Dónal
@pearoid.bsky.social
Urban Planning, GIS and Cartography musings
www.spatialoverlay.xyz
www.spatialoverlay.xyz
Reposted by Dónal
You want to know about this site that lets you explore data collected by the HMS Challenger from 1872–1876, an expedition that laid the foundation of oceanography. 🌊
challenger-expedition.sams.ac.uk/explore
challenger-expedition.sams.ac.uk/explore
December 22, 2025 at 9:50 AM
You want to know about this site that lets you explore data collected by the HMS Challenger from 1872–1876, an expedition that laid the foundation of oceanography. 🌊
challenger-expedition.sams.ac.uk/explore
challenger-expedition.sams.ac.uk/explore
Reposted by Dónal
Galileo 14th launch successful! 🛰️
On 17 December at 05:01 GMT/06:01 CET), Galileo satellites 33-34 were launched from Europe's Spaceport in French Guiana on an Ariane 6 rocket.
🔗 esa.int/Applications/Satellite_navigation/Galileo_s_first_Ariane_6_launch_strengthens_European_resilience
On 17 December at 05:01 GMT/06:01 CET), Galileo satellites 33-34 were launched from Europe's Spaceport in French Guiana on an Ariane 6 rocket.
🔗 esa.int/Applications/Satellite_navigation/Galileo_s_first_Ariane_6_launch_strengthens_European_resilience
December 17, 2025 at 9:56 AM
Galileo 14th launch successful! 🛰️
On 17 December at 05:01 GMT/06:01 CET), Galileo satellites 33-34 were launched from Europe's Spaceport in French Guiana on an Ariane 6 rocket.
🔗 esa.int/Applications/Satellite_navigation/Galileo_s_first_Ariane_6_launch_strengthens_European_resilience
On 17 December at 05:01 GMT/06:01 CET), Galileo satellites 33-34 were launched from Europe's Spaceport in French Guiana on an Ariane 6 rocket.
🔗 esa.int/Applications/Satellite_navigation/Galileo_s_first_Ariane_6_launch_strengthens_European_resilience
Reposted by Dónal
🚀 Good morning all! It's launch day for #Ariane6 #VA266 and Galileo. Watch the launch coverage now on #ESAwebTV2. Liftoff expected at 05:01 GMT/06:01 CET.
📺 watch.esa.int/two/
📺 watch.esa.int/two/
Watch live: Galileo launch on Ariane 6
On 17 December, two Galileo satellites will be launched on an Ariane 6 rocket from Europe’s Spaceport in French Guiana in the 14th launch of operational satellites for th...
www.esa.int
December 17, 2025 at 4:38 AM
🚀 Good morning all! It's launch day for #Ariane6 #VA266 and Galileo. Watch the launch coverage now on #ESAwebTV2. Liftoff expected at 05:01 GMT/06:01 CET.
📺 watch.esa.int/two/
📺 watch.esa.int/two/
Reposted by Dónal
CASA staff Philyoung Jeong and Dr Duncan Smith have published a new working paper on accessibility to cycle routes in London, examining new cycling indicators for tracking cycle network development, gaps in the network and challenges faced by vulnerable cyclists.
discovery.ucl.ac.uk/id/eprint/10...
discovery.ucl.ac.uk/id/eprint/10...
December 15, 2025 at 1:54 PM
CASA staff Philyoung Jeong and Dr Duncan Smith have published a new working paper on accessibility to cycle routes in London, examining new cycling indicators for tracking cycle network development, gaps in the network and challenges faced by vulnerable cyclists.
discovery.ucl.ac.uk/id/eprint/10...
discovery.ucl.ac.uk/id/eprint/10...
Reposted by Dónal
I’ve created a custom QGIS plugin repository where I share the QGIS plugins I develop. This allows you to install and test the latest plugin versions early, before they are released to the official QGIS Plugin Repository.
🔗 Explore the repository: qgis.gishub.org
#QGIS #Geospatial #OpenSource
🔗 Explore the repository: qgis.gishub.org
#QGIS #Geospatial #OpenSource
December 14, 2025 at 3:59 AM
I’ve created a custom QGIS plugin repository where I share the QGIS plugins I develop. This allows you to install and test the latest plugin versions early, before they are released to the official QGIS Plugin Repository.
🔗 Explore the repository: qgis.gishub.org
#QGIS #Geospatial #OpenSource
🔗 Explore the repository: qgis.gishub.org
#QGIS #Geospatial #OpenSource
Reposted by Dónal
Poignant comment on what we lose from the demise of the letter - as sparked by the news that Denmark’s postal service will stop carrying letters from the end of the year www.ft.com/content/feca...
