A data visualization by Gwilym Lockwood looks at where passengers get on and off the tube—it’s “a geographically accurate map of the London tube lines, sized by number of passengers getting on and off at each station.” Hovering over and clicking on each station reveals more data. [Maps Mania]
Here’s something neat from Garrett Dash Nelson: “the total seasonal snowfall in the continental US for 2017–2018 so far, shown as a relief map,” where total snowfall is expressed as elevation. That’s neat. Even neater: the animated gif that depicts it (a frame of which is above). Even neater than that: he shows how he made said animated gif.
Here’s an animated map showing each country’s average life expectancy at birth for every year since 1960, posted by Reddit user DataFreelancer to the Data Is Beautiful subreddit. [Boing Boing]
Most of these more common map types focus on a particular variable that is displayed. But what if you have multiple variables that you would like to present on a map at the same time?
Here is my attempt to collect examples of multivariate maps I’ve found and organize them into a loose categorization. Follow along, or dive into the references, to spur on your own investigations and inspirations!
Jim’s examples of maps that display more than one variable include 3D maps, multicolour choropleth maps, multiple small maps, and embedded charts and symbols. Useful and enlightening.
Ingo Günther’s World Processor project, which projects historical, political, social and environmental data visualizations onto literally hundreds of illuminated globes, gets a writeup in, of all places,
Will Geary’s TransitFlow project is an experimental set of tools to build animated transit flow visualizations, built from Transitland’s open-source transit schedule data. More than a dozen visualizations are available in video form here; each shows the flow of trains, buses and other forms of transport over the course of a day. Very high visual appeal. More at the Guardian. [Metrocosm]
Speaking of National Geographic. If the magazine is known for its cartography and its photography, one should not forget the illustrations, charts and infographics that accompany many of the articles and appear on the back of every folded map that comes several times a year with a magazine subscription. Now there’s a book of them: National Geographic Infographics. Edited by Julius Wiedemann and published by Taschen, the book “gather[s] the magazine’s best infographics of the past 128 years.” More at Atlas Obscura and Wired.
This interactive map shows the location of every single cargo ship over the course of 2012. Shipping routes (the Straits of Malacca look particularly bottlenecked) and materials shipped are available via the interface, and there’s a nice narrated tutorial explaining how the map works. Thanks to David Krathwohl for the tip. [Digg]
Sajjad Anwar and Sanjay Bhangar have been playing with train, station and schedule data from Indian Railways, one result of which (so far) is this reachability map—all the destinations reachable by a single train (i.e., without a transfer) from a given station. [Sajjad Anwar]
Previously: A Map of India’s Railway Network.
The Ordnance Survey has created a series of data visualizations showing the most popular walking and cycling routes, based on OS Maps usage. “The 500,000 plus routes were illustrated in a series of beautiful data visualisations by [cartographic designer] Charley [Glynn], who found it amazing that the people who created routes for their outdoors adventures had logged almost every bit of British coastline. It neatly frames the rest of the data and gives the illusion you are looking at a map of Great Britain. The darker, thicker areas illustrate the higher concentration of routes and reveal popularity.” Flickr gallery. [Mountain Bike Rider]
British housing market analyst Neal Hudson posted a map of 2015 average house prices in the U.K. to Twitter last week. London is unsurprisingly dire.
It's been a while since I've published a map so here's 2015 house prices by postcode across Britain pic.twitter.com/p5AexvYokS
— Neal Hudson (@resi_analyst) April 14, 2016
The Washington Post’s Christopher Ingraham compares two choropleth maps of U.S. population growth: while they look rather different, they use the same data. “The difference between my map and Pew’s—again, they both use the exact same data set—underscores a bit of a dirty little secret in data journalism: Visualizing data is as much an art as a science. And seemingly tiny design decisions—where to set a color threshold, how many thresholds to set, etc.—can radically alter how numbers are displayed and perceived by readers.” [Andy Woodruff]
(Worth mentioning that this is exactly the sort of thing dealt with in Mark Monmonier’s How to Lie with Maps.)
Coming next month from Policy Press, the third edition of People and Places: A 21st-Century Atlas of the U.K. by Danny Dorling and Bethan Thomas. The Independent has a long profile of the book, which makes extensive use of cartograms to illustrate data about the British population, and one of its co-authors, Oxford geography professor Danny Dorling. Pre-order at Amazon (direct Amazon U.K. link—it’s more likely to be in stock there). [via]