…published a new version of d3-tricontour observablehq.com/@fil/multipo...

Reminded me of this (if you think of structural breaks as shifting between equilibria on an S-curve). observablehq.com/@fil/fitting... web.archive.org/web/20220523... Also shows why historical/domain-specific intuition is so important. HT @fil.rezo.net and Constance Crozier

Big fan of @observablehq.com and since their preview release of Observable Notebooks 2.0 my team at Fora Health have integrated Notebook Kit into our app. Works really well so far. Quick demo ⬇️ screen.studio/share/TqvyfFbU

Observable Notebook Kit and Desktop 1.1 are out. Headline feature: database connectors! 🎉 You can now query DuckDB, SQLite, Postgres, and Snowflake directly from notebooks. And it’s self-hosted. And it saves results automatically for performance and stable analysis. observablehq.com/notebook-kit...

charts you hate to see

Very interesting open access article about the "Long-term impact and biological recovery in a deep-sea mining track" by D.O.B. Jones and colleagues. Their photos of the ocean floor after mining, before and after, are simply shocking. #geoscience www.nature.com/articles/s41...

If you want to go, there’s just one more day of viewing (Monday 16th). Bring tissues.

Atlanta is the most surveilled city in the United States. But because the Atlanta Police Department claims that releasing the locations of these 60,000+ cameras will lead to terrorism, we’ve not been able to map their locations... Until now. Read more 👇👇

Fut un temps où les questions géopolitiques avaient une place de premier plan dans l'espace public en France, y compris avec de fantastiques efforts carto & dataviz Les modifications de #frontières dans les Balkans à la Une du journal Excelsior, 21/2/1921

As the United States vetoes another Israel-Palestine ceasefire resolution at the UN Security Council, here's a graphic I made for @afp.com showing every veto on a similar resolution since 1970.

bump bump

"The 1930’s International Atlas of Clouds + of States of the Sky... provides a detailed textual description of different kinds of clouds, their shapes, the occurrences of the clouds, their behaviour, and a description of the disturbances the clouds indicate." socks-studio.com/2024/03/24/o...

Vous n'aimez pas le covid ? 😷 Vous aimez bien les cartes ? 📍 Ce fil est fait pour vous ! ⤵️ #AutoDéfenseSanitaire #CovidIsNotOver

A trick for fitting world maps on phones: Stack two azimuthal equal-area projections, clipped at 90° longitude, each one rotated 180° from the other. The bottom map covers the top's Antarctica, which reduces the total height and looks nice. As seen in www.nytimes.com/2025/04/25/c...

On the love ⟷ hate gradient for marmite maps I'm firmly on the right hand side

A blog by Chris Wesson and me on the new contiguous cartogram functionality in ArcGIS Pro www.esri.com/arcgis-blog/...

Better world maps for mobile! Despite years of mobile-first design, there’s been little experimentation in this area. So we designed our own at NZZ – and validated it in a large user study. Summary of the paper: jonasoesch.ch/articles/the... 1/3

I am speechless... >> First fault movement ever filmed. M7.9 surface rupture filmed near Thazi, Myanmar m.youtube.com/watch?v=77ub...

I love these!

A detail to love in these maps by @naemas.bsky.social: the palette is asymmetric (subsiding values go to -8, uplifting values to +2), underscoring how land in many American cities is sinking much faster than it is rising. wapo.st/3F586ov #dataviz 📊 #maps #cartography 🗺️

Ever needed to simplify street networks? I did. And it is a pain. So we wrote an algorithm that does that for us. And can do for you, as it is available as a Python package called `neatnet`. Here's a short blog about it - martinfleischmann.net/simplificati... and package - uscuni.org/neatnet

"A new dataset, visualized as maps, reveals the extent to which African workers are indirectly employed in the tech sector, doing content moderation, customer service, and data annotation for AI models, among other jobs." restofworld.org/2025/big-tec...

#MapMonday On this day in 1986, 2 days after the nuclear accident at Chernobyl power station, Soviet TV news show, Vremya, announced the event. This map graphic from www.bbc.co.uk/news/science... shows radiation levels after a study in 2019

I tried out A5 and I liked it observablehq.com/@fil/a5-dggs

New project! Made a tool lets you explore, subset and summarize over 10M rows of data from the Time Use Survey of India in your browser. How people in different states, professions and groups spend their time? And then export your findings for #dataviz too! diagramchasing.fun/2025/time-us...

the markets are worse than they appear due to plummeting US dollar S&P 500 is down 13% since inauguration (yikes!) but it's way worse if you put it in € (🔻21%) or gold (🔻28%). ... this chart inspired by a table in r/stocks www.reddit.com/r/stocks/com...

