#fossgis — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #fossgis, aggregated by home.social.
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Which Calgary neighborhoods are best built to withstand summer heatwaves? 🌳☀️
To measure structural climate resilience across the city, I conducted a spatial analysis of 193 established residential communities, calculating the Solid-to-Tree Ratio—comparing bare artificial surfaces (asphalt, concrete, rooftops) directly against total tree canopy area.
Here are the Top 10 most shade-rich and climate-resilient communities in Calgary:
🟢 Queens Park Village — 0.3 (Just 0.3 ha of hard surface for every 1 ha of canopy!)
🟢 Discovery Ridge — 0.5
🟢 Roxboro — 0.5
🟢 Wildwood — 0.6
🟢 Rideau Park — 0.7
🟢 Medicine Hill — 0.8
🟢 Upper Mount Royal — 0.8
🟢 Crestmont — 0.9
🟢 Elbow Park — 0.9
🟢 Shaganappi — 0.9👇 The full interactive dataset and study are here:
https://www.datastory.org.ua/calgarys-microclimatic-anatomy-what-lies-beneath-the-citys-green-appearance/#UrbanAnalytics #GeospatialData #RemoteSensing #GIS #UrbanForestry #CityPlanning #Calgary #DataScience #Microclimate #MachineLearning #GreennessOfCalgary #RStats #FOSSGIS
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🌿 Can trees cool #Calgary ? Summer 2025 data from 193 neighborhoods reveals a tipping point: 0.34 NDVI.
🔹 Below 0.34: Isolated trees in "concrete jungles" provide ~0 cooling ROI.
🔹 Above 0.34: Cooling "clicks in" & efficiency jumps.
Stats: Vegetation explains 40% of heat; 60% is locked in asphalt & design. Where we can't plant, we must use high-albedo materials.
Validated by Davies test. Part of my broader #YYC microclimate suite.Link to the previous stage of research:
https://www.datastory.org.ua/calgarys-summer-heat-a-2025-satellite-perspective/#DataScience #ClimateAction #RemoteSensing #RStats #GreennesOfCalgary #Alberta #Calgary #fossgis #ClimateSolutions
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It is a common belief that higher elevations are naturally cooler. In pristine landscapes, this rule holds firm. But what about urban environments? Humanity moves vast amounts of matter and energy, sometimes fundamentally altering the thermodynamic parameters of our habitat.
🛰️ I correlated summer Land Surface Temperature (LST) data across Calgary’s neighborhoods with the Canadian Medium-Resolution Digital Elevation Model (MRDEM). The chart below illustrates the relationship between "Average Elevation" and "Average Surface Temperature" specifically for established residential communities. As observed, this relationship is notably weak, even though a slight cooling trend persists. Based on my data analysis, elevation above sea level is not a key factor in cooling the city.
#Calgary #OpenData #UrbanHeat #DataScience #ClimateAction #YYC #GreennesOfCalgary #ClimateEquity #EnvironmentalEquity #CityPlanning #RemoteSensing #RStats #Landsat #fossgis #DigitalElevationModel
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💻 I took several completely independent datasets and "pitted" them against each other. One of the results is shown in this chart: the more "concrete" (roads, buildings, parking lots) my machine learning model identified in a community, the higher the surface temperature recorded by the thermal sensor.
🔥 The result: Data from different sources confirm one another. The difference in surface temperature between "green" and "concrete" residential areas averages 8–10°C throughout the summer. On certain days, this gap is likely even wider.
📉 This chart shows only established residential communities. If industrial zones were included, the trend would be even more dramatic. While modeling errors certainly exist, the overall physical pattern is undeniable.
#Calgary #OpenData #UrbanHeat #LULC #DataScience #ClimateAction #YYC #GreennesOfCalgary #ClimateEquity #EnvironmentalEquity #CityPlanning #MachineLearning #RemoteSensing #RStats #Sentinel1 #Sentinel2 #Landsat #fossgis
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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
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Der Weg zum Digitalen Zwilling: 3D Tiles mit Open Source 💪
Martin Alzueta teilt gleich auf der #FOSSGIS2026 praxisnahe Erfahrungen aus einem echten Digital-Twin-Projekt:
• GLB/OBJ & LAS/LAZ inkl. Stolpersteine
• CityGML: LoD2-Gebäudedaten
• Performance-Check: Nur Open Source!📅 Do, 26. März | 14:15 Uhr - gleich!
