Bothered by the widespread use of Web Mercator by Canadian news outlets to show last week’s election results, Kenneth Field has posted an article that aims to address the problem. Static maps of Canada tend to use a conic projection like the Albers or the Lambert, and that’s the case for print election maps as well. Online interactive maps, on the other hand, use off-the-shelf tools that use Web Mercator, which results in the sparsely populated territories looking even more enormous. But that doesn’t have to be the case, says Ken, who shows us, with a few examples, how use ArcGIS Pro to create interactive maps using a conical projection.
Meanwhile, Mark Gargul writes in response to Ken’s critique of his cartogram of the election results. Mark describes himself as an amateur and readily admits that other cartograms are “clearly more aesthetically pleasing. On the other hand, I was going for something different with my cartogram—specifically, to try to preserve riding-adjacency as much as possible.”
@kennethfield … On the other hand, what I was going for was preserving, to the extent possible, riding adjacency. If Markham-Stouffville shared a border with Markham-Unionville on a real map, I wanted that border on the cartogram. Hence, the ugliness.
The other thing Mark was going for in his cartogram was to indicate the urban-rural split: metropolitan areas are given a black border: it’s easy to see which ridings are in Montreal or Toronto; seats that are partially urban and partially rural straddle those borders.
I'll summarize for you guys what I let Ken know in more detail: I wasn't going for pretty, but I was going for illustrating the rural-urban split, which doesn't come across well in the other cartograms or maps I have seen
Speaking of the Mercator. Maps Mania’s roundup of Canadian election results maps notes that the Canadian media’s interactive maps (e.g. CBC, Global, Globe and Mail) invariably resorted to Web Mercator, largely because of the mapping platform used. (In-house infographics team? Don’t be ridiculous.) Web Mercator is singularly bad for Canadian election maps, because Nunavut: it’s the largest electoral district by area (1.9 million km2) and the smallest by population (31,906). It’s enough of a distortion on the Lambert: Mercator makes it worse.
As for cartograms, Ken hated the one I posted last night; Keir points to Luke Andrews’s Electoral Cartogram of Canada, which is a bit nicer, and uses only one hexagon per riding instead of seven. Keir also points to this animation that shifts between a geographical map and a cartogram. It’s hard to recognize Canada in cartograms, because it’s difficult for us to grasp just how many people live in southern Ontario.
This cartogram shows the seat-by-seat results of the federal election held last Monday in Canada. It was uploaded to Wikipedia by user Mark Gargul to illustrate the 2019 Canadian federal election article, and it’s a welcome departure from the usual election results maps in this country.
Canadian election results maps generally use geographic maps, usually the Lambert conformal conic projection that most maps of Canada use (though sometimes it’s the Mercator!) rather than cartograms. Which means that Canadian maps suffer from the same “empty land doesn’t vote” problem that U.S. maps have, though it’s mitigated by the fact that vast rural and northern seats are often won by different parties: you don’t have the same sea of one colour that you get in the States.
That said, Canada is overwhelmingly urban, and so are its electoral districts. Most election results maps resort to using multiple inset maps to show the urban results. (Elections Canada’s map has 29 of them.) Gargul’s cartogram sidesteps both problems neatly; on the other hand, it’s next to impossible to find your own damn constituency (it’s hidden in the mouseover text). If the disadvantage of empty-land election results maps is that the colours aren’t representative, their advantage is that you can tell what regions voted for whom, at least if you know your geography.
So Trump is a serial map-abuser. These three examples clearly show how he uses the map for dominance and to assert his apparent power and possession. This is Trump’s America. He’s simply the latest in a very long line of leaders, politicians, dictators and many others to use maps to try and illustrate a version of the truth that has been cartographically mediated to suit a partisan purpose. Like I said, it’s not wrong to use maps to tell a certain story (apart from when the facts are clearly manipulated which is stretching truth to the realms of plain lies) but it is a case of “reader, beware.”
Die Zeit looks at European voting patterns in the runup to this weekend’s European elections: the interactive map categorizes each national political party on a spectrum from extreme left to extreme right and maps which political category received the most votes on a regional basis. “What immediately becomes clear: Europe is a colorful place. From leftist-socialist to far right-nationalist, the Continent is home to an extremely broad political spectrum—and every political creed is in the majority somewhere.” The map is also available in the original German.
The Atlantic maps political polarization in America. “The result was surprising in several ways. First, while virtually all Americans have been exposed to hyper-partisan politicians, social-media echo chambers, and clickbait headlines, we found significant variations in Americans’ political ill will from place to place, regardless of party.” Includes an interactive map with county-level data based on polling and analytics.
The print edition of today’s Washington Postmaps the fences and walls along the U.S.-Mexico border. The online version, which I seem to have missed when it was posted in October, offers a much more detailed look: it’s an interactive, scrollable map that offers a flyover view of the border, fenced and unfenced, as it passes through farms, ranches, towns and impossibly rugged terrain between the Pacific and the Gulf of Mexico.
In April amateur cartographer Philip Kearney created “United States of Apathy,” a map that imagined the 2016 U.S. presidential election results if nonvoters were counted as a vote for “nobody,” in which case “nobody” would have won the electoral college by a landslide. Esri cartographer Jim Herries recently collaborated with Kearney on an interactive version that explores the phenomenon of apathetic voters in more depth. [CityLab]
The web comic xkcd has done maps before (and I’ve covered most of them) but Friday’s iteration was a departure all the same: an interactive map of the challengers in the 2018 U.S. midterm elections: the larger the candidate’s name, the more significant the office and the better their odds of winning. Remember, these are only the challengers: no incumbents are listed.
Bloomberg maps what political ads are talking about in 210 local television markets, and finds some intriguing patterns in terms of what each party chooses to focus on in each local market. [Nathaniel Rakich]
There’s a lot of stuff relevant to our interests on the website of the University of Richmond’s Digital Scholarship Lab, and it’s hard to know what to begin with. One of the more recent projects, which CityLab saw fit to link to yesterday, is an interactive map showing elections to the U.S. House of Representatives from 1840 to 2016. It’s the kind of project that the user can get very, very lost in. In addition to the usual map of U.S. congressional districts, the site can also visualize the districts as a dot map to minimize the empty-land-doesn’t-vote problem (they call it a cartogram: it isn’t). There’s also a timeline showing the overall results over time at a glance; selecting a district gives shows how the district voted in past contests as a line graph. In other words: quite a lot of data, economically presented.