Reading Historic Maps: A Practical Guide “is an educational resource designed to help students and educators better understand historic maps. Focusing on depictions of navigation and conquest in world maps, the guide explains where to find these maps and how to analyze both common and unique cartographic details. The guide also contains suggested further readings and appendixes of additional maps to view.” Created by Kathy Hart, this 12-page PDF document covers the basics of what the details on old maps can tell the reader. [Paige Roberts]
Author: Jonathan Crowe
Jonathan Crowe blogs about maps at The Map Room. His essays and reviews have been published by AE, Calafia, The New York Review of Science Fiction, the Ottawa Citizen, Strange Horizons and Tor.com. He lives in Shawville, Quebec.
A Tool to Generate Tactile Street Maps
Speaking of tools for generating maps for the blind and visually impaired (previously), there’s also TMAP (Tactile Maps Automated Production) from Lighthouse’s MAD Lab.
TMAP is a screen reader-friendly tool for creating tactile street maps. Raised lines and textures represent roads, pedestrian paths, and railways. Maps range from a few blocks to a few miles wide.
Map creation is automated; you do not have to design and label maps. Simply enter an address, intersection or landmark into the search bar. Then choose settings for paper size and map scale, and which features to include on the map.
The maps can be ordered from Lighthouse’s store or printed on an embosser or tactile printer (as opposed to a 3D printer). Thanks to Fred DeJarlais for the tip.
Two Light Pollution Maps
It’s been a while since I last posted something about light-pollution maps, which are used by astronomers to determine the best places to observe the night sky. But a couple of online light-pollution maps came to my attention recently: the Light Pollution Map at lightpollutionmap.app and the Light Pollution Map at lightpollutionmap.info. They’re different services despite being similar in name and in function, though I’d give the edge to .app in user-friendliness; .info has more tools but is fiddlier. (The usual tech dichotomy.) Confusingly, .info, not .app, is the one with the iPhone/iPad app. Both rely on NASA VIIRS data and give Bortle scale measurements for a selected location, which is the main thing. [Maps Mania/MetaFilter]
Previously: Light Pollution Maps; Testing Light Pollution Maps; Testing Light Pollution Maps Redux; Darker Than You Think; New Atlas of Artificial Sky Brightness.
How xkcd Does Maps
Randall Munroe, author of the xkcd web comic, posts a surprising amount of map-related content, which I invariably end up linking to here. With some exceptions, they fall into one of two categories, each of which has a recent example.
The first category is a hand-drawn infographic map showing, in earnest, some interesting or surprising information. See, for example, this map showing the most observed animal or plant in each U.S. state:
Other maps of this ilk include drainage basins, lesser-known towns sharing a famous place name, least informative Google Trends maps, and maps of the 2016, 2018 (challengers) and 2020 elections.
The second category is where Randall chooses the path of violence, with maps clearly designed by Black Hat Guy to hurt our brains. These include a series of maps that mangle U.S. state borders (1, 2, 3). But the most insidious are his Bad Maps Projections series, the most recent of which projects continents onto their own globes:
Thing is, this one isn’t as brain-curdling, because similar globes—globes that depict a portion of the world on an entire sphere—exist in the real world.
Ordnance Survey Settles with Family Business Over Map Blanket Design Dispute
The Sunday Times reports [Apple News+ link] that a small family business selling map-themed picnic blankets has reached a settlement with the Ordnance Survey. Rubbaglove’s PACMAT series was launched in partnership with the OS, but their sales “stalled” after the OS launched their own line of “almost identical” blankets, which, they said, violated their design trademark. In addition to a monetary settlement, the OS has agreed not to sell competing products for 10 years.
3D Printed Tactile Maps
Touch Mapper is an open source project (GitHub) for generating 3D printed tactile maps for the visually impaired. The maps use OpenStreetMap data and produce a file that can be printed on almost any 3D printer, or ordered for a fee. The project started nearly a decade ago but I only stumbled across it today.
