#30DayMapChallenge Day 26: Transport 🚇 Still in Algeria, so I kept it simple: vector tiles via @maptiler.bsky.social + #OpenStreetMap in #QGIS to show public transport in Algiers. The Algiers Metro is Africa’s 2nd metro after Cairo, opened in 2011.

#30DayMapChallenge Day 25: Hexagons Busy with a water seminar organised by the Dutch embassy in Algiers, I had little time to map. So I turned to the HDX dataset of 400 m H3 hexagons and plotted the population density of the Netherlands in 2023. #GIS #QGIS #Cartography #OpenData

#30DayMapChallenge Day 24: Places and their names I mapped toponyms linked to medieval cope contracts: agreements that allowed settlers to drain and farm peatlands. Names ending in ‑cop, ‑koop, ‑kop all trace back to this hostory. The naming tradition even spread to northern Germany and Poland.

#30DayMapChallenge, day 23: Process Flow directions in the French Alpes with a 5 m RGEALTI DTM (IGN France). Using #QGIS’s new native Fill Sinks (Wang & Liu), I calculated flow directions, converted them to a mesh via #Crayfish, styled with arrows, and visualised in #3D.   🎥 youtu.be/ttLxQBe0HIo

#30DayMapChallenge Day 22 – Data: #Natural Earth 🌍 ⏳ With limited time I used my own tutorial to make a population map in #QGIS. 🔗 Tutorial: courses.gisopencourseware.org/mod/book/vie... 🎥 YouTube: 👉 Symbolizing points: youtu.be/0PEZ8dUNCJk 👉 Collapsed legend: youtu.be/hxzNOf3ppbQ

#30DayMapChallenge Day 21: Icons 🗺️➡️🎶 My week in emojis. Made in #QGIS with @maptiler.bsky.social backdrop

#30DayMapChallenge Day 20: Water 🌊 No time for complexity today, so I made Invearth. By simply flipping the hillshade to Southeast in #QGIS with the #Mapzen Global Terrain layer, the Himalayas became the deepest trench and oceans turned into habitable land.

#30DayMapChallenge Day 19: #Projections 🍊🌍 Ever tried peeling an orange and laying it flat? It cracks apart, just like the Earth when we project it onto a map. World map out of orange peel, styled in a polar stereographic projection. Made in #QGIS with #NaturalEarth data.

#30DayMapChallenge Day 18: Out of this world 🌍➡️🚀 I mapped #Mars using the blended MOLA + HRSC elevation dataset from #USGS #Astrogeology. Styled in #QGIS with Martian colours + hillshade, then explored the new #3D Globe view, works beautifully!

#30DayMapChallenge Day 17: A New Tool Tried #JupyterGIS, a #Python-based mapping tool in #JupyterLab, for mapping transboundary aquifers using open data from @igrac.bsky.social + #HydroSHEDS. Real-time map+code collaboration, live annotations, and reproducible workflows.

#30DayMapChallenge Day 16: Cells For today’s theme, I explored the spatial distribution of prisons across Europe. Using the QuickOSM plugin, I extracted locations from #OpenStreetMap, then visualized them as a heatmap in #QGIS. The map is set against a @maptiler.bsky.social vector tile backdrop.

#30DayMapChallenge Day 15: Fire 🔥 Mapped the density of fire stations in the Netherlands using #QGIS. #OpenData from #OpenStreetMap via QuickOSM plugin. Styled with #heatmap renderer. Fire service zones from @cbsstatistiek.bsky.social via #PDOK Services plugin.

#30DayMapChallenge – Day 14: Data Challenge #OpenStreetMap Although this year’s challenge doesn’t include a #VintageMap theme, I decided to bring a bit of history into today’s task. Using #QGIS, I styled current OpenStreetMap data of #RhodeIsland in the aesthetic of 19th‑century maps.

#30DayMapChallenge – Day 13: 10 minute map Map of the #Mara River Basin made in #QGIS with #HydroSHEDS #opendata and @maptiler.bsky.social #vectortiles. 🎥 Try it for your own catchment: youtu.be/hUgEYKz87gw

#30DayMapChallenge Day 12: Map from 2125 A worst‑case scenario of 2.5 m #SeaLevelRise reshapes the delta of the Netherlands. Made in #QGIS with SRTM90 via @opentopography.org, raster image styled polygons, @maptiler satellite raster tiles, and rendered in #3D using Qgis2threejs.

#30DayMapChallenge Day 11: Minimal Map #Rotterdam shown only by land & water, revealing how the port shifted from city center to the North Sea with Maasvlakte & Tweede Maasvlakte. Once the world’s largest port, now 3rd, still a global hub. Made with #QGIS, @maptiler.bsky.social and CBS data.

