The National Ground Water Association has announced the launch of an interactive map showing the location of some 14 million water wells in the United States (yes, Alaska and Hawaii too). “Use this tool to estimate well depths for new installations, analyze water table trends in your area, identify neighboring wells before drilling, research historical well data, and make informed decisions about well placement and design.” [Tara Calishain]
Links
A Short Course on Maps as Historical Sources
Historic Maps: Interpreting Stories of Place is a three-day short course on using maps as historical sources is being offered by the Institute of Historical Research in London from January 28 to 30, 2026.
Although maps have long been a part of historical research, they are subjective and should always be analysed in the same way as any other primary source. This dynamic 3-day Historic Maps Discovery Training will include lectures, one-to-one consultations, library tours, visits to our special collections and opportunities to explore our digital resource Layers of London. Together, we will learn about the different types of historic map, from the evolution of cartography to the simple digital tools you can use for comparison and analysis in your own projects.
It costs £240; no prior expertise or experience required. Via Katie Parker, who’s one of the instructors.
South Korea Deciding Whether to Grant Google and Apple Access to Domestic Map Data
TechCrunch: “South Korea is nearing a decision on whether to allow Google and Apple to export high-resolution geographic map data to servers outside the country. The detailed maps, which use a 1:5,000 scale, would show streets, buildings, and alleyways in far greater detail than currently available on these platforms. However, several regulatory and security hurdles remain unresolved.” South Korea, which is technically still at war with North Korea, restricts data from the National Geographic Information Institute from being used outside the country, and has denied previous requests from both Google and Apple; Google, which stores its map data outside South Korea, has hitherto had to make use of less-detailed, lower-resolution data.
Two Mapmakers Awarded MacArthur Fellowship
Tonika Lewis Johnson, whose Folded Map Project explores decades of segregation in Chicago neighbourhoods, and Margaret Wickens Pearce, whom Map Room readers might remember for Coming Home to Indigenous Place Names in Canada, are among the 22 recipients of this year’s MacArthur Fellowships. News coverage: AP, NPR. [Alan McConchie]
Strava v. Garmin
CBC News reports on Strava’s lawsuit against Garmin, which alleges patent infringement and breach of contract. Strava claims that Garmin is violating Strava’s patents relating to heatmaps and segments, and also says Garmin’s new developer guidelines require the Garmin logo to be present in every single post and image: “We already provide attribution for every data partner, but Garmin wants to use Strava and every other partner as an advertising platform.” Athletes who rely on both Garmin and Strava are just a bit concerned. (It may be worth mentioning that Strava added restrictions on third-party apps to its own API last year: see DC Rainmaker and The Verge.) Garmin isn’t commenting (pending litigation, etc., etc.).
Ethics in Cartography
Nat Case writes about the ethics of cartography in Psyche:
You might think there’s not a lot to get moralistic about in the world of mapping. You would be wrong. For decades now, various critiques have been raised about cartography, its history, its current practice, its complicity in the evils of the world, and cartographers’ degree of responsibility. On the one hand, cartographic history in the West is bound up with institutions that created maps to prosecute war, subjugate colonies, extract wealth from the earth regardless of who was already living there, and manage mass social engineering including a large-scale oppression. Maps can also be tools that create individual agency by giving any map-reader a manager’s view of the world. That part tends to be noncontroversial. It’s who we work for and with that causes some people to raise concerns.
First Radar Images from NISAR
Preliminary images are in from the newly launched NISAR Earth-observing radar satellite. A joint mission between NASA and the Indian Space Research Organization (ISRO), NISAR will use L-band and S-band synthetic aperture radar to produce images of land cover, soil moisture, vegetation, sea and ice and so forth at resolutions of five to ten metres. (For comparison, SRTM’s resolution is one arcsecond—30 metres at the equator.)
