The 74 on Boston Schools and the Peters Map

Education news website The 74 has its own coverage of the Boston schools/Peters map controversy (is it safe to call it a controversy?), with extensive quotes from Matthew Edney, who does not mince words. (Comparing both projections to Comic Sans? Ouch.) [Caitlin Dempsey]

Previously: More on Boston Schools and the Peters MapThe Peters Map Is Fighting the Last WarThe Peters Projection Comes to Boston’s Public SchoolsIn Defence of the Mercator ProjectionHow the Mercator Projection Won the Internet.

Maps and the Geospatial Revolution

In late 2010 and early 2011, the Geospatial Revolution Project explored the use and impact of digital mapping through multimedia educational materials and a series of web videos. An associated online course, “Maps and the Geospatial Revolution,” launched in 2013 as a MOOC (massive open online course) via Coursera; more than 100,000 students signed up for it. Now, with changes to Coursera’s model, the instructor, Anthony C. Robinson, has made the course materials freely available for self-directed study. [GIS Lounge]

More on Boston Schools and the Peters Map

Atlas Obscura’s Cara Giaimo has an in-depth look at the reaction to the decision by Boston public schools to adopt the Peters projection in teaching materials. It’s well worth taking the time to read; the general gist from several cartographers and commentators is that swapping the Mercator for the Peters isn’t that much of an improvement. Though it includes comments from yours truly (I was in touch for this article), Giaimo talks to people who actually do know what they’re talking about, including Mark Monmonier (who, again, literally wrote the book on the Mercator projection) and Matthew Edney (who spoke to WZON 3 about this topic earlier).

Joshua Stevens, NASA’s data visualization and cartography lead:

Also on Twitter, and to emphasize how long this has been going on, Jeremy Crampton notes his 1994 paper, “Cartography’s Defining Moment: The Peters Projection Controversy, 1974–1990.” A sequel may be required.

Previously: The Peters Map Is Fighting the Last WarThe Peters Projection Comes to Boston’s Public SchoolsIn Defence of the Mercator ProjectionHow the Mercator Projection Won the Internet.

The Peters Map Is Fighting the Last War

News of Boston public schools’ decision to go with the Peters projection has gone viral over the past week, and my teeth have not stopped itching. Largely because this is very much old news: Arno Peters began promoting “his” projection 44 years ago, and the Peters map has been making the rounds in certain circles ever since then. This is not new, and the media is showing its feckless streak in its lack of awareness of that fact. After all, the West Wing episode with the Peters map in it was broadcast 16 years ago.

The Gall-Peters projection is just one of several rectilinear equal-area projections; that Peters promoted it as a tool of social justice and anti-colonialism made it awfully appealing to people who are concerned with such issues. (They are not wrong to be concerned with such issues.) But cartographers have generally always been appalled by the projection, by Peters’s rhetoric and by his general ignorance of what had gone before. (Peters’s map had already been described by James Gall in 1885; the Mercator projection’s insufficiencies as a wall map had long been known; and there were many other projections, from the Van der Grinten to the Mollweide to the Goode homolosine, that were already being used in the Mercator’s stead.)

(The Mercator projection, for its part, makes a crap wall map: its virtue is that rhumb lines—compass headings—are straight lines, making the Mercator ideal for navigation. It’s worth emphasizing that Mercator himself died in 1594. Again, see Monmonier’s book on the subject.)

Cartographers’ response to the Peters projection is essentially, usually (and correctly) that every map projection is a compromise, because every map projection is an attempt to represent a round planet on a flat surface. All maps, in other words, lie; or at least no map is exempt from lying; or at least the Mercator is no more a liar than any other projection. It’s essentially an effort in debunking—the tedious repetition of “well, actually” to a credulous audience that doesn’t care enough to listen all the way through. (And besides: the company selling the Peters map thoroughly agrees with them!)

For the latest examples of this, see Caitlin Dempsey’s piece on teaching context, and Andy Woodruff’s response to the latest round of this. They’re good pieces, worth reading—but I can’t help wonder whether something different needs to be tried. But then again: what problem are we trying to solve? Media and public credulity? The fact that the Peters projection, bluntly, sucks? The campaign—and it is a campaign—behind it?

But the campaign for the Peters map is increasingly irrelevant. In late 2015 I argued that the debate over the right projection for wall maps was the cartographic equivalent of fighting the last war. The Peters map was a 20th-century response to a 19th-century problem (the Mercator on wall maps) that had already largely been solved earlier in the century. Sure, there are still wall maps out there that use the projection (I’m looking in your direction, IKEA), but by and large it’s not used nearly as much as the Peters defenders would have you think.

But 21st-century mapmaking is not about wall maps: it’s about web maps. As I said in 2015:

Every online map service uses a variant of the Mercator projection called Web Mercator. Whatever its shortcomings—and there are many, owing to the fact that its calculations use a spherical Mercator model to save computational cycles—Web Mercator has become the de facto standard. And the size distortions at small scales that have made the Mercator projection the target of so much ire over the decades are simply moot for most use cases.

In many ways the past debates over the Mercator are moot: arguing over the right projection for wall-sized world maps—Mercator vs. Peters vs. Robinson—is fighting the last war. Mercator has become the default option for online mapmaking, simply because so many data visualization maps rely on Google Maps or OpenStreetMap for their base map layer. Other projections will be reserved for the professionals, people with access to more sophisticated mapmaking tools and the skill to use them, but for the most part, when data is mapped on the Internet, it’ll be mapped according to Mercator.

Zoom out in Google Maps or OpenStreetMap, and what do you see? The Mercator projection, with Greenland in all its inappropriately giant glory. (Apple Maps turns into a globe when you zoom out far enough, but Apple Maps are app-only.) The reason why this isn’t generally seen as a problem is that hardly anyone uses Google Maps as a world map: like topographic maps that use UTM, at close range Mercator works just fine.