#30DayMapChallenge Day 10: Air 🌪️ Animated mesh layers of #hurricane tracks resembling Vincent van Gogh’s Starry Night. #HurricaneMelissa #Jamaica. Made with #QGIS. Data from #Copernicus #ECMWF

#30DayMapChallenge – Day 9: Analog 🍂 European QGIS User Groups on a natural canvas of autumn leaves. #GIS #Cartography

#30DayMapChallenge Day 8: Urban On #WorldUrbanismDay, I highlight the most paved municipality in the Netherlands: Krimpen aan den IJssel (43.3%), with Kortland-Noord at nearly 53%. This Imperviousness Map was made by Friedenau Society for Climate Adaptation Services, derived from AHN LiDAR + BGT.

#30DayMapChallenge Day 7: Accessibility 🌍✈️ I mapped visa-free travel: 🛫outbound (where citizens can go) and 🛬inbound (who countries let in). It reveals global mobility inequality. 📊 Data: 2025 Passport Index 🛠️ Made with QGIS #VisaFreeTravel #Deglobalisation #QGIS #GIS #DataViz

#30DayMapChallenge Day 6: Dimensions Today’s map is a #3D view of Algiers using #QGIS. Elevation = evapotranspiration! I used a #FAO #WaPOR L1 AETI image from 2008 as the elevation model, draped with Google Satellite imagery. Vegetated/agricultural zones rise above urban areas. #GIS #RemoteSensing

#30DayMapChallenge Day 5: Earth🌍 #Groningen’s gas extraction and #Limburg’s mining caused seismic risks, which js now a political issue around damage & compensation. Made while teaching #QGIS & @merginmaps.bsky.social in Leek (Groningen) for #QWAST #Fervent & #Geo2Meet.

#30DayMapChallenge Day 4 – Data: My Data 🌍 Every year, a colleague asks me to map the geographic distribution of new MSc students in Water & Sustainable Development at #IHEDelft. A beautiful dataset that reflects our global classroom! #GIS #OpenData #WaterEducation

#30DayMapChallenge Day 3: polygons 🌍 Busy day, but I made an animated map of CO₂ emissions per capita using data from @ourworldindata.org. Tools: #QGIS #GIMP. Tutorial: courses.gisopencourseware.org/mod/book/vie... @gisopencourseware.bsky.social. #GIS #OpenData

#30DayMapChallenge day 2: Lines 🗺️ Mapped Rotterdam’s watery past through street names with pre- and suffixes like singel, boezem, sloot, vaart, haven, and gedempte. These names trace water infrastructure. Some still flowing, others filled in. Made with #qgis #openstreetmap and #maptiler

#30DayMapChallenge 2025 Day 1: points Inspired by my stay in Maastricht performing #CarminaBurana with #BrabantKoor & the Jussen Brothers. #toponyms ending in -tricht, -drecht, -trecht, derived from Latin #trajectum, meaning river crossing. Made with #QGIS #OpenStreetMap & @maptiler.bsky.social

Taught #QGIS for Hydrological Applications at @tudresden.bsky.social Tharandt campus. Nice group of #ErasmusMundus #FloodRiskManagement students earned official QGIS certificates after successful completion. Open source GIS empowering future water pros! 💧 #QGIS #QGISHydro #Hydrology #GIS #IHEDelft

🎥 I've published a video based on my #geomobNL talk in Eindhoven on 18 Sept on #digitalsovereignty & #opensource for geo, covering procurement, policy, and community-driven development. Watch here: youtu.be/0u6tPM-USHY 💬 Feel free to share your comments.

Want to start a #QGIS User Group or grow one? Join us this Friday for a #QGISOpenDay session with PSC Chair Marco Bernasocchi & @timlinux.bsky.social! Learn how to launch, run, and connect your group globally 🌍 📅 26 Sept 2025 🕚 11H00 UTC 📺 Livestream and more info: github.com/qgis/QGIS/wi...

Taught #QGIS for groundwater applications to #ErasmusMundus #GroundwatCH MSc students last week at Instituto Superior Técnico in Lisbon. With inspiring guest lectures from @timlinux.bsky.social & alumna Namrata Karki. Students received the official QGIS certificate. #IHEDelft

🎉 QGIS Plugin Upgrade Dag afgelopen vrijdag was een succes! Met 16 #QGIS plugin-ontwikkelaars doken we in #Qt6, conversiescripts en upgrade-strategieën. Resultaat: geüpgradede plugins, gedeelde kennis en een topdag in een prachtige locatie. Dank aan @geocat.net voor het hosten! #OpenSource #GIS

🔧 QGIS Plugin Upgrade Dag op 5 sept bij @geocat.net in Wageningen! Samen plugins upgraden voor QGIS 4.0 (Qt6), kennis delen & tools verkennen. 👨‍💻👩‍💻 Ontwikkelaars welkom! 📅 Aanmelden vóór 31 aug via: qgis.nl/event/plugin... #QGIS #QGISNL #GeoCat #OpenSource #Python #Qt6 #GIS

Just came back from #FOSS4GE 2025 in Mostar by public transport 🚉 From train delays to inspiring workshops, talks & riverside drinks, it was a ride! 📖 Read the full story: www.qwast-gis.com/l/foss4g-eur... #gischat #FOSS4G #OSGeo #GIS #QGIS #FOSS4GEurope

