ARGOS
@argos-geo.org
Current project: open-source digital twin of Kefalonia, Greece
*The map that argues back*
| https://argos-geo.org
| github.com/argos-geo
: : [email protected]
*The map that argues back*
| https://argos-geo.org
| github.com/argos-geo
: : [email protected]
Pinned
ARGOS
@argos-geo.org
· Aug 14
Kefalonia has stunning beaches, great wine and zero real-time geospatial infrastructure. I'm fixing one of those.
Meet ARGOS-not a beach, not a great wine but an open source digital twin for the entire island- Built in public, with a full-time job, because someone has to.
1/4
Meet ARGOS-not a beach, not a great wine but an open source digital twin for the entire island- Built in public, with a full-time job, because someone has to.
1/4
This week ARGOS moved to its own server.
48 hours of soak testing, passed.
Every road and building on the island now serves from production.
The stack is unchanged.
The twin never sleeps anymore.
: : argos-geo.org/map
48 hours of soak testing, passed.
Every road and building on the island now serves from production.
The stack is unchanged.
The twin never sleeps anymore.
: : argos-geo.org/map
ARGOS : : Kefalonia Digital Twin
Interactive digital twin map of Kefalonia. 12,217 roads, 22,013 buildings, 197 beaches, wildfire risk layers, flood screening, and evacuation routing. Open source and free.
argos-geo.org
September 21, 2026 at 6:30 PM
This week ARGOS moved to its own server.
48 hours of soak testing, passed.
Every road and building on the island now serves from production.
The stack is unchanged.
The twin never sleeps anymore.
: : argos-geo.org/map
48 hours of soak testing, passed.
Every road and building on the island now serves from production.
The stack is unchanged.
The twin never sleeps anymore.
: : argos-geo.org/map
In Build Log #4 we admitted a structural blind spot: at Livadi, the February 2025 flood was rain pooling on flat ground, invisible to any flow-accumulation model.
We promised a pluvial term in v1.1.
Flood model v1.1 is live.
We promised a pluvial term in v1.1.
Flood model v1.1 is live.
September 19, 2026 at 4:21 PM
In Build Log #4 we admitted a structural blind spot: at Livadi, the February 2025 flood was rain pooling on flat ground, invisible to any flow-accumulation model.
We promised a pluvial term in v1.1.
Flood model v1.1 is live.
We promised a pluvial term in v1.1.
Flood model v1.1 is live.
Six years ago this week, Medicane Ianos made landfall on Kefalonia. A Mediterranean hurricane: over 750 mm of rain in 48 hours, the worst natural disaster on the island since the 2014 earthquakes.
The documented damage reads like a case file for the map we are building.
1/6
The documented damage reads like a case file for the map we are building.
1/6
September 18, 2026 at 6:57 PM
Six years ago this week, Medicane Ianos made landfall on Kefalonia. A Mediterranean hurricane: over 750 mm of rain in 48 hours, the worst natural disaster on the island since the 2014 earthquakes.
The documented damage reads like a case file for the map we are building.
1/6
The documented damage reads like a case file for the map we are building.
1/6
I asked my digital twin how long it takes to evacuate Fiskardo by road.
It said 44 minutes.
I didn't want that answer, so I tried to break it.
Six bugs later, it still said 44 minutes.
It said 44 minutes.
I didn't want that answer, so I tried to break it.
Six bugs later, it still said 44 minutes.
September 17, 2026 at 3:47 PM
I asked my digital twin how long it takes to evacuate Fiskardo by road.
It said 44 minutes.
I didn't want that answer, so I tried to break it.
Six bugs later, it still said 44 minutes.
It said 44 minutes.
I didn't want that answer, so I tried to break it.
Six bugs later, it still said 44 minutes.
Yesterday we shipped three risk layers for Kefalonia.
Today the wildfire layer took its first independent exam.
We crossed 25 years of NASA FIRMS fire detections, 397 points across the island, with our risk classes.
This time, the model didn't get to mark its own homework.
Today the wildfire layer took its first independent exam.
We crossed 25 years of NASA FIRMS fire detections, 397 points across the island, with our risk classes.
This time, the model didn't get to mark its own homework.
September 16, 2026 at 2:06 PM
Yesterday we shipped three risk layers for Kefalonia.
Today the wildfire layer took its first independent exam.
We crossed 25 years of NASA FIRMS fire detections, 397 points across the island, with our risk classes.
This time, the model didn't get to mark its own homework.
Today the wildfire layer took its first independent exam.
We crossed 25 years of NASA FIRMS fire detections, 397 points across the island, with our risk classes.
This time, the model didn't get to mark its own homework.