📍 Raum HS3 (ZHG 009)👉 https://pretalx.com/fossgis2026/talk/GUQWRF/
#3DTiles #DigitalTwin #PointClouds #WebGIS #OpenSource #FOSSGIS
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Der Weg zum Digitalen Zwilling: 3D Tiles mit Open Source 💪
Martin Alzueta teilt gleich auf der #FOSSGIS2026 praxisnahe Erfahrungen aus einem echten Digital-Twin-Projekt:
• GLB/OBJ & LAS/LAZ inkl. Stolpersteine
• CityGML: LoD2-Gebäudedaten
• Performance-Check: Nur Open Source!📅 Do, 26. März | 14:15 Uhr - gleich!
📍 Raum HS3 (ZHG 009)👉 https://pretalx.com/fossgis2026/talk/GUQWRF/
#3DTiles #DigitalTwin #PointClouds #WebGIS #OpenSource #FOSSGIS
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Der Weg zum Digitalen Zwilling: 3D Tiles mit Open Source 💪
Martin Alzueta teilt gleich auf der #FOSSGIS2026 praxisnahe Erfahrungen aus einem echten Digital-Twin-Projekt:
• GLB/OBJ & LAS/LAZ inkl. Stolpersteine
• CityGML: LoD2-Gebäudedaten
• Performance-Check: Nur Open Source!📅 Do, 26. März | 14:15 Uhr - gleich!
📍 Raum HS3 (ZHG 009)👉 https://pretalx.com/fossgis2026/talk/GUQWRF/
#3DTiles #DigitalTwin #PointClouds #WebGIS #OpenSource #FOSSGIS
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Der Weg zum Digitalen Zwilling: 3D Tiles mit Open Source 💪
Martin Alzueta teilt gleich auf der #FOSSGIS2026 praxisnahe Erfahrungen aus einem echten Digital-Twin-Projekt:
• GLB/OBJ & LAS/LAZ inkl. Stolpersteine
• CityGML: LoD2-Gebäudedaten
• Performance-Check: Nur Open Source!📅 Do, 26. März | 14:15 Uhr - gleich!
📍 Raum HS3 (ZHG 009)👉 https://pretalx.com/fossgis2026/talk/GUQWRF/
#3DTiles #DigitalTwin #PointClouds #WebGIS #OpenSource #FOSSGIS
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Der Weg zum Digitalen Zwilling: 3D Tiles mit Open Source 💪
Martin Alzueta teilt gleich auf der #FOSSGIS2026 praxisnahe Erfahrungen aus einem echten Digital-Twin-Projekt:
• GLB/OBJ & LAS/LAZ inkl. Stolpersteine
• CityGML: LoD2-Gebäudedaten
• Performance-Check: Nur Open Source!📅 Do, 26. März | 14:15 Uhr - gleich!
📍 Raum HS3 (ZHG 009)👉 https://pretalx.com/fossgis2026/talk/GUQWRF/
#3DTiles #DigitalTwin #PointClouds #WebGIS #OpenSource #FOSSGIS
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#OpenStreetMap – Projektraum #Devroom @FrOSCon sucht weitere Unterstützung durch #OSMAktive für Einführungen und Workshops, bitte auf Wikiseite eintragen: https://wiki.openstreetmap.org/wiki/FrOSCon_2025 oder
@rudzick @falcius fragen.Das #OSM - #FrOSCon2025 - Team freut sich auf interessierte Teilnehmende.
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Du hast Fragen zu #OpenStreetMap?
Triff #OSMAktive am #OSM -Stand auf der #MakerFaireHannover vom 23.+24. August.
Wir freuen uns auch in diesem Jahr Teil des Events voller kreativer, spannender Projekte, Vorträge und Workshops zu sein!
Kommt vorbei, besucht uns am OSM-Stand mit Standnummer 48 (Niedersachsenhalle) & laßt uns gemeinsam eine großartige Zeit haben, austauschen und inspirieren!
Wir freuen uns schon euch in Hannover zu sehen!
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Du hast Fragen zu #OpenStreetMap?
Triff #OSMAktive am #FOSSGIS - #OSM -Stand auf der #frOSCon2025 -
Es ist doch nur Software - warum beschafft die öffentliche Hand nicht mehr #FOSS? #DigitaleSouveränität #fossgis23 #fossgis #osba
https://media.ccc.de/v/fossgis2023-23732-es-ist-doch-nur-software-warum-beschafft-die-ffentliche-hand-nicht-mehr-foss-
