (screenshot)","src":"https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2020\/08\/comparing-map-projections-1024x828.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2020\/08\/comparing-map-projections-1024x828.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2020\/08\/comparing-map-projections-1024x828.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.maproomblog.com\/xq\/wp-content\/uploads\/2020\/08\/comparing-map-projections-1024x828.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":1805841,"url":"https:\/\/www.maproomblog.com\/2022\/01\/map-projection-explorer\/","url_meta":{"origin":1810762,"position":4},"title":"Map Projection Explorer","author":"Jonathan Crowe","date":"6 January 2022","format":"link","excerpt":"Stefan Reifenberg\u2019s Map Projection Explorer is another interactive tool that morphs a world map into the projection of your choice. The availability of data from the d3.js library seems to be enabling a lot of them. [r\/Maps] Previously: Map Projection Playground; Comparing Map Projections.","rel":"","context":"In "Cartography"","block_context":{"text":"Cartography","link":"https:\/\/www.maproomblog.com\/category\/cartography\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1809903,"url":"https:\/\/www.maproomblog.com\/2022\/11\/will-using-fullers-projection-get-you-in-trouble\/","url_meta":{"origin":1810762,"position":5},"title":"Will Using Fuller’s Projection Get You in Trouble?","author":"Jonathan Crowe","date":"17 November 2022","format":"link","excerpt":"Buckminster Fuller\u2019s Dymaxion map: is the projection it uses patented, trademarked or copyrighted to the extent that you have to pay a licencing fee or face a lawsuit? Daniel Huffman digs into this very question, which apparently has been circulating around the cartographic world for some time. \u201cHere\u2019s the summary\u2026","rel":"","context":"In "Cartography"","block_context":{"text":"Cartography","link":"https:\/\/www.maproomblog.com\/category\/cartography\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/posts\/1810762","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/comments?post=1810762"}],"version-history":[{"count":2,"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/posts\/1810762\/revisions"}],"predecessor-version":[{"id":1810765,"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/posts\/1810762\/revisions\/1810765"}],"wp:attachment":[{"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/media?parent=1810762"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/categories?post=1810762"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.maproomblog.com\/wp-json\/wp\/v2\/tags?post=1810762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}