December 13, 2025 at 9:42 AM
Poignant comment on what we lose from the demise of the letter - as sparked by the news that Denmark’s postal service will stop carrying letters from the end of the year www.ft.com/content/feca...
Reposted by Dónal
Correlation is not causation. Well, not always.
www.economist.com/business/202...
www.economist.com/business/202...
December 11, 2025 at 12:56 AM
Correlation is not causation. Well, not always.
www.economist.com/business/202...
www.economist.com/business/202...
Reposted by Dónal
I just published a new installment of “A Gentle Introduction to GDAL” — Python & the Command Line.
#dataviz #cartography #python #gdal
medium.com/@robsimmon/a...
#dataviz #cartography #python #gdal
medium.com/@robsimmon/a...
A Gentle Introduction to GDAL Part 10: Python & the Command Line
Scripting directly on the command line with Bash or Zsh is relatively straightforward: work out a sequence of commands, then wrap them in a…
medium.com
December 3, 2025 at 6:00 PM
I just published a new installment of “A Gentle Introduction to GDAL” — Python & the Command Line.
#dataviz #cartography #python #gdal
medium.com/@robsimmon/a...
#dataviz #cartography #python #gdal
medium.com/@robsimmon/a...
Reposted by Dónal
🔴 #LiveNow: the pre-launch media briefing for the launch of two #Galileo satellites on Ariane 6 #VA266, on #ESAWebTV until 12:00 CET. (Event in English)
📺 watch.esa.int/two
@euspa.bsky.social @ec.europa.eu @cnes.fr @transport.esa.int @thalesaleniaspace.bsky.social @thalesaleniaspace.bsky.social
📺 watch.esa.int/two
@euspa.bsky.social @ec.europa.eu @cnes.fr @transport.esa.int @thalesaleniaspace.bsky.social @thalesaleniaspace.bsky.social
December 9, 2025 at 10:01 AM
🔴 #LiveNow: the pre-launch media briefing for the launch of two #Galileo satellites on Ariane 6 #VA266, on #ESAWebTV until 12:00 CET. (Event in English)
📺 watch.esa.int/two
@euspa.bsky.social @ec.europa.eu @cnes.fr @transport.esa.int @thalesaleniaspace.bsky.social @thalesaleniaspace.bsky.social
📺 watch.esa.int/two
@euspa.bsky.social @ec.europa.eu @cnes.fr @transport.esa.int @thalesaleniaspace.bsky.social @thalesaleniaspace.bsky.social
Reposted by Dónal
Travel times to healthcare & primary schools across the EU at 100m resolution
You can:
•View drive times to 1 or 3 nearest services.
•Compare 2023 vs 2020 to spot changes.
•Show all grid cells or only populated ones.
•Size cells by population to gauge impacted people.
ec.europa.eu/eurostat/web...
You can:
•View drive times to 1 or 3 nearest services.
•Compare 2023 vs 2020 to spot changes.
•Show all grid cells or only populated ones.
•Size cells by population to gauge impacted people.
ec.europa.eu/eurostat/web...
December 8, 2025 at 5:39 PM
Travel times to healthcare & primary schools across the EU at 100m resolution
You can:
•View drive times to 1 or 3 nearest services.
•Compare 2023 vs 2020 to spot changes.
•Show all grid cells or only populated ones.
•Size cells by population to gauge impacted people.
ec.europa.eu/eurostat/web...
You can:
•View drive times to 1 or 3 nearest services.
•Compare 2023 vs 2020 to spot changes.
•Show all grid cells or only populated ones.
•Size cells by population to gauge impacted people.
ec.europa.eu/eurostat/web...
Reposted by Dónal
The new SAM3 model from Meta is blowing my mind
Shown here: detecting putting greens, pools, and cars in Scottsdale from simple text prompts via Mapbox imagery
R, Shiny, mapgl for the UI; Python backend via @giswqs.bsky.social's segment-geospatial package (thanks Qiusheng!)
Shown here: detecting putting greens, pools, and cars in Scottsdale from simple text prompts via Mapbox imagery
R, Shiny, mapgl for the UI; Python backend via @giswqs.bsky.social's segment-geospatial package (thanks Qiusheng!)
December 8, 2025 at 7:16 PM
The new SAM3 model from Meta is blowing my mind
Shown here: detecting putting greens, pools, and cars in Scottsdale from simple text prompts via Mapbox imagery
R, Shiny, mapgl for the UI; Python backend via @giswqs.bsky.social's segment-geospatial package (thanks Qiusheng!)
