I made a map of 3.4 million Bluesky users - see if you can find yourself! bluesky-map.theo.io I've seen some similar projects, but IMO this seems to better capture some of the fine-grained detail

Pedestrian Observations: Against Free Buses pedestrianobservations.com/2026/02/19/a...

Me aventurei na rede ao lado de fazer um react desmentindo o Kim Kataguiri. Essa galera vive de espalhar mentiras e absurdos. Quem quiser prestigiar. De um oi por lá também! www.instagram.com/p/DU8ISXEjuht/

Great piece from @dsquareddigest.bsky.social, which touches on one of the big theories for why English-speaking countries do especially badly at housebuilding: Adversarial and litigious common law systems (Anglo) vs judge-led civil law systems elsewhere. samf.substack.com/p/build-the-...

@Eurostat published a #map showing accessibility to healthcare and education services in Europe: link.europa.eu/TMxdbb Explore the map: link.europa.eu/QWbyBX #gis #cartography #gischat #demography @ec.europa.eu @nosservicespublics.bsky.social

#r5rgui v0.2 for r5r (@urbandemog.bsky.social) New: - compare routes and transport modes - compare networks! (e.g. OSM vs official streets Trafikverket.se) - query speed - custom basemaps (via `mapgl` @kylewalker.bsky.social ) Still in one line of code! www.ekotov.pro/r5rgui/ #rstats #gischat

Network map of Bluesky users flowingdata.com/2026/02/11/n...

Very intesting-looking new literature review article on how to define minimum levels of necessary mobility doi.org/10.1016/j.er...

It's easy to feel overwhelmed by the current pace of change in technology. A useful counterpoint: There are STILL organizations using ArcMap for their GIS even though ArcGIS Pro has been out for over a decade. Technology moves fast; capacity for adoption, not always.

This looks super cool

Spatial patterns of access-density mismatch reveal infrastructure gaps and strategic opportunities for new housing

📃 "Navigating the urban fringe: Socially embedded adaptation of informal transportation amid Bogotá’s urban gondola investment" ✍️ M. A. Santana Palacios 🔍 What are the dominant social dimensions that shape adaptation of informal #transportation to urban change? 📖 buff.ly/Hl9xdyF

🚨 kuzco is now on CRAN 🚨 cran.r-project.org/web/packages...

Amazing chart, it tells so many different things. but overall, it suggests that raising female education reduces fertility more sharply when labour markets and social welfare systems provide less support for motherhood. Paper: link.springer.com/content/pdf/..., via @johnholbein1.bsky.social

Publicada hoje a primeira pesquisa científica e independente sobre as Motofaixas de SP! Nunes transformou a ideia fraca em marketing político muito antes dela ser comprovada. A pesquisa mostrou que elas aumentam a velocidade e com isso o risco de mortes, e aumentaram as mortes no trânsito!

It's 2024 5-year American Community Survey release day! The ACS is the best resource for small-area analysis of US demographics. In R, use tidycensus and mapgl to dive into the data right now. Copy-paste the code below for an interactive income map with a legend filter:

41 miles of new subway for the cost of free buses. Here’s an audacious, expansive plan to expand the subway’s reach & catalyze housing to attack the affordability crisis. An incredible effort from NYU Marron team. Excited for this to be out in the world: www.nytimes.com/2026/01/30/n...

We deserve to live until we are old. substack.com/home/post/p-... #publichealth #demography #epidemiology #healthpolicy

👏 Congratulations to political philosopher Nancy Fraser, the Spring 2026 Senior Loeb Scholar! Senior Loeb Scholars spend time on campus, during which time they present a public lecture and engage directly with GSD students, faculty, staff, researchers, and Loeb Fellows. https://hgsd.us/4a0NN7g

If you’re in Boston in early March, don’t miss the Urban Mobility and Climate Change Conference. More info and registration available here: www.hks.harvard.edu/centers/cid/... I’ll be speaking on urban form and sustainable mobility, alongside a stellar lineup of speakers addressing ....

a phd

This is how quickly Ai-assisted code is being adopted on GitHub repositories. In just four years , the share of Ai-generated code in the US goes from negligible to aprox 30% by the end of 2024 www.science.org/doi/10.1126/... Really cool paper by Frank Neffke et al in @science.org

Vignette: solving facility location problems with realistic travel-times. Use the r5 routing engine to generate a travel-time cost matrix from OSM data, then optimize facility locations with a lightning-fast Rust backend in spopt-r. Learn how: walker-data.com/spop...