Previously: 3D Printed Maps for the Blind and Visually Impaired.
At the Newberry in October
Several things coming up at Chicago’s Newberry Library in October:
An exhibition, Mapping Outside the Lines, runs from 9 October 2025 to 14 February 26 at the Newberry’s Trienens Galleries.
For centuries, mapmakers have experimented with the placement, density, and purpose of lines like these to make maps seem simple and objective. Just follow this line and you’ll have everything you need—or so the map leads you to believe. These lines are never as straightforward as they seem. This exhibition follows lines on maps to their extremes. By exploring how maps use lines to make the world legible, the exhibition will bring you through examples of mapmakers and artists who have created, bent, and broken these linear rules. By following these lines, you will find maps to be more complex and more motley than they ever imagined!
The 22nd annual Nebenzahl Lecture Series, Mapping from Mexico: New Narratives for the History of Cartography, runs from 16 to 18 October 2025.
The 2025 Nebenzahl Lectures continue to promote new thinking in map history by asking how orienting our stories from Mexico, looking out toward the rest of the world, challenges common narratives and popular assumptions in the history of mapmaking. Despite the prominent role mapping in Mexico has played, cartographic histories are often told from a European perspective. But how do the stories we tell, methodological assumptions we make, and categories we define about maps and map history change when we treat sites of production and reception in Mexico—from Mexico City, Oaxaca, and Puebla to the borderlands—with the same specificity map history has given to European centers?
The Newberry is also hosting a rare map and book fair the same weekend to coincide with the Nebenzahl Lectures.
NOAA Will Continue to Receive Vital Satellite Data After All
NOAA’s hurricane forecasts will continue to be able to use data from the Defense Meteorological Satellite Program (DMSP). Michael Lowry reports that in a last-minute reversal, the U.S. Department of Defense will continue to allow NOAA to have access to that data for the remainder of the satellites’ lifespan (about a year or two). NOAA and NASA had been told that they’d lose access to the data today: see previous entry. In an earlier post Lowry challenged the notion that a viable substitute could be found for the DMSP’s Special Sensor Microwave Imager Sounder (SSMIS) data, the loss of which he described as “significant and devastating” to hurricane forecasting. [Wonkette]
Review: Telling Stories with Maps
Fundamentally, Allen Carroll’s Telling Stories with Maps: Lessons from a Lifetime of Creating Place-Based Narratives is a book about using Esri’s ArcGIS StoryMaps service for creating digital narratives with maps. It’s of little use to anyone not using StoryMaps, but it’s not quite a user manual either. It presents the theory and practice of map-based storytelling, as applicable to the StoryMaps user base, with examples from Carroll’s long career, most notably at the National Geographic Society from 1983 to 2010, and then at Esri, where he went on to found their StoryMaps platform.
Carroll’s transition from National Geographic to Esri—a good chunk of Telling Stories with Maps serves as a memoir of Carroll’s working life—parallels a transition from analog to digital storytelling, and despite differences in medium, Carroll demonstrates that map-based narratives cover both the National Geographic maps (think the back sides of the map inserts) and interactive maps.
As StoryMaps emerged, one tool at a time, it presented a challenge: as Carroll notes, its users were GIS professionals who were not necessarily equipped to be storytellers—to be able to craft a narrative that held the attention of the reader. Telling Stories with Maps is an attempt to address that knowledge gap, with a bit of theory of narrative and a boatload of real-world examples (collected online here, because in-book screenshots can only do so much). As such it’s a book about what StoryMaps is for—what you can do with it, the best way to use it—rather than a step-by-step instruction manual.
I received an electronic review copy from the publisher.
