Month: January 2022

Hunga Tonga-Hunga Ha‘apai, Before and After

Published on by Jonathan Crowe
Two maps showing Hunga Tonga-Hunga Ha‘apai before and after the volcanic eruption of January 2022
NASA Earth Observatory/Joshua Stevens; data courtesy of Dan Slayback/NASA/GSFC.

NASA Earth Observatory has released digital elevation maps of Hunga Tonga-Hunga Ha‘apai both before and after the volcanic eruption earlier this month.

The digital elevation maps above and below show the dramatic changes at Hunga Tonga-Hunga Ha‘apai, the uppermost part of a large underwater volcano. It rises 1.8 kilometers (1.1 miles) from the seafloor, stretches 20 kilometers (12 miles) across, and is topped by a submarine caldera 5 kilometers in diameter. The island is part of the rim of the Hunga Caldera and was the only part of the edifice that stood above water.

Now all of the new land is gone, along with large chunks of the two older islands.

The Lighthouse Map

Published on by Jonathan Crowe

Animation of lighthouse beacons in northern Europe

A map showing the lighthouses of Europe has gone viral on social media. It’s a Geodienst project that actually dates back to 2017 or so. The map is generated using lighthouse data extracted from OpenStreetMap. “More specifically, it asks the Overpass API for all elements with an seamark:light:sequence attribute, decodes these, and displays them as coloured circles on the map using Leaflet. It also tries to take the seamark:light:range and seamark:light:colour into account.” (The above animation, taken from the project’s GitHub page, doesn’t show colours, but maps can be built that do, and the example going viral does.)

TomTom Says Its Algorithms Avoid Potentially Dangerous Routes

Published on by Jonathan Crowe

It probably has nothing to do with Google redirecting traffic up poorly maintained mountain roads during a blizzard in California last month (previously), but TomTom has posted a piece explaining how its algorithms avoid sending drivers down potentially dangerous routes in Finland even though, on paper, they’re shorter.

TomTom’s routing and location technology recognizes that the shorter route to Koli National Park is on winding unpaved roads, made up of sand and gravel, and it takes that into consideration when computing a route for a driver. It places significant importance on this information. […] Even though the unpaved route is shorter, it’s still not considered “better” than the longer paved route when all things are considered. If map data didn’t include this contextual data about the specific road, the unpaved road would most likely be the default route suggestion.

Mapping Methane Emissions

Published on by Jonathan Crowe
World map of methane emissions from fossil fuel exploitation
Methane emissions from oil, gas, and coal exploitation in the Global Fuel Exploitation Inventory (GFEI) version 1 in 2016 (Mg/y/km2)

NASA Earth Observatory:

Funded by NASA’s Carbon Monitoring System, scientists recently built a new series of maps detailing the geography of methane emissions from fossil fuel production. Using publicly available data reported in 2016, the research team plotted fuel exploitation emissions—or “fugitive emissions” as the UNFCCC calls them—that arise before the fuels are ever consumed. The maps delineate where these emissions occur based on the locations of coal mines, oil and gas wells, pipelines, refineries, and fuel storage and transportation infrastructure. The maps were recently published at NASA’s Goddard Earth Sciences Data and Information Services Center (GES DISC). (Note that 2016 was the most recent year with complete UN emissions data available at the time of this study.)

The Challenger Map Re-Emerges; Fundraising Campaign Under Way

Published on by Jonathan Crowe

The iconic Challenger map—a 26×24-metre exaggerated relief map of British Columbia made of nearly a million pieces of jigsaw-cut plywood, is now on display at the B.C. Sports Hall of Fame as part of an exhibition on the early days of the Pacific National Exhibition, where the map was on display between 1954 and 1997. This is only for a few months; its appearance part of a fundraising campaign to restore the map.

Previously: Challenger Map Gets Reprieve; Challenger Map Update; Another Challenger Map Update; Challenger Map Back on Display, Sort Of.

North of Nowhere: The Osher’s Fantasy Map Exhibition

Published on by Jonathan Crowe

The Osher Map Library’s new exhibition, North of Nowhere, West of the Moon: Myth, Fiction, and Fantasy in Maps, opened on Saturday.

North of Nowhere title cardInspired by our recent acquisition of Bernard Sleigh’s six-foot long “An Ancient Mappe of Fairyland, Newly Discovered and Set Forth,” (1918) we have selected thematic maps, books, and ephemera from our collections that reflect whimsy and visionary thinking. This exhibit invites visitors to ponder the ways in which myth, fantasy, and fiction have, for centuries, provided both an escape into alternate worlds in times of great strife, as well as an opportunity to create alternate worlds and imagine new realities.

Runs until May 30th; free admission with timed ticket. The digital version won’t be online until February (I’ll post an update then, because this is very much relevant to my interests), but in the meantime the Library is posting teasers on its Instagram account.

New Exhibition: Mapping Fiction

Published on by Jonathan Crowe

Title card for the Huntington Library's Mapping Fiction exhibitionA new exhibit on the relationship between maps and literature, Mapping Fiction, opened on January 15th at the Huntington Library, Art Museum, and Botanical Gardens in San Marino, California. “On view in the Library’s West Hall, the exhibition is timed to coincide with the centennial of the publication of James Joyce’s groundbreaking 1922 modernist novel, Ulysses. […] About 70 items will be on view, focused on novels and maps from the 16th through the 20th century—largely early editions of books that include elaborate maps of imaginary worlds.” Tickets required; runs until May 2nd. More from the Guardian. [WMS]

Tupaia’s Map Reinterpreted

Published on by Jonathan Crowe
Tupaia’s map
Tupaia’s map

At Knowable, Cristy Gelling looks at new interpretations of Tupaia’s map of the Pacific Ocean. Tupaia was a Polynesian navigator who became attached to Cook’s expedition. His map, drawn beginning in 1769, has confounded observers because its islands do not line up with the actual geography of the Pacific’s islands. One 2018 study deciphers the map with an alternative, more complicated arrangement in which north is at the centre of the map. This proposal is not universally accepted.

States of Confusion

Published on by Jonathan Crowe

Richard Peter Johnson has been posting quizzes on Reddit where the shapes of countries and U.S. states are flipped, rotated and/or inverted and you’re challenged to identify them. It’s actually harder than you might think—especially when they’re inverted or mirror-flipped—and messes with your perception in the way that, say, upside-down world maps do.

COVID-19 Deaths in the Post-Vaccine Era

Published on by Jonathan Crowe
Maps from the New York Times showing in which U.S. counties COVID deaths increased or decreased after vaccines became widely available.
The New York Times

The New York Times looks at the death rates from COVID-19 after vaccines became widely available. Along with analyses of racial and age groups, there is this on the geographic front: “Where people are dying of Covid-19 also has changed since vaccines became widely available. Death rates fell in most counties across the country, and in about one in five counties, the death rate fell by more than half. But in about one in 10 counties, death rates have more than doubled.”

CityLab Continues Its COVID Mapping Project

Published on by Jonathan Crowe

Bloomberg CityLab is continuing its COVID-19 mapping project: they’ve issued another call for reader-submitted maps. “[T]he new year is a chance to take stock of where we stand now. Once again, Bloomberg CityLab invites you to make a map that reflects on how your world has shifted or been reframed during the pandemic.” Due date is 17 January.

The Quarantine Atlas (book cover)Previously: CityLab Wants Your Hand-Drawn Quarantine Maps; Maps from Isolation; CityLab Wants Your Homemade Map of 2020.

Preorder The Quarantine Atlas: Mapping Life under COVID-19 at Amazon (Canada, UK).