Isso é maravilhoso

This was fun! I just posted all the links and resources we talked about at www.andrewheiss.com/blog/2026/01... - check it out to learn more about Raycast, Espanso, and neat Positron/VS Code extensions like Peacock and Pastum and Project Manager #rstats #databs

A spokesperson for T&F said “Researchers should be free to communicate their work in the journal that best suits their research, and proposing to cap [open access] funding threatens that freedom to publish." Bold move to set prices high and then complain about freedom when people can't pay.

📢{duckspatial} v0.9.0 is now on CRAN !! 🚀 If you work with big spatial data in #rstats, duckspatial brings the power of @duckdb.org to spatial analysis in R. It is dozenz - 📦website cidree.github.io/duckspatial/ - Blog post: adrian-cidre.com/posts/014_du... #duckspatial #rspatial #duckdb

#rstats {duckspatial} 0.9 is on CRAN, makes @duckdb.org 🦆 #spatial 🌍 more user-friendly, enabling faster big data spatial ops in R. Adrián Cidree shared a great breakdown of how we (+ @urbandemog.bsky.social) are doing it: ​📖: cidree.github.io/duckspatial/... 💻: github.com/Cidree/ducks... ​#rspatial

Since I started developing the mapgl R package I've envisioned built-in interactive legends. They're finally here in the upcoming package release: a filter slider for continuous legends, and click-to-filter for categorical legends. Blog post coming this week!

can't wait to try it! Another great contribution by @kylewalker.bsky.social !

Spatial optimization has applications in nearly every field but it's underutilized. In 2026, I'm working on open source and lightning-fast tools to make spatial optimization accessible. Shown: interactively solving a "location-allocation" problem in an app with instant results.

These are 10 of my favourite #UrbanEconomics & #SpatialEconomics articles published in academic journals in 2025, continuing with a tradition started in 2018 (order is alphabetical by first author, no ranking implied):

When Are Impedance Choices Irrelevant? Equivalence Conditions for Hansen-Style Access Metrics

2025 was a massive year for me as an R developer. This past year I've branched out and focused on bringing interfaces to some of the most exciting geospatial technologies to the R community. Here's a summary:

space duck! no need to tell me more

Working with big spatial data in #rstats? #duckspatial 🦆

looking for a good overview/tutorial (text or video) on MCPs and code agents for #rstats / Positron (and maybe Claude Code) so I can see how that world is shaping up—any good ones out there?

Working with big spatial data sets in #rstats? You should try {duckspatial}. The dev version of #duckspatial (soon on CRAN) uses #duckdb to perform super fast and memory efficient spatial operations cidree.github.io/duckspatial/... In a benchmark against, {sf}....

My favorite #Python package to use is spopt, a library for spatial optimization. It helps you with: 📊 Facility location planning; 📊 Sales territory design; 📊 Maximizing market share; And much more! Check it out here: pysal.org/spopt/

🚀 Watch the Earth Change: New QGIS Plugin Creates Satellite Timelapse Animations in Seconds 🌍 A QGIS plugin for creating timelapse animations from satellite and aerial imagery using Google Earth Engine. Supports NAIP, Landsat, Sentinel-2, Sentinel-1, MODIS NDVI, and GOES weather satellite imagery.

Bivariate maps showing the relationships between Temperature and Precipitation. Made with Plot, based on a great tutorial by Fil: observablehq.com/@jo... Data from TerraClimate (1958-present). #cartography #maps #mapping #climate #dataviz #SciArt

How the magnitude of the causal effect of a policy (z) on the outcome variable varies over time (x) and distance to policy location (y) #dataporn

Absolutely brilliant!

How the magnitude of the causal effect of a policy (z) on the outcome variable varies over time (x) and distance to policy location (y) #dataporn

An astonishing percentage of Americans are open to car-free living. The problem isn't attitudes. The problem is the failure to invest in viable options. humantransit.org/2025/12/many...

Transcribed over 7,000 folios of eighteenth-century merchant letters with @leotranscribes.bsky.social. Now I just need to read them... 😅