So I have another visualization showing the *angles* between the points. Here, Poisson Disk has no particular angle. Neither does Jittered Grid. If I decrease the jitter, the angles become uniform. So what I'm looking for is even distribution of angles *and* a tight distribution of distances.

I was adding the avg z to the hex map, but then I thought…I wonder what it would look like if I wrote an ArcPy script to randomly distribute random sized overlapping squares over the US and give each of those the z mean of the area they fall over. #arcgispro #arcpy #b3d

NEW: In agency after agency, the U.S. government is losing its capacity to measure how American society is functioning, making it much harder to gauge the nature and scale of the problems we are facing and the effectiveness of policies. By @alecmac.bsky.social

I just heard some excellent news regarding one of these datasets - the IMLGS (Index to Marine & Lacustrine Geologic Samples) - SESAR2 (www.geosamples.org) has agreed to host it going forward! 🧪⚒️🌊 This is a super valuable dataset - thanks so much to these colleagues for stepping up.

NEW 🧵 The number of people travelling from Europe to the US in recent weeks has plummeted by as much as 35%, as travellers have cancelled plans in response to Trump’s policies and rhetoric, and horror stories from the border. Story: www.ft.com/content/6dc1...

In the chart published today by the New York Times (Stocks Tumble as Investors Balk at Tariff Plan), “the orange bars indicate weekly losses from end of previous week”. How to do this with Plot? observablehq.com/@recifs/week...

I’m a little late on the #30DayChartChallenge but here goes. Day 1: Fractions. Traditionally the realm of pie charts, but I’ve always thought a waffle plot would be better. And what better dataset to look at than the (pre-DOGE) 2025 U.S. budget! Source: www.usaspending.gov/explorer/bud... 📊

See!

Sentinel-2 reveals the surface deformation after the 2025 #Myanmar #earthquake www.cesbio.cnrs.fr/multitemp/se...

Some great Zines were recently included in the @geographers.bsky.social thanks to the efforts from the GEOZONe collective led by @queergeog.bsky.social

I wrote a short interactive article👆 It uses simulations to demonstrate how different cardiac arrhythmias can develop. Try it out! (It has defibrillators ⚡️) jenevoldsen.com/posts/excitable-cells #medsky #cardiosky #cccsky #emimcc

🇨🇦 ✖️ 🇪🇺 ✖️ 🇷🇺 ✔️ www.economist.com/graphic-deta...

Yes! This map by Brent Jones is a nice solution to a challenging problem. Coloring every building footprint within the Eaton Fire’s perimeter helps emphasize important information by making them pop against the gray (unburned) footprints in the surrounding communities. #dataviz 📊 #cartography 🗺️

DOGE/Musk preferentially cancelled grants and contracts to recipients in counties that voted for Harris in 2024. Among cancellations with election data available, 92.9% and 86.1% cancelled grants and contracts went to Harris counties, representing 96.6% and 92.4% of total dollar amounts.

Most popular car colours by year. Purple and green cars RIP. by reddit user: u/feemiror. Note: data from Poland. www.reddit.com/r/dataisbeau...

I love these! Such a variety of forms achievable with just small parameter tweaks.

I was recently asked to create an Atlas of population diversity for major Spanish municipalities at the census tract level. Who else thinks bivariate maps + scatter plots are a powerhouse combo? Open to suggestions. #rstats #map #barcelona #diversity

Fabulous (but terrifying "Transpolar sea route (future route)") maps of Greenland by @reuters.com www.reuters.com/graphics/GRE... via @cchurchili.bsky.social

Chew (from Atlanta) was playing in our village tonight. *Incredible* energy. 3dchew.com

🚨 New at @civio.es: Spanish prisons use a 30-year-old algorithm to decide on temporary releases ⛓️ We're revealing our 1st investigation on #algorithms in #publicAdministration, fighting to open the "black boxes" ⬛️💥⚖️ ‼️🔍 Now available in English too👇 civio.es/justicia/202...

Poursuite du rétablissement des loups en Europe Les loups continuent de faire un retour remarquable à travers l’Europe, avec une population qui dépasserait les 21 500 individus en 2022, soit une augmentation de 58 % en une décennie journals.plos.org/sustainabili...