#qgis — Public Fediverse posts

I try to write a png of a map with #qgis and pythoon. This works well for data from a local gpkg-file, but fails on e.g. OSM; there I just get a solid lightblue box for the OSM data. Happens within qgis and as standalone code.

Inside qgis directly use the code from 10.1 https://docs.qgis.org/3.44/en/docs/pyqgis_developer_cookbook/composer.html#simple-rendering . It also shows the correct info on OSM with .metadata().rights().

Any hints or what should I test? In the map within the qgis GUI everything looks ok.

Code at https://volatile.ayous.org/~aba/.qgis-min.py

I try to write a png of a map with #qgis and pythoon. This works well for data from a local gpkg-file, but fails on e.g. OSM; there I just get a solid lightblue box for the OSM data. Happens within qgis and as standalone code.

Inside qgis directly use the code from 10.1 https://docs.qgis.org/3.44/en/docs/pyqgis_developer_cookbook/composer.html#simple-rendering . It also shows the correct info on OSM with .metadata().rights().

Any hints or what should I test? In the map within the qgis GUI everything looks ok.

Code at https://volatile.ayous.org/~aba/.qgis-min.py

I try to write a png of a map with #qgis and pythoon. This works well for data from a local gpkg-file, but fails on e.g. OSM; there I just get a solid lightblue box for the OSM data. Happens within qgis and as standalone code.

Inside qgis directly use the code from 10.1 https://docs.qgis.org/3.44/en/docs/pyqgis_developer_cookbook/composer.html#simple-rendering . It also shows the correct info on OSM with .metadata().rights().

Any hints or what should I test? In the map within the qgis GUI everything looks ok.

Code at https://volatile.ayous.org/~aba/.qgis-min.py

I try to write a png of a map with #qgis and pythoon. This works well for data from a local gpkg-file, but fails on e.g. OSM; there I just get a solid lightblue box for the OSM data. Happens within qgis and as standalone code.

Inside qgis directly use the code from 10.1 https://docs.qgis.org/3.44/en/docs/pyqgis_developer_cookbook/composer.html#simple-rendering . It also shows the correct info on OSM with .metadata().rights().

Any hints or what should I test? In the map within the qgis GUI everything looks ok.

Code at https://volatile.ayous.org/~aba/.qgis-min.py

I try to write a png of a map with #qgis and pythoon. This works well for data from a local gpkg-file, but fails on e.g. OSM; there I just get a solid lightblue box for the OSM data. Happens within qgis and as standalone code.

Inside qgis directly use the code from 10.1 https://docs.qgis.org/3.44/en/docs/pyqgis_developer_cookbook/composer.html#simple-rendering . It also shows the correct info on OSM with .metadata().rights().

Any hints or what should I test? In the map within the qgis GUI everything looks ok.

Finished teaching #QGIS for #Groundwater Applications to the #ErasmusMundus GroundWatCh MSc students at IST in Lisbon! Despite very hot days in classrooms without AC, the group worked hard and produced great groundwater and surface water maps.

Today, the students received their official QGIS certificates.

Great closing session with @timlinux, presenting on QGIS behind the scenes. Looking forward to seeing the students again at #IHEDelft in 6 months!

Finished teaching #QGIS for #Groundwater Applications to the #ErasmusMundus GroundWatCh MSc students at IST in Lisbon! Despite very hot days in classrooms without AC, the group worked hard and produced great groundwater and surface water maps.

Today, the students received their official QGIS certificates.

Great closing session with @timlinux, presenting on QGIS behind the scenes. Looking forward to seeing the students again at #IHEDelft in 6 months!

Finished teaching #QGIS for #Groundwater Applications to the #ErasmusMundus GroundWatCh MSc students at IST in Lisbon! Despite very hot days in classrooms without AC, the group worked hard and produced great groundwater and surface water maps.

Today, the students received their official QGIS certificates.

Great closing session with @timlinux, presenting on QGIS behind the scenes. Looking forward to seeing the students again at #IHEDelft in 6 months!

Finished teaching #QGIS for #Groundwater Applications to the #ErasmusMundus GroundWatCh MSc students at IST in Lisbon! Despite very hot days in classrooms without AC, the group worked hard and produced great groundwater and surface water maps.

Today, the students received their official QGIS certificates.

Great closing session with @timlinux, presenting on QGIS behind the scenes. Looking forward to seeing the students again at #IHEDelft in 6 months!

Finished teaching #QGIS for #Groundwater Applications to the #ErasmusMundus GroundWatCh MSc students at IST in Lisbon! Despite very hot days in classrooms without AC, the group worked hard and produced great groundwater and surface water maps.

Today, the students received their official QGIS certificates.

Great closing session with @timlinux, presenting on QGIS behind the scenes. Looking forward to seeing the students again at #IHEDelft in 6 months!

🚀 The new edition of the book #Geomorphometry is almost available. It’s not open access, but I’m glad to see a strong shift toward #OpenSource tools like #QGIS, #PCRaster, #GRASS, #Whitebox and Python/R packages. Happy I could contribute to this through my chapter on QGIS and PCRaster!

More info and pre-order: https://shop.elsevier.com/books/geomorphometry/reuter/978-0-443-33376-7

🚀 The new edition of the book #Geomorphometry is almost available. It’s not open access, but I’m glad to see a strong shift toward #OpenSource tools like #QGIS, #PCRaster, #GRASS, #Whitebox and Python/R packages. Happy I could contribute to this through my chapter on QGIS and PCRaster!

