In 2016 I told you about Michael Plichta’s first globe, a delightfully retro hand-crafted globe of Mars based on Percival Lowell’s maps that showed the world covered in canals. Plichta’s second globe project is also cool and unusual, but in a completely different way: it’s a relief globe of the Moon. No globe gores were used to make this 30-cm globe: the textured surface is cast in artificial plaster and then painted by hand, a compulsively exacting process laid out in this short video:
Hand-crafted globes are never inexpensive, and though Michael never mentions prices, this one cannot be either. (I’ve seen his Mars globe listed for $1,850.) That said, this is a definite lust object. I desperately want one.
Diagrams of Power, a group exhibition taking place right now at OCAD University’s Onsite Gallery in Toronto, “showcases art and design works using data, diagrams, maps and visualizations as ways of challenging dominant narratives and supporting the resilience of marginalized communities.” Curated by Patricio Dávila, it runs until 29 September. Free admission.
It’s 2018. The 2016 U.S. presidential election is nearly two years in the past. But that didn’t stop the New York Times from unleashing a new map of the 2016 election results earlier this week. On the surface it’s a basic choropleth map: nothing new on that front. But this map drills down a bit further: showing the results by precinct, not just by county. The accompanying article sets out what the Times is trying to accomplish: “On the neighborhood level, many of us really do live in an electoral bubble, this map shows: More than one in five voters lived in a precinct where 80 percent of the two-party vote went to Mr. Trump or Mrs. Clinton. But the map also reveals surprising diversity.”
Kenneth Field has some objections to the map. “So you have smaller geographical areas. Detailed, yes. Accurate, certainly. Useful? Absolutely not because of the way the map was made.” It’s a choropleth map that doesn’t account for population: “An area that has 100 voters and 90 of them voted Republican is shown as dark red and a 90% share. Exactly the same symbol would be used for an area that has 100,000 voters, 90,000 of whom voted Republican.” It gets worse when that thinly populated precinct is geographically larger. (Not only that: the map uses Web Mercator—it is built with Mapbox—so Alaska is severely exaggerated at small scales.) There are, Ken says, other maps that account for population density (not least of which his own dot density map).
The Times map has a very specific purpose, and Ken is going after it for reasons that aren’t really relevant to that purpose. The map is aimed at people looking at their own and surrounding neighbourhoods: the differences in area and population between a precinct in Wyoming and a precinct in Manhattan wouldn’t normally come up. It works at large scales, whereas Ken’s point is more about small scales: zoom out and the map becomes misleading, or at the very least just as problematic as (or no more special than) any other, less granular choropleth map that doesn’t account for population. The map isn’t meant to be small-scale, doesn’t work at small scales, but then people regularly use maps for reasons not intended by the mapmaker. The mistake, I suspect, is making a map that does not work at every scale available at every scale.
Update: See this post for more reactions to the map.
Arrests have been made in the case of the rare books and maps stolen from the Carnegie Library in Pittsburgh, the New York Times and the Pittsburgh Post-Gazette report. Former library archivist Gregory Priore and John Schulman, the owner of the Caliban Book Shop, are accused of stealing some $8 million in items from the library over a 20 year period, about $1 million of which has since been identified and returned.
They both face numerous charges, including theft, receiving stolen property, conspiracy, retail theft and forgery; Priore has also been charged with library theft and criminal mischief, while Schulman is also facing charges of dealing in the proceeds of illegal activity, theft by deception and deceptive business practices.
Both men turned themselves in last Friday and were released on their own recognizance; a preliminary hearing is scheduled for 1 August. For his part Priore seems to be cooperating with the investigation.
To create the maps, New Horizons researchers, led by Universities Space Research Association (USRA) senior staff scientist, Paul Schenk, at the Lunar and Planetary Institute, registered all the images from the Long Range Reconnaissance Imager (LORRI) and Multispectral Visible Imaging Camera (MVIC) systems together and assembled the mosaics. This labor-intensive effort required detailed alignment of surface features in overlapping images. Digital analysis of stereo images obtained by both cameras were used to create topographic maps for each region; these were then assembled into integrated topographic maps for each body. These new maps of Pluto and Charon were produced painstakingly over a two-year period as data were slowly transmitted to Earth from the New Horizons spacecraft. The quality of geographically and topographically accurate maps improved with each new batch of images that were returned to Earth.
One surprise revealed by the maps: both Pluto and Charon have a lot of elevation. For example: Pluto’s Tenzing Montes range (above) rises up to 6 km above the surrounding plain, and Charon has a topographic amplitude of 19 km (only Iapetus has more). That’s seriously craggy. Keep in mind that these are not large worlds: Pluto’s radius is 1,200 km, Charon’s 600 km. [Michele Bannister]
I knew that Europa, like Jupiter’s other major moons, was absolutely baked by radiation coming from Jupiter (Wikipedia reports it at 5.4 Sv/day, a lethal dose). It did not occur to me that that radiation was not evenly distributed. In preparation for future missions to Europa, a new study, using Galileo and Voyager data, tries to map where the radiation is most intense on the Europan surface, as well as how far that radiation penetrates beneath the surface. If there’s life on Europa, it’s probably where the radiation isn’t. [JPL]
Updated "Serio-Comic Map" of Europe 2018 (after Fred W Rose), complete with Renaissance "wind-heads" for a nice, satisfied client. Lot of work but very enjoyable (and probably out of date by tomorrow) #politics#Europepic.twitter.com/BB3ZNVFW8u
A thing I missed when it came out last year: the INAT Metro Maps app, which collects, in digital form, the 40-odd maps that Jug Cerović produced for his One Metro World project. For the iPhone and iPad; costs 99¢ in the U.S., $1.39 in Canada, and (I assume) something comparable in other markets.
So, two things. The Map Room has its TLS/SSL certificate and is now running on a secure server; existing links should redirect to their https:// equivalents. And, because spam via those forms has become a problem, I’ve added a reCAPTCHA requirement to the contact and link submission pages. Hopefully neither change will break anything for anyone, but let me know if it does for you.
Because of its thick and opaque atmosphere, Titan had to be mapped in radar and infrared during a series of close flybys by the Cassini spacecraft. One artifact of this process: the resolution, lighting and atmospheric conditions were not consistent, so mosaic images and maps of Titan’s surface showed visible seams. That’s been corrected in these infrared images of Titan’s surface, released last week. The false-colour images remap infrared wavelengths to the visible spectrum, using a band-ratio technique that minimizes seams. “With the seams now gone, this new collection of images is by far the best representation of how the globe of Titan might appear to the casual observer if it weren’t for the moon’s hazy atmosphere, and it likely will not be superseded for some time to come.”
It began with an osprey named Julie, who in 2015 migrated from the Detroit River in Michigan all the way to Maracaibo, Venezuela, stopping at wetlands and wildlife refuges along the way. Julie wore a GPS tracker. John Nelson took Julie’s data and created a series of maps of her journey that represent a brilliant use of negative space: aerial and satellite imagery is shown only along the paths she took; everything else is blanked out. It’s a linear map of a bird’s entire world. The Story Map goes into more detail; the accompanying text is frankly beautifully written. John explains how he made the maps here.
Traffic. Traffic congestion is a key feature of mobile mapping, and predicting it involves looking at historical data. CityLab reports on a recent study suggests that time-of-day electricity usage patterns can be used to predict traffic congestion patterns. A household that starts using power earlier in the morning gets up earlier and presumably will go to work earlier.) It’s another variable that can be put to use in traffic modelling.