New layers just landed on the ARGOS map.
Wildfire risk. Flood risk. Fire-response coverage.
The interesting part isn't only what the map shows, but how we know.
Every layer is bilingual and comes with its own evidence notes.
Wildfire risk. Flood risk. Fire-response coverage.
The interesting part isn't only what the map shows, but how we know.
Every layer is bilingual and comes with its own evidence notes.
September 15, 2026 at 8:09 PM
New layers just landed on the ARGOS map.
Wildfire risk. Flood risk. Fire-response coverage.
The interesting part isn't only what the map shows, but how we know.
Every layer is bilingual and comes with its own evidence notes.
Wildfire risk. Flood risk. Fire-response coverage.
The interesting part isn't only what the map shows, but how we know.
Every layer is bilingual and comes with its own evidence notes.
In February 2025, a storm turned Kefalonia's dry valleys into rivers.
In Peratata, a speedboat was deployed to rescue residents.
It was the worst flooding there in 60 years.
Afterward, I ran the ARGOS drainage model against the storm reports.
In Peratata, a speedboat was deployed to rescue residents.
It was the worst flooding there in 60 years.
Afterward, I ran the ARGOS drainage model against the storm reports.
September 14, 2026 at 5:13 PM
In February 2025, a storm turned Kefalonia's dry valleys into rivers.
In Peratata, a speedboat was deployed to rescue residents.
It was the worst flooding there in 60 years.
Afterward, I ran the ARGOS drainage model against the storm reports.
In Peratata, a speedboat was deployed to rescue residents.
It was the worst flooding there in 60 years.
Afterward, I ran the ARGOS drainage model against the storm reports.
A map is usually treated as the final product.
For ARGOS, it’s more like the beginning.
The interesting part isn’t seeing a road, a building, a beach or a wildfire-risk layer on a screen.
It’s asking what happens when you connect them.
For ARGOS, it’s more like the beginning.
The interesting part isn’t seeing a road, a building, a beach or a wildfire-risk layer on a screen.
It’s asking what happens when you connect them.
September 13, 2026 at 11:05 PM
A map is usually treated as the final product.
For ARGOS, it’s more like the beginning.
The interesting part isn’t seeing a road, a building, a beach or a wildfire-risk layer on a screen.
It’s asking what happens when you connect them.
For ARGOS, it’s more like the beginning.
The interesting part isn’t seeing a road, a building, a beach or a wildfire-risk layer on a screen.
It’s asking what happens when you connect them.
Reposted by ARGOS
Every charted navigational light on the coast of New Zealand, each on its own flashing character. From Cape Reinga down to Stewart Island and out east to the Chatham Islands, so near the dateline they meet the new day first. Light data: OpenSeaMap / OpenStreetMap and the NGA List of Lights.
September 10, 2026 at 8:00 AM
Every charted navigational light on the coast of New Zealand, each on its own flashing character. From Cape Reinga down to Stewart Island and out east to the Chatham Islands, so near the dateline they meet the new day first. Light data: OpenSeaMap / OpenStreetMap and the NGA List of Lights.
A fire-risk map can tell us where the risk is high.
But what happens when we add everything around it?
Settlements. Roads. Terrain. Land cover. Critical infrastructure. Evacuation points. Population. Accessibility.
Suddenly, we're not just looking at a risk layer.
But what happens when we add everything around it?
Settlements. Roads. Terrain. Land cover. Critical infrastructure. Evacuation points. Population. Accessibility.
Suddenly, we're not just looking at a risk layer.
September 10, 2026 at 9:47 AM
A fire-risk map can tell us where the risk is high.
But what happens when we add everything around it?
Settlements. Roads. Terrain. Land cover. Critical infrastructure. Evacuation points. Population. Accessibility.
Suddenly, we're not just looking at a risk layer.
But what happens when we add everything around it?
Settlements. Roads. Terrain. Land cover. Critical infrastructure. Evacuation points. Population. Accessibility.
Suddenly, we're not just looking at a risk layer.
I've been thinking a lot about what a digital twin should actually be.
It doesn't necessarily need to start as a huge platform.
It can start with an island, open data, a map, and a simple question:
What happens when local knowledge and open technology come together?
It doesn't necessarily need to start as a huge platform.
It can start with an island, open data, a map, and a simple question:
What happens when local knowledge and open technology come together?
September 9, 2026 at 10:25 PM
I've been thinking a lot about what a digital twin should actually be.
It doesn't necessarily need to start as a huge platform.
It can start with an island, open data, a map, and a simple question:
What happens when local knowledge and open technology come together?
It doesn't necessarily need to start as a huge platform.