While there are efforts under way to use other projections in web maps, it’s unlikely that the Mercator-vs.-Peters battle—a false dichotomy if there ever was one—will migrate to the digital arena.

Previously: The Peters Projection Comes to Boston’s Public SchoolsIn Defence of the Mercator ProjectionHow the Mercator Projection Won the Internet.

The Peters Projection Comes to Boston’s Public Schools

Gall-Peters projection (Wikimedia Commons)

In a development that just might make academic cartographers pull out their remaining hair in frustration, Boston’s public schools began using the Peters projection in social studies classes last week. The news coverage (see the Grauniad’s) is the usual straw man argument about the Mercator and the false dichotomy between it and the Peters, as though no other map projections have ever been used. (National Geographic has been using other projections since the 1920s, and currently uses the Winkel tripel. The last time I was at a map store, hardly any of the world maps for sale used the Mercator. See Mark Monmonier’s Rhumb Lines and Map Wars: A Social History of the Mercator Projection, which I reviewed in 2008.)

Maclean’s Profiles Nova Scotia’s COGS

Nova Scotia Community College’s Centre of Geographic Sciences, a tiny, 200-student campus in Lawrencetown, Nova Scotia, gets two writeups in Canada’s national newsmagazine, Maclean’s, as part of its annual campus guide: its unique marine geomatics program is profiled here, and the W. K. Morrison Special Collection, which I told you about last June, is profiled here.

Miscellaneous Globes

Random and miscellaneous globe items:

Roy Frederic Heinrich, "James Wilson, the Vermont globe-maker, Bradford, Vermont, 1810." Library of Congress.
Roy Frederic Heinrich, illustration of James Wilson, n.d. Library of Congress.

James Wilson was America’s first globe maker; his Bradford, Vermont-based globe factory opened in 1813. Geolounge points to the above illustration of Wilson, undated but from the early 20th century, by Roy Frederic Heinrich.

Dennis Townsend, "Townsend's Patent Folding Globe," 1869. Norman B. Leventhal Map Center.
Dennis Townsend, “Townsend’s Patent Folding Globe,” 1869. Norman B. Leventhal Map Center.

The Norman B. Leventhal Map Center: “Dennis Townsend, a Vermont schoolteacher, created this collapsible, portable, and inexpensive paper globe for students as an alternative to the large, more expensive globes available mainly in schools and libraries.”

In my post about old British films about globemaking I said, “These films fascinate me because they describe a kind of globemaking—layers of plaster, paper globe gores, and varnish—that I don’t think happens any more.” On The Map Room’s Facebook page, a commenter replied that Lander and May use the same methods today. Handmade by Chris Adams, these artisanal globes appear to be closer in class and price to Bellerby than to Replogle.

Finally, via the Washington Map Society’s Facebook page, news that a book about 17th- and 18th-century cartographer and globemaker Vincenzo Coronelli, Marica Milanesi’s Vincenzo Coronell Cosmographer, 1650-1718, is now available, though apparently not easily.

The Map That Came to Life


As part of National Map Reading Week, the British Library’s map blog points to at least one example of how map reading used to be taught.

One of the most celebrated 20th century children’s map reading guides is showcased in our forthcoming exhibition Maps and the 20th Century: Drawing the Line. Published in 1948, Ronald Lampitt and James Deverson’s The Map that Came to Life follows the story of John and Joanna who use an Ordnance Survey map to walk to town. As they pass over fields, past houses and along footpaths, their surroundings are compared with map adjacent on the same page. The fields turn into contoured blank spaces, houses become black cubes, footpaths dashed lines. Map literacy is acquired by the reader as they accompany the children on their virtual journey, matching map with reality.

In The Map that Came to Life the map is portrayed as an objective, precise and above all truthful mirror of nature. And this inherent trustworthiness enabled maps to become important features of the lives of successive generations of people.

The idea that maps are objective and truthful is not something that would fly today, I think, but in the context of entry-level map education, which in Britain always seems to be specifically in terms of how to read an Ordnance Survey map, rather than maps in general, it seems harmless enough.

A complete scan of the book is available on this website. Back in 2008, Philip Wilkinson talked about the book on the English Buildings blog.

Ultimate Mapping Guide for Kids

ultimate-mapping-guideA book I was not previously aware of: Justin Miles’s Ultimate Mapping Guide for Kids. The British edition came out from QED Publishing last May, the North American edition from Firefly Books in August. “Readers will learn how to understand map symbols and legend, navigate without a compass, create their own maps, plan their own map-reading expedition, and even how to use their mapping skills on a geocaching adventure.”

Related: Map Books of 2016.

Ordnance Survey Announces National Map Reading Week

nmrwThe Ordnance Survey is launching a National Map Reading Week, to be held 17-23 October 2016, aimed at improving people’s map-reading skills. The OS cites evidence that a surprising number of people in the U.K. do poorly at maps and geography:

People were asked to plot various locations, from cities to National Parks on an outline map of Britain and we were pretty surprised at the results. Some 40% of people struggled to pinpoint London and only 14% could accurately plot Edinburgh’s location. […]

Even more worrying to us, just 40% of those surveyed felt they could confidently read a map with 10% never having used a paper map.

Now, map literacy and geographical knowledge aren’t the same thing: you can know how to read a map without being any good at placing something on a blank map (at least in theory). Either way, the Ordnance Survey will be producing guides and hosting workshops during the week in question. (In the meantime, they point to these map reading guides.)

As a major publisher of maps, it’s in their interest to do this sort of thing—a map-reading public is a map-buying public, after all—but increasing map literacy is an unquestionably good thing.