On the ArcGIS Blog, Heather White has a series of video-tutorial posts exploring how to choose colour1 when making maps, and what colours can signify on a map. From Color connotations and associations: “Colors are never neutral. They affect how people think and feel about your map. As a cartographer, you should be aware of the connotations and associations carried by the colors you use. They can be powerful tools to help you communicate more clearly. But if you ignore them, they can just as easily sabotage your map’s message.” See also Light and dark color schemes and Choose similar colors to map similar things (which you’d think would go without saying, but then things that ought to go without saying almost always need saying).
Month: May 2024
CBC News on Russian GPS Jamming
CBC News reports on GPS jamming by Russia, which has closed the airport in Tartu, Estonia until authorities could install a backup ground-based beacon. Russia has been accused of messing with GPS signals for years, but the CBC report focuses on the idea that in this case the jamming is at least in part to deal with Ukrainian drone attacks—the implication being that insofar as Estonia is concerned, this is collateral damage (to which Russia is presumably indifferent at best).
See also the BBC News story from earlier this month (previously).
New Leventhal Exhibition: ‘Heaven and Earth: The Blue Maps of China’
A new exhibition at the Boston Public Library’s Leventhal Map Center, Heaven and Earth: The Blue Maps of China, focuses on two extraordinary Chinese maps from the early 19th century printed using Prussian blue pigment.
These maps were presented in an extraordinary format, on eight vertical sheets printed in the style of rubbings. Even more strikingly, they were rendered in a rich blue coloring. The pigment Prussian blue had recently begun to be produced in China, and these maps were amongst the first printed objects in East Asia to make use of the colorant—predating the famous use of Prussian blue by Japanese print artists soon after.
The blue maps were more than just visually astonishing. They also captured Chinese ideas about the relationship between terrestrial and celestial space, and still provide insight today into how Chinese scholars and artists conceptualized the world around them. Beautiful and powerful in equal measure, these blue maps capture details of a transitional moment in the history of China—and the wider world. This exhibition considers these two maps in the context of their production, consumption, and functionality, revealing them as unique objects in the global history of mapmaking.
The online version is full of interesting detail about the maps’ materials and production. The physical exhibition opened last weekend and runs until 31 August 2024. Free admission.
Canada’s Early Wildfire Season
Another year, another map from the European Space Agency showing the extent of Canada’s wildfires based on data from the Copernicus Sentinel-5P satellite. It’s not nearly as bad as last year’s, but it’s way earlier. The above is a frame from an animated map showing carbon monoxide concentrations earlier this month. “The extremely high concentrations, depicted in dark shades of orange, can be linked to active fires during this time period.”
Previously: Two Ways to Visualize Canada’s Wildfires.
The Aurora Seen from Space
A view of the aurora borealis from space, captured by the VIIRS instrument aboard the Suomi NPP satellite at 3:20 am CDT on 11 May 2024. NASA Earth Observatory:
The VIIRS day-night band detects nighttime light in a range of wavelengths from green to near-infrared and uses filtering techniques to observe signals such as city lights, reflected moonlight, and auroras.
In this view, the northern lights appear as a bright white strip across parts of Montana, Wyoming, the Dakotas, Minnesota, Wisconsin, Iowa, and Michigan. But auroras are dynamic, and different coverage and patterns of light would have been visible at other times of the night. And while these satellite data are shown in grayscale, viewers on the ground saw colors from green (the most common) to purple to red. Atmospheric compounds found at different altitudes influence an aurora’s color.
It boggles the mind a bit that by imaging the aurorae from above, with city lights visible and states and lakes outlined, what we kind of have, above, is a map of the aurorae—at least at a single moment in time.
A Library of 17th-Century Map Elements, Useful for Fantasy and Game Maps
David Stark extracted elements from a 1688 map of part of Germany to create a library of tree, hill and town signs that he thought entirely appropriate for use as map assets for a role-playing game. I look at them and see fantasy map design elements. In 2019 I noted the similarities between 16th-century maps and modern fantasy map design. Also, digitally created fantasy maps often feature clone-stamped hill signs; you could do worse than clone-stamp these if you were whipping a fantasy map up. At least there’s more than one kind of hill sign to clone-stamp: there are, in fact, 159 hills and 26 mountains—more than 400 tiny images in all, and it’s interesting that David has separate categories for towns and cities, and for hills and mountains. [via]
Site Updates and Upgrades
More than two dozen book listings have just been added to the Map Books of 2024 page. I’ve also been making some long overdue tweaks to the design and functionality of the site, including switching to WordPress’s Gutenberg editor at long last (which has, unsurprisingly, involved some glitches and hiccups). Also, the Tumblr mirror has been retired; see the Subscribe and Follow page for other ways to receive new updates.