It can start with an island, open data, a map, and a simple question:
What happens when local knowledge and open technology come together?
EFFIS mapped the fires of July-August 2026. Greece is on that map.
ARGOS ran its wildfire risk index against 24 historical EFFIS fires (2017-2026) before this season started.
The model already knew where the risk concentrated. The burns validated it.
ARGOS ran its wildfire risk index against 24 historical EFFIS fires (2017-2026) before this season started.
The model already knew where the risk concentrated. The burns validated it.
September 9, 2026 at 2:49 PM
EFFIS mapped the fires of July-August 2026. Greece is on that map.
ARGOS ran its wildfire risk index against 24 historical EFFIS fires (2017-2026) before this season started.
The model already knew where the risk concentrated. The burns validated it.
ARGOS ran its wildfire risk index against 24 historical EFFIS fires (2017-2026) before this season started.
The model already knew where the risk concentrated. The burns validated it.
Sentinel-3C launches 15 September. More eyes on the Mediterranean.
ARGOS already uses Copernicus Sentinel-2 for vegetation stress and burn scar detection. Sentinel-3 adds thermal and ocean color. The stack gets stronger.
ARGOS already uses Copernicus Sentinel-2 for vegetation stress and burn scar detection. Sentinel-3 adds thermal and ocean color. The stack gets stronger.
September 9, 2026 at 10:56 AM
Sentinel-3C launches 15 September. More eyes on the Mediterranean.
ARGOS already uses Copernicus Sentinel-2 for vegetation stress and burn scar detection. Sentinel-3 adds thermal and ocean color. The stack gets stronger.
ARGOS already uses Copernicus Sentinel-2 for vegetation stress and burn scar detection. Sentinel-3 adds thermal and ocean color. The stack gets stronger.
The highest point on Kefalonia is 1,628 meters of endemic Greek fir. Until last month, ARGOS saw it as a single green pixel.
NDVI on karst limestone is a liar. It gives the same value for stressed fir and bare rock.
NDVI on karst limestone is a liar. It gives the same value for stressed fir and bare rock.
September 9, 2026 at 10:34 AM
The highest point on Kefalonia is 1,628 meters of endemic Greek fir. Until last month, ARGOS saw it as a single green pixel.
NDVI on karst limestone is a liar. It gives the same value for stressed fir and bare rock.
NDVI on karst limestone is a liar. It gives the same value for stressed fir and bare rock.
I needed a geospatial backend for ARGOS. 3 options.
GeoServer: The standard. Java. Heavy. XML configuration.
Martin: Light, fast, Rust. But vector tiles only. No raster queries. No custom API logic.
PostGIS: The database that happens to be a geospatial engine. SQL + Python. I speak both.
GeoServer: The standard. Java. Heavy. XML configuration.
Martin: Light, fast, Rust. But vector tiles only. No raster queries. No custom API logic.
PostGIS: The database that happens to be a geospatial engine. SQL + Python. I speak both.
September 8, 2026 at 7:14 PM
I needed a geospatial backend for ARGOS. 3 options.
GeoServer: The standard. Java. Heavy. XML configuration.
Martin: Light, fast, Rust. But vector tiles only. No raster queries. No custom API logic.
PostGIS: The database that happens to be a geospatial engine. SQL + Python. I speak both.
GeoServer: The standard. Java. Heavy. XML configuration.
Martin: Light, fast, Rust. But vector tiles only. No raster queries. No custom API logic.
PostGIS: The database that happens to be a geospatial engine. SQL + Python. I speak both.
The ARGOS map now has three basemaps.
ARGOS dark is built for the twin: navy land, gold contours, EMODnet bathymetry, Copernicus hillshade.
Satellite is Esri World Imagery. Use it for the real cross-check: is that building actually there? Does that road actually exist?
ARGOS dark is built for the twin: navy land, gold contours, EMODnet bathymetry, Copernicus hillshade.
Satellite is Esri World Imagery. Use it for the real cross-check: is that building actually there? Does that road actually exist?
August 28, 2026 at 8:32 AM
The ARGOS map now has three basemaps.
ARGOS dark is built for the twin: navy land, gold contours, EMODnet bathymetry, Copernicus hillshade.
Satellite is Esri World Imagery. Use it for the real cross-check: is that building actually there? Does that road actually exist?
ARGOS dark is built for the twin: navy land, gold contours, EMODnet bathymetry, Copernicus hillshade.
Satellite is Esri World Imagery. Use it for the real cross-check: is that building actually there? Does that road actually exist?