Shown here: detecting putting greens, pools, and cars in Scottsdale from simple text prompts via Mapbox imagery
R, Shiny, mapgl for the UI; Python backend via @giswqs.bsky.social's segment-geospatial package (thanks Qiusheng!)
Reposted by Dónal
Discover Monochrome Hachures, a QGIS plugin that turns DEMs into stunning hachure maps! 🗺️ Inspired by @robhawkes’ tutorial, it automates slope-based line styling for beautiful terrain visualisation.
Check it out: github.com/lad-sapienza...
#QGIS #Cartography #Mapping
Check it out: github.com/lad-sapienza...
#QGIS #Cartography #Mapping
December 5, 2025 at 11:48 AM
Discover Monochrome Hachures, a QGIS plugin that turns DEMs into stunning hachure maps! 🗺️ Inspired by @robhawkes’ tutorial, it automates slope-based line styling for beautiful terrain visualisation.
Check it out: github.com/lad-sapienza...
#QGIS #Cartography #Mapping
Check it out: github.com/lad-sapienza...
#QGIS #Cartography #Mapping
Very intereting listen: www.bbc.com/audio/play/m...
BBC Audio | Start the Week | Maps – lost, secret and revealing
James Cheshire, Jerry Brotton and Jenny Uglow, with Tom Sutcliffe.
www.bbc.com
December 5, 2025 at 10:11 AM
Very intereting listen: www.bbc.com/audio/play/m...
Reposted by Dónal
Show this to anyone who thinks everyone used to die at 40
The modal year of death from the evolution of Homo sapiens until the 1940s was 0 - 1 year old.
December 2, 2025 at 9:10 PM
Show this to anyone who thinks everyone used to die at 40
Reposted by Dónal
![Comic. [Two people in front of projected satellite image. A small portion of the image is pixelated squares.] PERSON 1: Wait, when was this imagery taken? Is this censorship the work of the contractor? One of our people? *Foreign actors!?* PERSON 2 with ponytail: Do we know who’s operating a facility at that location? PERSON 1: We can’t find *anything*. [caption] My hobby: Setting up big colored panels in the middle of nowhere as a prank on remote sensing people](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreib6md2yc7x32taznh2u4feo27rltazabjco4fer3c6mni3soe5tfa@jpeg)
December 2, 2025 at 12:13 AM
Very exciting: www.esa.int/Applications...
Sentinel-1D delivers first images: from Antarctica to Bremen
The first high-resolution images have been received from Copernicus Sentinel-1D and were shared publicly for the first time at the European Space Agency’s Ministerial Council, held today in Bremen, Ge...
www.esa.int
December 1, 2025 at 11:49 AM
Very exciting: www.esa.int/Applications...
Reposted by Dónal
The absolute truth from @nigella.bsky.social on panettone
November 29, 2025 at 11:05 PM
The absolute truth from @nigella.bsky.social on panettone
Reposted by Dónal
Day 28 - Black
The Longest Nights (2025)
Polar night (+24 hr night) occurs just beyond the Arctic Circle. This is due to the Earth's gravitational pull on light. The ramp up from just beyond the Arctic Circle 67.4°N (24 hrs) to 67.5°N (11 days) is wild.
#30DayMapChallenge
The Longest Nights (2025)
Polar night (+24 hr night) occurs just beyond the Arctic Circle. This is due to the Earth's gravitational pull on light. The ramp up from just beyond the Arctic Circle 67.4°N (24 hrs) to 67.5°N (11 days) is wild.
#30DayMapChallenge
November 28, 2025 at 9:33 PM
Day 28 - Black
The Longest Nights (2025)
Polar night (+24 hr night) occurs just beyond the Arctic Circle. This is due to the Earth's gravitational pull on light. The ramp up from just beyond the Arctic Circle 67.4°N (24 hrs) to 67.5°N (11 days) is wild.
#30DayMapChallenge
The Longest Nights (2025)
Polar night (+24 hr night) occurs just beyond the Arctic Circle. This is due to the Earth's gravitational pull on light. The ramp up from just beyond the Arctic Circle 67.4°N (24 hrs) to 67.5°N (11 days) is wild.
#30DayMapChallenge
Reposted by Dónal
Your universe is a photocopy of a photocopy of a…
on.ft.com/4ahkNKa
on.ft.com/4ahkNKa
November 27, 2025 at 10:36 PM
Your universe is a photocopy of a photocopy of a…
on.ft.com/4ahkNKa
on.ft.com/4ahkNKa
Reposted by Dónal
#30daymapchallenge | Day 22 Data: Natural Earth | The Great Islands
Earlier this summer I finished this print version of my map from last year depicting our Great Lakes as islands. Been trying to learn more about lighting techniques in Blender—I think this was a big leap forward from 2024 version!
