I think the Equal Earth projection is an excellent compromise. But as a cartography enthusiast, it pains me deeply every time someone talks about the “true” map, the “correct” map, or that the Mercator projection is “wrong.”
I will never stop loving this scene from the West Wing of the White House, but please don’t say that any map is right or wrong simply because of the projection it uses. We should just focus on saying that some projections are more or less suitable for different purposes, but we have to avoid sensationalism.
A new front has been opened in the never-ending war against the Mercator projection. The African Union endorsesCorrect the Map’s campaign to replace the Mercator projection (which diminishes the relative size of Africa) with the Equal Earth projection. I think it’s awfully interesting that they’re proposing Equal Earth instead of the Peters map: Equal Earth is a better choice for maps of the world than the Peters or the Mercator, but then so are dozens of other projections. That the campaign against the Mercator is no longer necessarily a campaign for the Peters is something to take note of. [Andrew Middleton]
Though I’m still wrapping my head around the idea that campaigning against the Mercator is still a thing. Really, still? After all, it’s been decades since the Mercator was the dominant projection on wall maps. A quick look at the catalogues of Stanfords and World of Maps suggests maybe one in ten wall maps of the world use the Mercator, and the ones that do seem to be second-tier publications at best (because it’s been known for a long time that the Mercator is shit at being a world map). I guess the Mercator is too good a metaphor for colonialism and foreign domination to let go of it.
But then I have no idea which maps are used in classrooms, in Africa or anywhere else. And I’m often surprised at how much Mercator I see in online maps and infographics, because the tools they use default to Web Mercator. Web Mercator is perfectly fine—at large scales. Most online map providers use Web Mercator at all zoom levels (Apple Maps zooms out to a globe on Apple Silicon but not on older Intel Macs, Google offers globe view as an option on desktop). Web Mercator shows up a lot where an alternative would’ve been better. So it’s not like there isn’t a point here.
First off, it was fun and interesting for me to think about how projections can be glued together. This map is a Frankenstein’s Monster–like creation, but it doesn’t leave anything out, nor does it have mismatches at the joints. Landmasses fit together seamlessly at the boundaries of any given transition zone between projections, because with a little math and the right tools, you can make two projections (of the right variety) match each other at a given location.
The other goal is to educate, through entertainment. It looks funny, thus drawing attention; and in doing so I hope it will jar people into realizing how distorted all projections are. This projection is just as valid as any other, in terms of how faithfully it represents the earth. It’s equal-area, showing everything in proper size proportion. It has interruptions, sure, but so do many others. It is a composite, yes, but so are other projections.
I think it’s in the same vein as those “south-up” world maps that you can buy, or ones centered on the Pacific. Many audiences would find them unfamiliar, but the maps use their uniqueness to make people realize that there’s really no right way to portray the world, and that our conventions are frequently arbitrary.
It’s available for free download at pretty high resolution, or you can buy it as a print, and while Daniel doesn’t actually expect anyone to do it, honestly, why not?
Randall Munroe, “Greenland Size”, xkcd, 25 March 2024.
The 25 March 2024 xkcd honours Greenland’s place as a measure of cartographic distortion. It’s also, unexpectedly, a riff on the idea of the 1:1 scale map (cf. Borges), especially if you consult the comic’s alt text: “The Mercator projection drastically distorts the size of almost every area of land except a small ring around the North and South Poles.”
I’ve been struggling for months now on how to deal with Arno Peters and his world map. Every time I turn to the subject, I just get bogged down by the complexity of the scattered and multifaceted literature, by the insanity of much of Peters’ map work, and by the different responses to his work. […] After at least three tries to say something new, and floundering each time, I am presenting this blog entry simply as an attempt to organize the information about Peters in a way that makes sense to me, which is to say historically. Think of it as a long bibliographical essay based on what I have to hand (so not comprehensive, especially in the German-language literature). I’m not sure that it says anything necessarily new or significant. So please join me as I go through a series of cuts at Peters and his map work.
Daniel Huffman’s map projection trading cards are making a comeback. “While 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’ve had many people contact me asking and hoping to get their hands on a pack or two. So, I am bringing them back for one final print runvia Kickstarter,” writes Huffman. “I hope you’ll share this widely, so that we don’t miss anyone this time around, as this is almost certainly the last time these cards will be printed.”
The latest in Randall Munroe’s Bad Map Projection series on xkcd is perhaps his most evil yet: it turns all longitudes positive—i.e., it turns west longitude into east longitude, putting Quebec somewhere in Kazakhstan and the Panama Canal off Sri Lanka.
I first learned about a couple of these connections several years ago. I don’t 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’s 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.
The diagram is digital-only (PDF) and donationware.
A couple months back, I floated an idea for making some fun trading cards based on map projections. I’m very happy to report that several dozen of you responded and contributed designs to help make the set happen. I’ve been spending several weeks on managing everyone and working through logistics, and I’m pleased to now be able to offer a pre-order of The Projection Collection.
The cards can be pre-ordered here, with delivery later this year (or pickup at NACIS). Each pack has 16 cards, with complete sets not available by design—these are meant to be trading cards in the classic sense. Pre-orders will close on July 6, so you have until then.
To follow-up on xkcd’s Madagascator cartoon (previously), I missed the fact that clicking on the cartoon at the xkcd website actually did something, but Keir caught it: it links to Drew Roos’s Mercator: Extreme, an online tool that allows you to have some fun with the Mercator projection’s excessive polar distortion by making any point on the planet the North Pole and which clearly served as Randall’s inspiration.
Uncharacteristically for xkcd’s Bad Map Projection series, the Madagascator is actually totally legitimate as a projection. Not that it’s any less mischievous, mind.
Update, 3 May: Turns out there was more to this xkcd cartoon. See Mercator: Extreme.
Randall Munroe’s map projection humour is increasingly on point, as last Friday’s xkcd demonstrates. (The mouseover text is even better: “There are two rules on this ship: Never gaze back into the projection abyss, and never touch the red button labeled DYMAXION.”)
Stefan Reifenberg’s 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]
The Spilhaus projection has been available to ArcGIS Pro users for nearly two years. Now, to expand the Spilhaus’s availability beyond ArcGIS users, John Nelson provides vector assets suitable for designers working in, say, Illustrator.
The Spilhaus projection has been available to ArcGIS Pro users for nearly two years. Now, to expand the Spilhaus’s availability beyond ArcGIS users,