Reposted by ARGOS
Warming is making extreme wildfires more likely and more severe. ESA’s XFires project aims to gain a holistic understanding of what makes fires extreme, their drivers and their impacts on Earth’s system, helping inform climate models and adaptation policy.
climate.esa.int/en/Cross_ECV...
climate.esa.int/en/Cross_ECV...
August 26, 2026 at 3:16 PM
Warming is making extreme wildfires more likely and more severe. ESA’s XFires project aims to gain a holistic understanding of what makes fires extreme, their drivers and their impacts on Earth’s system, helping inform climate models and adaptation policy.
climate.esa.int/en/Cross_ECV...
climate.esa.int/en/Cross_ECV...
Eurostat: Greece's South Aegean islands see 127 tourist nights for every resident.
I keep thinking about what that number means when the people who need help do not know the island, and the people who know the island do not know where the tourists are.
I keep thinking about what that number means when the people who need help do not know the island, and the people who know the island do not know where the tourists are.
New Eurostat data shows where tourists far outnumber residents, with Greece’s South Aegean recording more than 127 tourist nights for every resident.
Europe’s most tourist-saturated destinations revealed
New Eurostat data shows where tourists far outnumber residents, with Greece’s South Aegean recording more than 127 tourist nights for every resident.
l.euronews.com
August 22, 2026 at 8:55 AM
Eurostat: Greece's South Aegean islands see 127 tourist nights for every resident.
I keep thinking about what that number means when the people who need help do not know the island, and the people who know the island do not know where the tourists are.
I keep thinking about what that number means when the people who need help do not know the island, and the people who know the island do not know where the tourists are.
EFFIS just moved to daily updates.
616,000 hectares burnt in the EU this year.
Double the 20-year average.
Greece is in the Extreme fire danger zone for the next 7 days.
The map that argues back does not show you Greece. It shows you which ridge burns first.
616,000 hectares burnt in the EU this year.
Double the 20-year average.
Greece is in the Extreme fire danger zone for the next 7 days.
The map that argues back does not show you Greece. It shows you which ridge burns first.
August 21, 2026 at 11:52 AM
EFFIS just moved to daily updates.
616,000 hectares burnt in the EU this year.
Double the 20-year average.
Greece is in the Extreme fire danger zone for the next 7 days.
The map that argues back does not show you Greece. It shows you which ridge burns first.
616,000 hectares burnt in the EU this year.
Double the 20-year average.
Greece is in the Extreme fire danger zone for the next 7 days.
The map that argues back does not show you Greece. It shows you which ridge burns first.
ARGOS v0.0.1 is live.
12,217 roads.
22,013 buildings.
1,831 POIs.
197 beaches.
One PostgreSQL database holding an entire Greek island.
Click anything. A building, a beach, a road. It answers. Fire response time. Nearest port. As-the-ambulance-drives, not as-the-crow-flies.
#geospatial #data
12,217 roads.
22,013 buildings.
1,831 POIs.
197 beaches.
One PostgreSQL database holding an entire Greek island.
Click anything. A building, a beach, a road. It answers. Fire response time. Nearest port. As-the-ambulance-drives, not as-the-crow-flies.
#geospatial #data
August 20, 2026 at 3:22 PM
ARGOS v0.0.1 is live.
12,217 roads.
22,013 buildings.
1,831 POIs.
197 beaches.
One PostgreSQL database holding an entire Greek island.
Click anything. A building, a beach, a road. It answers. Fire response time. Nearest port. As-the-ambulance-drives, not as-the-crow-flies.
#geospatial #data
12,217 roads.
22,013 buildings.
1,831 POIs.
197 beaches.
One PostgreSQL database holding an entire Greek island.
Click anything. A building, a beach, a road. It answers. Fire response time. Nearest port. As-the-ambulance-drives, not as-the-crow-flies.
#geospatial #data
The EU just priced this summer's heat at €180 billion.
Meanwhile I'm still trying to answer one question: if a fire starts on that ridge on Kefalonia, how long until the fire truck actually arrives?
Continental frameworks are important. Local granularity is *urgent*
Meanwhile I'm still trying to answer one question: if a fire starts on that ridge on Kefalonia, how long until the fire truck actually arrives?
Continental frameworks are important. Local granularity is *urgent*
Europe's scorching summer could cost EU economies €180 billion
Extreme heat could cost EU economies around €180 billion this year, roughly 1% of GDP and almost exactly the growth the bloc had been expecting for 2026, with France facing the heaviest blow of the big member states.
Extreme heat could cost EU economies around €180 billion this year, roughly 1% of GDP and almost exactly the growth the bloc had been expecting for 2026, with France facing the heaviest blow of the big member states.