🚀 Today, I'm running a workshop on #PointCloud Processing in #QGIS at #FOSS4GEurope 2025 in #Mostar! We'll dive into the newest features in QGIS. 💻 Can’t join in person? Free access at @gisopencourseware.bsky.social: courses.gisopencourseware.org

Vorige week waren we weer met veel leden bij de #FOSS4GNL, door #OSGeoNL georganiseerd op de campus van Universiteit Wageningen. Er waren weer veel interessante workshops en inspirerende presentaties. ⛺️ Voor onze leden was er ook weer een supergezellige QGIS Camping! #QGISNL #FOSS4G #QGIS

Wij zijn op de #FOSS4GNL conferentie in Wageningen. Na de geweldige workshopdag en ice breaker party gisteren, zijn er vandaag veel interessante presentaties! #QGISNL #QGIS #OSGeo #OSGeoNL #FOSS4G

#QGIS #WaPlugin workshop at #FOSS4GNL in Wageningen. #FAO #WaPOR #waterproductivity #IHEDelft Follow along at @gisopencourseware.bsky.social courses.gisopencourseware.org/course/view....

Today at #FOSS4GNL, I'm giving 2 workshops. Follow along at @gisopencourseware.bsky.social: 👉 Enhancing Crop Water Productivity with WaPOR: A Hands-On Workshop Using #WaPlugin in #QGIS: courses.gisopencourseware.org/course/view.... 👉Mesh Data in QGIS: courses.gisopencourseware.org/course/view....

🎙Last Saturday, I had a great chat with Safae Aala on the To Open Doors I.Talk #podcast about my 25-year GIS journey. We covered #QGIS, #opensource, #education & #innovation.   📺 Check it out here: youtu.be/_qhJezrsK-o #gischat

Don't forget to get your ticket for #FOSS4GNL! 📅 2 - 3 July 📍Wageningen 🔗https://foss4g.nl/ Workshops & talks in English and Dutch #GIS #FOSS4G #FOSS4GNL #OSGeo #OSGeoNL @qgis.nl

🎥  New video demonstrating the #QGIS Resources Hub portal and plugin: youtu.be/79yFgVLvuZM Improvements made during #QGISUC25 last week. Thanks to @xpirix.bsky.social, @ismailsunni.bsky.social & Ronit Jadhav! Looking forward to see more contributions from the QGIS community to the hub! #gischat

Teaching the workshop Hydrological Analysis in #QGIS at #qgisuc25 in Nörrkoping, Sweden. Follow along for free at @gisopencourseware.bsky.social: courses.gisopencourseware.org/course/view....

This week, I’m at #qgisuc2025 in Norrköping, Sweden! Inspiring talks, hands-on workshops! 💡Today, I’m giving a workshop on hydrological analysis tools in #QGIS, follow along at @gisopencourseware.bsky.social: courses.gisopencourseware.org/course/view....

🔥 De QGIS.NL-dag & ALV 2025 gisteren in Utrecht was een topdag! 💻💚 Samen hebben we gewerkt aan de website (qgis.nl), stickers, ledenadministratie en meer! De dag werd afgesloten met een gezellige borrel en pizza's 🍕. Dank aan iedereen die heeft bijgedragen! 🫶🏼 #QGISNL #GIS #QGIS #OSGeoNL

🚀 The new #QGIS Certification Programme Website is live! 🔍Easily find training courses: 🗺 Use an interactive map to find certified training providers. 📅 Check out upcoming courses offering official QGIS certification. 🫶🏼 Thanks Lova, @timlinux.bsky.social & others! 🔗 certification.qgis.org

Gisteren stonden we met een QGIS stand op de HAS Geo Experience 2025 in 's-Hertogenbosch! Inspirerende gesprekken gevoerd met studenten, docenten en GIS-professionals over de mogelijkheden van open-source GIS. 💡 Sluit je aan bij onze community: qgis.nl #QGIS #QGISNL #OSGeo #OSGeoNL

📢 2 & 3 juli: FOSS4GNL 2025! Call for Presentations/Workshops open t/m 1 mei. We zien graag jouw toepassingen in een QGIS track én hebben campingplekken voor onze leden! 💡Meer info over de conferentie: foss4g.nl ⛺️Aanmelden voor de camping: qgis.nl #FOSS4GNL #QGIS #OSGeoNL

Looking for teaching&learning resources on #GeoAI? > doi.org/10.1201/9781... and github.com/GeoDS/GeoAIH...

👀 New biweekly #qgis documentation and website sprint updates by Selma and Lova https://youtu.be/9bekJq9tRJU?si=kO4nle-eZLlJIqRh #gischat #osgeo #foss4g

🎉 Big Changes Ahead: We're moving to Qt6 and Launching #qgis 4.0! https://blog.qgis.org/2025/04/17/qgis-is-moving-to-qt6-and-launching-qgis-4-0/ #gischat #osgeo #foss4g