CIRCLE WITH A DOT

Here is the data analysis for Calgary, Summer 2025. This chart shows the relationship between vegetation density (NDVI) and Land Surface Temperature (LST). The data reveals a critical "tipping point": vegetation only starts effectively cooling the environment once it reaches a specific density threshold. Below this threshold (the left side of the curve), green spaces stay just as hot as the surrounding concrete.Sparse or isolated trees don't act as air conditioners—they "burn" in the urban furnace right along with us. What does this mean for Calgary? Simply planting a few scattered trees isn't enough. To actually move the needle on temperature, we need dense, healthy green belts. Otherwise, it’s just a waste of water and resources. Link to the research: https://www.datastory.org.ua/calgarys-summer-heat-a-2025-satellite-perspective/#Calgary #UrbanHeatIsland #NDVI #ClimateChange #UrbanPlanning #DataScience #Environment #YYC #BigData #ScienceMatters #GreennessOfCalgary #ClimateOfCalgary #rstats #RemoteSensing #OpenScience

I've seen some nudges to migrate away from github. #rstats lazyweb, is there anything like devtools::install_github() for repositories on codeberg?

How hot was Calgary's neighborhood in 2025? ️️I processed satellite data from last summer to see how Calgary’s communities handle the heat. It turns out that not all greenery is equal. My research shows a clear "breakpoint" where the density of vegetation actually starts to drop the surface temperature.I’ve mapped the "Hottest" and "Coolest" communities — see where yours stands and why some "green" areas are still overheating.Full article and maps here:https://www.datastory.org.ua/calgarys-summer-heat-a-2025-satellite-perspective/#RemoteSensing #Rstats #GreennesOfCalgary #ClimateOfCalgary #OpenData #FOSSGIS #ClimateResilence #Landsat #Sentinel2 #Calgary #Alberta #Canada #YYC #LST #NDVI

"No, YOU'RE non-positive definite!"-- Me to my computer every 7 minutes when running models#rstats #lavaan #dataanalysis #statistics

@Posit This is new to me--cool!

I'm going to need Hadley Wickham to make up his mind.early 00s - 2020s: recoding with dplyr is annoying; just use car::recode()2020s: dplyr::recode() happens, breaking bazillions of scripts, functions, and analyses2024: dplyr::recode() is deprecated; use case_match or case_when instead; it's way better except that you I have no idea why it was better, I just had to learn a new syntax form. I think many people just went back to car::recode(), at this point 2026: Now apparently case_match() is deprecated, and we're supposed to use a new function: recode_values(). I'll go learn about it when I have time. Can we please just let this one stick around a few years? This isn't some esoteric, rare function; this is every day. All the time. Every time this breaks, it costs me hours of my life and comes back to cost me more hours in future years. as older, now-broken code refuses to work when I want to use it, and I spend an hour debugging before I remember.#rstats #complaints #deprecated #tidyverse

@djnavarro I suppose you're now going to tell me that those points are actually a Poisson process.

Introducing the Rome R Users GroupA new community for people using #RStats in Rome — from statistics and research to data science and real-world applications.We’re building a space for learning, networking, and collaboration. Intro video:https://youtu.be/e8eX3b29BTo#DataScience #OpenSource #Rome #RProgramming

️ 242 Million Pixels: Calgary’s Urban Heat PulseTo model Calgary’s #UHI with precision, I processed 242,376,352 pixels from Sentinel-2 & Landsat 8/9 (Summer 2025).Using multi-temporal composites in #RStats on #Debian, I’ve revealed the persistent link between greenery & heat. Data shows that NDVI > 0.35 triggers a sharp drop in surface temp.This is a foundational layer for my Multi-Dimensional Environmental Matrix (#MDEM) framework for #UrbanHealth.#Calgary #GIS #RemoteSensing #Sustainability #yyc #ClimateResilience #GreennessOfCalgary

Saturday Data Dive: Mapping Calgary’s Thermal Fingerprint ️Spent some quality time with GEE, R and Landsat-8/9 data today.I’ve just finished processing a Median Land Surface Temperature (LST) model for Calgary, covering the entire Summer of 2025. This isn't just a single-day snapshot—it’s a robust composite of many satellite scenes, filtered to show the true intra-urban thermal zones.Quick Takeaways: Surface temperature in some busines area and "heat traps" peaked at over 51.3°C. The contrast between our "Cool Islands" and "Extreme Heat Zones" is striking. This automated workflow in R allows for a granular look at urban climate resilience that standard reports often miss.I’m currently finalizing a full breakdown and a community-by-community analysis.Stay tuned—the detailed article is coming soon!#Calgary #DataScience #UrbanHeatIsland #RemoteSensing #ClimateResilience #Landsat #RStats #GIS #Sustainability #GEE #EnvironmentalData #Summer2025 #YYC #GreennessOfCalgary #Alberta #Canada

We are hiring a full-time data scientist at Grant Witness, our project to track grant terminations and changes to U.S. Federal funding for the sciences and public health. We also have upcoming part-time/contract positions.It's a great team and making real impacts. We're scraping government and court data, re-assembling it, doing forensic analysis and providing data and analysis for activism, journalism, and litigation. Join us! https://grant-witness.us/apply.html#RStats #getFediHired

Introducing population tiles of France.#rayshader adventures, an #rstats tale

Did this a while back but forgot to share: the Danube basin.#rayshader adventures, an #rstats tale