Earlier this summer I finished this print version of my map from last year depicting our Great Lakes as islands. Been trying to learn more about lighting techniques in Blender—I think this was a big leap forward from 2024 version!
November 22, 2025 at 1:20 PM
#30daymapchallenge | Day 22 Data: Natural Earth | The Great Islands
Earlier this summer I finished this print version of my map from last year depicting our Great Lakes as islands. Been trying to learn more about lighting techniques in Blender—I think this was a big leap forward from 2024 version!
Earlier this summer I finished this print version of my map from last year depicting our Great Lakes as islands. Been trying to learn more about lighting techniques in Blender—I think this was a big leap forward from 2024 version!
Reposted by Dónal
How helicopters sketch-out Manhattan. A personal project (with a little story behind) for the #30daymapchallenge learn more about it on my blog: mhinfographics.github.io/maps
November 16, 2025 at 6:17 PM
How helicopters sketch-out Manhattan. A personal project (with a little story behind) for the #30daymapchallenge learn more about it on my blog: mhinfographics.github.io/maps
Reposted by Dónal
Mission confirmed ✅
#CopernicusEU Sentinel-6B is now in orbit and ready to begin its Launch & Early Operations phase with @operations.esa.int. The satellite is ready to continue a decades-long mission to track the height of the planet’s seas – a key measure of climate change.
#CopernicusEU Sentinel-6B is now in orbit and ready to begin its Launch & Early Operations phase with @operations.esa.int. The satellite is ready to continue a decades-long mission to track the height of the planet’s seas – a key measure of climate change.
Sentinel-6B launched to extend record of sea-level rise
The latest guardian of our oceans has taken its place in orbit. The Copernicus Sentinel-6B satellite is now circling Earth, ready to continue a decades-long mission to track the height of the planet’s...
esa.int
November 17, 2025 at 7:14 AM
Mission confirmed ✅
#CopernicusEU Sentinel-6B is now in orbit and ready to begin its Launch & Early Operations phase with @operations.esa.int. The satellite is ready to continue a decades-long mission to track the height of the planet’s seas – a key measure of climate change.
#CopernicusEU Sentinel-6B is now in orbit and ready to begin its Launch & Early Operations phase with @operations.esa.int. The satellite is ready to continue a decades-long mission to track the height of the planet’s seas – a key measure of climate change.
Reposted by Dónal
![4-panel vertical comic. (1) 100 Years Ago [two people standing next to bicycle with small car nearby] PERSON 1: It’s too dangerous riding a bike with these cars around. I should get a car, too. (2) 50 Years Ago [two people between smaller car and bigger car] PERSON 2 with short hair: Small cars are less safe in collisions with larger vehicles, so I should get a bigger one. (3) Today [two people between big car and even bigger car] PERSON 1: Everyone has huge SUVs now. If I don’t get the biggest one, I’m putting my family at risk. (4) Soon [two people next to large armored car with spiked clubs attached] PERSON 2: If I don’t install more whirling spike clubs, I’ll be destroyed by all the other drivers who...](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreiby6can6k76yzfmv2czxs4pu2l7zie7bqbrpswi7h3ifmiadkuqvu@jpeg)
Reposted by Dónal
I mean we all knew China is building out solar and wind energy on a massive scale. But this 🤯
«The 22m tonnes of steel used to build new wind turbines and solar panels in 2024 would have been enough to build a Golden Gate Bridge on every working day of every week that year.»
«The 22m tonnes of steel used to build new wind turbines and solar panels in 2024 would have been enough to build a Golden Gate Bridge on every working day of every week that year.»
The World Turned Upside Down
The developing world is apparently going to have to do the heavy climate lifting
billmckibben.substack.com
November 13, 2025 at 8:21 PM
I mean we all knew China is building out solar and wind energy on a massive scale. But this 🤯
«The 22m tonnes of steel used to build new wind turbines and solar panels in 2024 would have been enough to build a Golden Gate Bridge on every working day of every week that year.»
«The 22m tonnes of steel used to build new wind turbines and solar panels in 2024 would have been enough to build a Golden Gate Bridge on every working day of every week that year.»
Reposted by Dónal
There are some lovely maps in tomorrow's edition of The Economist, which features our annual World Ahead pullout
www.economist.com/the-world-ah...
www.economist.com/the-world-ah...
November 13, 2025 at 1:59 PM
There are some lovely maps in tomorrow's edition of The Economist, which features our annual World Ahead pullout
www.economist.com/the-world-ah...
www.economist.com/the-world-ah...