Solar Storms and Precision Agriculture Don’t Mix
We were warned that this weekend’s solar storm could have an impact on GPS and navigation systems. 404 Media reports that it’s causing outages in the GPS and real-time kinematic (RTK) positioning systems used in many farmers’ tractors, right in the middle of planting. This is a bigger problem than you might think: quite a lot of crops are grown using precision agriculture, “with farmers using increasingly automated tractors to plant crops in perfectly straight lines with uniform spacing. […] If the planting or harvesting is even slightly off, the tractors or harvesters could damage crops or plant crooked or inconsistently, which can cause problems during the growing season and ultimately reduce yield.” To say nothing of the harvest. Precision agriculture achieves centimetre-level accuracy, but also relies on it, and losing it at one step of the process can’t be good. [Engadget, The Verge]
G5-Scale Geomagnetic Storm in Progress
The Earth is being hit by a solar storm at the moment; NOAA’s Space Weather Prediction Center (SWPC) has observed severe (G5) geomagnetic storm conditions for the first time since 2003. Among other impacts, this may disrupt GPS and other navigation systems. On the other hand this also means aurorae where they’re rarely seen: see SWPC’s aurora dashboard for maps.
Previously: NOAA’s Aurora Forecasts.
Napoleon’s Adriatic Atlas
An online exhibition by the National and University Library in Zagreb (NSK) focuses on an atlas of Adriatic sea ports commissioned by Napoleon after the French Empire’s annexation of Italy in 1805. The Library’s English-language announcement:
Commissioned by Napoléon Bonaparte himself and marked by exceptional scientific and artistic value, the 1806 atlas consists of charts and topographical views of the eastern part of Croatia’s Adriatic coastline, whose annexation to Napoleon’s empire prompted the atlas’s creation by famous cartographers Charles-François Beautemps-Beaupré, Ekerlin and Paolo Birasco.
The atlas’s significance in documenting the first scientifically based hydrographic surveying of the Adriatic in history and thus being an indispensable resource in any Adriatic-related research is matched by its exquisiteness in terms of its purely artistic features.
The Library’s copy of the atlas was acquired at a public auction in London in 1979. More about the NSK’s map collection (in English; all links in Croatian unless otherwise indicated).
A Very Personal Map Exhibition
An exhibition of maps from the personal collection of our friend Alejandro Polanca Masa is taking place at the municipal auditorium of his home town of Guardo, Spain. Free admission, runs until September 15. Alejandro writes (link in Spanish): “Quien pase por allí, puede disfrutarlo gratuitamente. Y mola, porque he seleccionado mapas desde el siglo XVIII hasta 1960, todos originales, que se pueden ver y tocar, incluyendo atlas y libros sobre cartografía. ¿Te lo vas a perder?”
Flooding in Rio Grande do Sul
Devastating floods in Rio Grande do Sul, Brazil’s southernmost state, have killed at least 95 people and displaced 150,000 more. NASA Earth Observatory posted the above Landsat 8 image of downtown Porto Alegre (population: 1.5 million), as well as MODIS images of the overflowing Jacuí River. CNN has before-and-after Maxar imagery of Porto Alegre.
The Evolution of U.S. Time Zones
A short video from Vivid Maps showing the evolution of time zone boundaries in the United States. (The trend was inexorably westward: Michigan started out completely CST.)
Carl Sack
Carl Sack, activist, cartographer, professor and NACIS stalwart, died last week of a sudden cardiac arrest at the age of 41. Here is his memorial page. On Mastodon, Daniel Huffman wrote: “I will have more words about him later on, but for now I will say that Carl was a beloved educator and member of the NACIS community, and a valued friend. It’s still pretty hard to believe he’s gone.”
Help The Map Room Go Ad-Free
Earlier this year my ad revenue increased nearly tenfold. This obviously led me to conclude that it’s probably time to stop relying on ad revenue, and try moving to a model based on reader support. If you’d like to understand how I came to that contradictory conclusion, read on; otherwise the tl;dr is that you can now support The Map Room via monthly payments at both Ko-fi and Patreon. When monthly payments reach a certain level (see below), I will discontinue ads on this site.
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