Puerto Ricans, as U.S. citizens, are able to travel freely between Puerto Rico and the U.S. mainland. In the wake of Hurricane Maria, many of them sought refuge in Florida, New York and other parts of the U.S. Using anonymized cell phone location data for some 500,000 smart phones, data analysis firm Teralytics was able to map where Puerto Ricans moved from August 2017 to February 2018. CityLab has the maps and the story: “Between these months, nearly 6 percent of the Puerto Rican population left the island and is still living in the continental U.S. Another 6 percent left between October and September 2017 but returned to the island by February 2018.”
Datawrapper has added population cartograms to its map collections, and in its blog post discusses the advantages and disadvantages of cartograms vs. geographical maps, as well as the advantages and disadvantages of some of the different types of cartograms. Turns out that cartograms are kind of like map projections: each has its pros and cons; each is better suited to some uses than to others. [Caitlin Dempsey]
Maarten Lambrechts discusses how to make a dot density population map, in technical detail. He uses QGIS to process data for his home country of Belgium. The map above is one result (he also zoomed in on Brussels).
NASA’s Socioeconomic Data and Applications Center (SEDAC) has produced a population estimation service “for estimating population totals and related statistics within a user-defined region.” Basically, it provides a population estimate for an area drawn on a map. Available as data via map and GIS clients, it’s also accessible via a web app. I’ve noodled about with it; its population estimates are generally not insane. [Kottke]
One of the proposals in the new draft London Plan is to prohibit new fast food establishments within 400 metres of an existing school as a means of combatting childhood obesity.1 This is going over about as well as you’d think. Dan Cookson has mapped the locations of London’s fast food establishments and the 400-metre exclusion zones around each school; his map suggests a problem: there would be few places in the city able to host a new fast food joint.
It’s an even busier month than I thought for map book publishing. In addition to the eight books I told you about earlier this month, plus the two new editions of the Times Mini and Reference atlases, here are three more map-related books that were published this month:
- Atlas of Nebraska by J. Clark Archer et al. (Bison Books). “Far more than simply the geography of Nebraska, this atlas explores a myriad of subjects from Native Americans to settlement patterns, agricultural ventures to employment, and voting records to crime rates.” [Amazon]
- Bermuda Maps by Jonathan Land Evans (National Museum of Bermuda Press), a look at Bermuda’s cartographic history back to the 1600s. Available directly from the National Museum of Bermuda; I’m not sure where to get it off-island.
- Explorer’s Atlas: For the Incurably Curious by Piotr Wilkowiecki and Michał Gaszyński (HarperCollins UK). Illustrated large-format book full of factoids. There’s an accompanying wall map. Published in the U.K.; available elsewhere through resellers. [Amazon UK]
Update (30 Oct.): Jonathan Land Evans writes with information on overseas orders for his book, Bermuda Maps: “The most direct way by which people overseas may order copies is by e-mailing email@example.com, as the museum now uses The Bookmart bookstore in Bermuda for all order-fulfillment involving shipping to addresses outside Bermuda. The hardback book is a large one, handsomely illustrated in colour, and costs $65 plus postage.”
The Conversation has a piece on how indigenous peoples in the Amazon are using “counter-mapping” to reclaim not only their ancestral lands, but as a way to counter the colonial process of mapmaking itself.
Maps have always been part of the imposition of power over colonised peoples. While map-making might be thought of as “objective”, it is fundamentally political, a necessary part of controlling a territory. Maps inscribe borders, which are then used to include some and exclude others.
During a late 19th-century rubber boom, Amazonia became increasingly well mapped out as the young nations of Peru, Bolivia, Brazil and Colombia vied for territorial control. The rights and interests of Amazonian peoples were never included in this process and they would be continually denied rights, recognition and citizenship from these nations until the 1980s and 1990s. Even following legal recognition, their territorial rights—critical for their continued existence—are still often ignored in practice.
These marginalised people are now working together to reclaim the process of mapping itself. In the central Brazilian Amazon there has been a recent flurry of “counter-mapping”, used by forest peoples to contest the very state maps that initially failed to recognise their ancestral territorial rights.
Along with Regions and Seasons (previously), the Boston Public Library’s Leventhal Map Center is hosting another exhibition, Who We Are: Boston Immigration Then and Now, which runs until 26 August. “This exhibition compares the landscape of today’s ‘new’ Boston with that of over 100 years ago. The maps and graphics on display here show where Boston’s foreign-born residents originate from, and where newer immigrant groups have settled, while celebrating who we are, and the vibrant diversity that is Boston.” Text is in English, Spanish, Haitian Creole, Chinese and Vietnamese.
Statistics Canada released population and dwelling data from the 2016 Census yesterday. MountainMath’s CensusMapper project already has interactive maps based on that data: population change since 2011 (absolute and percentage), population density, and unoccupied dwellings—with presumably more to come, since the interface allows you to make your own census-derived maps.
Oxford geography professor Danny Dorling spoke at the TEDx Exeter conference in April 2016. If you’re familiar with Dorling’s work, it will come as no surprise that he makes extensive use of cartograms to describe the world’s population. Video: TED, YouTube.
Decades after German reunification, there are still stark differences between the former West and East Germany, and every so often those differences are explored and examined. Yesterday marked the 26th anniversary of reunification, for which the Washington Post saw fit to dust off and update a 2014 analysis. There are lots of maps, exploring everything from employment to flu vaccination to camper trailer ownership, but all but one date seem to be from that earlier version. This Post piece draws heavily on a 2014 article from Die Zeit (in English), which has even more interesting maps (with a rather funky design).
The number of same-sex marriages in the United States is not directly tracked. But a new Treasury Department research paper has been able to come up with a count of same-sex marriages by looking at jointly filed tax returns; the New York Times story is accompanied by a nice interactive map of such marriages by zip code. [MAPS-L]
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]