Oculi Mundi
Geographical has an article about Oculi Mundi, the online home of the Sunderland Collection, a private collection of 13th- to 19th-century maps amassed over the years by its eponymous founder, Neil Sunderland, that sat in storage before the decision to digitize it and make it more accessible. I’m glad the article is here to introduce us to the collection, because the Oculus Mundi site is a bit over-designed and can be a challenge to navigate, especially at first. But making private map collections digitally accessible is always a good and laudatory thing, and in this case there’s plenty of good stuff to browse: try starting with this link.
How Maps Lie
Last week Andrew Middleton (he of The Map Center) gave a presentation at the Dickinson Memorial Library in Northfield, Massachusetts. Titled “How Maps Lie,” it’s the kind of introductory talk that can never be done too much: about what maps actually do, and the distance that can exist between the map and the territory. The video is an archived livestream; the talk itself stars about 15 minutes in.
The 2024 U.S. Presidential Election Mapped at the Precinct Level
VoteHub has released a precinct-level map of the 2024 U.S. presidential election results that includes vote density as well as margin—in other words, taking into account how many votes are in a district, not just by how much (tempering the fact of winning 90% of the vote in a district with the fact that there are only 100 votes to be had in the district, say). [Maps Mania]
Meanwhile, VoteHub is also tracking the unusual and hinky attempts at gerrymandering U.S. congressional districts outside the usual census cycle, with a map showing which states are involved and what the potential impact might be.
Two Books Map London
Two books out this year, both from Batsford, explore London through maps. Vincent Westbrook’s Modern London Maps focuses on more than 60 maps from the 20th century. Like many books of this kind, Modern London Maps draws primarily from a single source: the London Archives. Mapping London reviewed it last month: “probably quite close to the book that we would have published.” And out next month, The Boroughs of London collects Mike Hall’s “boldly coloured, highly detailed maps of every London borough, inspired by classic 1960s graphic design,” pairing it with commentary by Matt Brown.
- Modern London Maps by Vincent Westbrook. Batsford, 8 May 2025, £30.
Amazon (Canada, UK), Bookshop. - The Boroughs of London by Mike Hall and Matt Brown. Batsford, 9 Oct 2025, £30.
Amazon (Canada, UK), Bookshop.
Related: Map Books of 2025.
Northern’s New Network Map
Matt Harrison explains how his firm, Transport Designed, redesigned the network map for Northern, a train company that handles passenger services across northern England, from Liverpool to Newcastle.
Northern’s historic network map, whilst representing the sheer size and scale of the train operator’s network, didn’t actually show you where you could travel to and from.
It represented the network as an amorphous blob of interconnected dark blue lines, but did nothing to communicate the intricacies of how to actually get between any two places.
That was our starting point.
How do you represent such a vast network, and make it make sense in a way that customers can quickly and easily understand?
2025 Ruderman Conference Announced
The fifth biennial Ruderman Conference on Cartography, which will be held 8-10 October 2025 at Stanford’s David Rumsey Map Center, focuses on the cartography of “anything but the earth’s surface,” viz., astronomy, geology, oceanography. Schedule, speakers and abstracts on the website; tickets (free) here.
The Guardian Looks at Recent Map Mishaps
With the organizers of the Great North Run apologizing for printing t-shirts and medals with a map of Sunderland rather than Newcastle, the Guardian takes the opportunity to look at recent instances of map mistakes, from dangerous routings to a too-short marathon route to a phantom supermarket in Wales.
More on Suspected Russian GPS Interference in the Baltic
Lots of coverage at Polish news network TVP World on suspected Russian GPS jamming in the Baltic region. A report submitted by the Baltic states to ICAO found that 123,000 flights were disrupted by GPS jamming in the first four months of 2025; 27.4 percent of flights were disrupted in April. Sweden’s transport agency says it’s getting near-daily reports of GPS jamming from pilots: “Since late 2023, reported GNSS disruptions to the Swedish Transport Agency have surged from 55 in 2023 to 495 in 2024, with a preliminary count of 733 incidents in 2025 as of August 28.” GPS disruptions in the region have been traced to a facility in the Russian exclave of Kaliningrad.