Telling Stories with Maps
by Allen Carroll
Esri, 10 Jun 2025
Amazon (Canada, UK), Bookshop
Re-Purposing Maps: The Art of Mark M. Garrett
Responding to my post about Joanathan Bessaci’s map cutout art, Fred DeJarlais wrote to point out that the California Map Society’s journal, Calafia, featured another artist using a similar technique, Mark M. Garrett, in its Fall 2022 issue. It’s a good piece in which Garrett goes into detail about his inspiration and method, but since Calafia’s archives are member-only, I’ll point you to Garrett’s website, which is full of examples of his work, and where he explains his work thusly:
At some point I began to fold paper and ‘draw’ with scissors . . . particularly re-purposing maps or anatomy texts culled from flea markets or estate sales. I often incorporate opaque and transparent watercolor as an extension of the color palette printed on the charts. I find comfort in the creative and obssesive nature of these collages as each reveals a unique process and persona over time. New worlds emerge in oddly emotional interpretations of once familiar places. There’s an anticipation as they shift and evolve from factually printed documents to new and potentially uncertain places of possibility. The technique of hand-cutting maps and painting in the gaps emerged for me as a metaphor of holding the world even as its outlines shift radically and unpredictably.
Sharpiegate Investigators Placed on Leave
CNN reports that two NOAA officials who led the internal “Sharpiegate” inquiry—which found that NOAA leadership violated its ethical standards and scientific integrity policy when they backed Trump’s Sharpie-adjusted hurricane forecast map—were placed on administrative leave on Thursday. In a complete coincidence, one of the officials they found in violation, then-acting NOAA administrator Neil Jacobs, has been nominated to become Trump’s new NOAA administrator, with a committee vote on his nomination coming next week.
Previously: Inside NOAA During Trump’s Sharpie Mapmaking Period.
Ordnance Survey Asked to Change Route of Historic Path Through Dartmoor
Nick Pannell wants the Ordnance Survey to change the route of the Abbot’s Way path through Dartmoor National Park in Devon, England. Pannell says his own research shows that medieval monks took a more northerly route between Buckfast and Tavistock, and that the path shown on OS maps since 1886 is wrong. The OS doesn’t dispute Pannell’s research, but says that the current route existed 130 years before the initial survey, and there are no currently existing paths along Pannell’s preferred route. This seems to be a case of the prescriptive vs. the descriptive: Pannell shows where the path used to be or ought to have been, the OS shows the current reality on the ground. Nor can OS change the map unless, per the article, Historic England changes the official route: it’s not OS’s call to make.
Vector Tiles Arrive on OpenStreetMap
Vector tiles have been deployed on OpenStreetMap (see the “Shortbread” layer in the map layers menu). This technical upgrade was first announced last year; it’ll provide, they say, “a visual layer that is sharper and quicker, based on an entirely new backend.”
The World Turned Upside Down and Other Globes: A Roundup
Mark Wallinger’s World Turned Upside Down, a 13-foot globe on the LSE campus with the South Pole on top, generated controversy (and vandalism) after its unveiling in 2019 for how it handled contested borders: it shows Lhasa as a capital, Taiwan as a separate country, and omitted Palestine. I mean, it’s on a university campus: controversy about such things was inevitable. Via Mappery; more at Atlas Obscura and Brilliant Maps.
Mappery also points to a 19th-century globular clock that shows the sun’s position at noon on the globe, which I find awfully intriguing, which is to say I want one.
The Library of Congress is changing how it stores its rare globes, replacing acrylic vitrines (heavy, bulky, and potentially off-gassing compounds that put the globes at risk) with archival cardboard cases, which are less sexy but more practical—we’re talking about storage, not display. I’m actually surprised that rare globes had essentially been stored in display cases.
Wild World, the Jigsaw Puzzle
I missed that a jigsaw puzzle version of Anton Thomas’s Wild World (previously) was released in January. The puzzle has 1,500 pieces and measures 39×20 inches when completed. Anton says that if you’re in the U.S. or Canada it’s best to order from the publisher’s website; it’s also listed on Amazon.