Europe's scorching summer could cost EU economies €180 billion
Extreme heat could cost EU economies around €180 billion this year, roughly 1% of GDP and almost exactly the growth the bloc had been expecting for 2026, with France facing the heaviest blow of the big member states.
www.euronews.com
August 19, 2026 at 12:15 PM
The EU just priced this summer's heat at €180 billion.
Meanwhile I'm still trying to answer one question: if a fire starts on that ridge on Kefalonia, how long until the fire truck actually arrives?
Continental frameworks are important. Local granularity is *urgent*
Meanwhile I'm still trying to answer one question: if a fire starts on that ridge on Kefalonia, how long until the fire truck actually arrives?
Continental frameworks are important. Local granularity is *urgent*
Reposted by ARGOS
Sea Surface Temperature is a key variable for monitoring #climatechange.
Watch our tutorial "Sea Surface Temperature Trends Under Climate Change" to learn how to analyse #CopernicusMarine data using Python 👉 https://bit.ly/4hZjgfF
📸: European Union, Copernicus Marine Service Data
Watch our tutorial "Sea Surface Temperature Trends Under Climate Change" to learn how to analyse #CopernicusMarine data using Python 👉 https://bit.ly/4hZjgfF
📸: European Union, Copernicus Marine Service Data
August 19, 2026 at 9:59 AM
Sea Surface Temperature is a key variable for monitoring #climatechange.
Watch our tutorial "Sea Surface Temperature Trends Under Climate Change" to learn how to analyse #CopernicusMarine data using Python 👉 https://bit.ly/4hZjgfF
📸: European Union, Copernicus Marine Service Data
Watch our tutorial "Sea Surface Temperature Trends Under Climate Change" to learn how to analyse #CopernicusMarine data using Python 👉 https://bit.ly/4hZjgfF
📸: European Union, Copernicus Marine Service Data
ARGOS ran its first road accessibility analysis across Kefalonia.
Hardest place to reach? Alighthouse on Vardiani islet that was built by the British in 1824, bombed by the Italians in 1942 and flattened by the 1953 earthquakes. Accessible only by boat.
#opensource #digitaltwin #kefalonia
Hardest place to reach? Alighthouse on Vardiani islet that was built by the British in 1824, bombed by the Italians in 1942 and flattened by the 1953 earthquakes. Accessible only by boat.
#opensource #digitaltwin #kefalonia
August 18, 2026 at 9:27 AM
ARGOS ran its first road accessibility analysis across Kefalonia.
Hardest place to reach? Alighthouse on Vardiani islet that was built by the British in 1824, bombed by the Italians in 1942 and flattened by the 1953 earthquakes. Accessible only by boat.
#opensource #digitaltwin #kefalonia
Hardest place to reach? Alighthouse on Vardiani islet that was built by the British in 1824, bombed by the Italians in 1942 and flattened by the 1953 earthquakes. Accessible only by boat.
#opensource #digitaltwin #kefalonia
Build Log #1 is love. 48 hours, one Sentinel-2 pass and a Python script I'm not proud of but that works.
I wrote up the full pipeline, from downloading granules to the moment i realised NDVI 0.3 might mean just rocks.
The satellite sees what it sees. We'll figure out the context together. #geo
I wrote up the full pipeline, from downloading granules to the moment i realised NDVI 0.3 might mean just rocks.
The satellite sees what it sees. We'll figure out the context together. #geo
August 17, 2026 at 6:40 AM
Build Log #1 is love. 48 hours, one Sentinel-2 pass and a Python script I'm not proud of but that works.
I wrote up the full pipeline, from downloading granules to the moment i realised NDVI 0.3 might mean just rocks.
The satellite sees what it sees. We'll figure out the context together. #geo
I wrote up the full pipeline, from downloading granules to the moment i realised NDVI 0.3 might mean just rocks.
The satellite sees what it sees. We'll figure out the context together. #geo
Today GR Civil protection puts half the country (Attica, Viotia & Evia, Cyclades, Crete) in Code Red of wildfire danger for Sunday 16 Aug 2026.
Full mobilisation and rightly so.
But how does the daily risk map reach municipalities? How are decisions actually made?
1/2
Full mobilisation and rightly so.
But how does the daily risk map reach municipalities? How are decisions actually made?
1/2
August 15, 2026 at 2:10 PM
Today GR Civil protection puts half the country (Attica, Viotia & Evia, Cyclades, Crete) in Code Red of wildfire danger for Sunday 16 Aug 2026.
Full mobilisation and rightly so.
But how does the daily risk map reach municipalities? How are decisions actually made?
1/2
Full mobilisation and rightly so.
But how does the daily risk map reach municipalities? How are decisions actually made?
1/2