Rafael H. M. Pereira 🚑 Urban Demographics
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urbandemog.bsky.social
Rafael H. M. Pereira 🚑 Urban Demographics
@urbandemog.bsky.social

Researcher Ipea Brazil | Visiting prof @geo_uoft | PhD @TSUOxford | Structured procrastination on Cities, Urban mobility, Accessibility, Equity, Data science, R. About: www.urbandemographics.org/

Engineering 29%
Economics 25%
Pinned
New preprint where we propose "Rethinking Congestion as Lost Access"
πŸ“‘ osf.io/fjdbs_v2 Short 🧡!
A spokesperson for T&F said β€œResearchers 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.
Rising Publication Costs Strain Researchers
Open access publishing has led to researchers paying thousands of dollars to publish their work, limiting funds for research and leaving scientists with hard choices.
www.the-scientist.com

Reposted by Martin Tomko

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

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!
#rstats {duckspatial} 0.9 is on CRAN, makes @duckdb.org πŸ¦† #spatial 🌍 more user-friendly, enabling faster big data spatial ops in R. AdriΓ‘n Cidree shared a great breakdown of how we (+ @urbandemog.bsky.social) are doing it:
β€‹πŸ“–: cidree.github.io/duckspatial/...
πŸ’»: github.com/Cidree/ducks...
​#rspatial
Intro to duckspatial
cidree.github.io

can't wait to try it! Another great contribution by @kylewalker.bsky.social !
Announcing spopt-r: spatial optimization for regionalization, facility location, and market analysis in R.

My all-time favorite Python package is PySAL's spopt - and until now, it did not have an R equivalent.

Get started here: walker-data.com/spopt-r

Announcing spopt-r: spatial optimization for regionalization, facility location, and market analysis in R.

My all-time favorite Python package is PySAL's spopt - and until now, it did not have an R equivalent.

Get started here: walker-data.com/spopt-r

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
When Are Impedance Choices Irrelevant? Equivalence Conditions for Hansen-Style Access Metrics
Recently published:
dlvr.it
[ 1/31 ] 🧡

Time for yet another megathread of my favourite satellite pics.

This time I have 123 images processed by me in 2025 *.

Various dates, random places.

Most of them were taken by Sentinel-2, some by S-3 and one or two by Landsat.

*There's one more pic that isn't mine, but it's so good 😊
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:
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 upβ€”any good ones out there?

In a benchmark performing a spatial join between 10 million points and 257 polygons, {duckspatial} was 9x faster and used 5x less RAM than {sf}.
#duckspatial is bringging the power of #duckdb to #rspatial