More info and pre-order: https://shop.elsevier.com/books/geomorphometry/reuter/978-0-443-33376-7

🚀 The new edition of the book #Geomorphometry is almost available. It’s not open access, but I’m glad to see a strong shift toward #OpenSource tools like #QGIS, #PCRaster, #GRASS, #Whitebox and Python/R packages. Happy I could contribute to this through my chapter on QGIS and PCRaster!

More info and pre-order: https://shop.elsevier.com/books/geomorphometry/reuter/978-0-443-33376-7

🚀 The new edition of the book #Geomorphometry is almost available. It’s not open access, but I’m glad to see a strong shift toward #OpenSource tools like #QGIS, #PCRaster, #GRASS, #Whitebox and Python/R packages. Happy I could contribute to this through my chapter on QGIS and PCRaster!

More info and pre-order: https://shop.elsevier.com/books/geomorphometry/reuter/978-0-443-33376-7

🚀 The new edition of the book #Geomorphometry is almost available. It’s not open access, but I’m glad to see a strong shift toward #OpenSource tools like #QGIS, #PCRaster, #GRASS, #Whitebox and Python/R packages. Happy I could contribute to this through my chapter on QGIS and PCRaster!

More info and pre-order: https://shop.elsevier.com/books/geomorphometry/reuter/978-0-443-33376-7

Observations like this, and probably others we haven't noticed, may be the answer to why #Perseverance has been going in circles up and down, left and right in this wide area called Lac De Charmes.

Map made with #QGIS using data from #NASA's #MMGIS and imagery from #HiRISE and #USGS

#Mars2020 #Solarocks #Space

New sol, new location, new site number 91. Relative to site coordinates x, y, z are reset to zero, so this is mostly guesswork.

That interface between smooth and rocky terrain ahead may be it. The destination.

Map made with #QGIS using #NASA's #MMGIS data and imagery and DTMs from #HiRISE and #USGS.

#Mars2020 #Solarocks #Space

That would have been the first crater to be closely examined by #Perseverance, but apparently it wasn't meant to be. Before even the digital ink in which my post was writen was dry, the rover moved once again, and is now past that little crater.
̄\_(ツ)_/ ̄

New location RMC : 90.6800, Sol:1946

#GIS #Mart2020 #NASA #HiRISE #USGS #QGIS #Space #Solarocks

🗺️ Von Vermessungsdaten zu qualifizierten Geodaten

📢 Vom 14. - 15. September findet die Survey2GIS-Praxiseinführung im Rahmen unserer Workshopreihe statt!

📅 14.-15.09.2026
⏰ jeweils 10:00-15:00 Uhr, inkl. Pause 12:00-13:00 Uhr
📝 Anmeldeschluss: 01.09.2026

Weitere Infos: https://www.nfdi4objects.net/events/n4o_activity_20260914-CM26_Survey2GIS/

#GIS #QGIS #Geodaten #Vermessungsdaten #N4OCM2026 #NFDI4Objects #NFDI #NFDIrocks

NEW UN Maps Learning Hub Course: QGIS Training

Jumpstart your GIS mapping skills using the free and open-source software #QGIS 💻

📚 Understand the basics of #GIS, QGIS and geospatial data
🗺️ Build your first map
📈 Perform data and map analysis
🌐 Explore real world examples

Start learning with #UNMaps today 👇
📍 https://maps.un.org/learning/

📸 Photo credit: Engelbert Modo

#UNMappers #MappingForPeace #Humanitarianmapping #UNMapsLearningHub #OpenStreetMap #OnlineLearning #volunteering #foss4g #foss

Изолинии как документ и кригинг, которому можно верить

Мы создаем софт для горно-геологических служб калийных рудников, и это третья статья цикла про геостатистику в QGIS: в первой был кригинг на чистом NumPy, во второй - выбор между пятью его видами. Сегодня две темы, которые остались за кадром, а в повседневной работе геолога решают едва ли не больше самой интерполяции. Первая - изолинии: не картинка поверх растра, а документ, который идёт в подсчёт запасов и на печатные планы, со строгими требованиями к геометрии. Вторая - всё, что живёт вокруг кригинга и превращает интерполяцию в решения: карта стандартной ошибки, кросс-валидация, внешний дрейф, вероятность превышения кондиции, гидравлика потока по Дарси и гауссова симуляция неопределённости.

https://habr.com/ru/articles/1057232/

#qgis #addon #isoline #gis #geostatistics

Reposted from #UNMaps Community Ambassador, Lucy Kago:

Launch and Week 1 of the #UNMappers Kenya Youth Climate Mapping Externship is a wrap! 👏🗺️

We are currently in Phase 1, the Learning Phase, where participants are building their geospatial skills and developing a deep understanding of the climate issues we are here to map.

We opened the week with onboarding, welcoming our 25 participants and setting the tone for the seven weeks ahead.

#UNMappersKenya
#ClimateAction
#QGIS
#ClimateEngine

Какой кригинг выбрать: простой, ординарный, с трендом, блочный, индикаторный

Мы создаем софт для горно-геологических служб калийных рудников, и после первой статьи про [кригинг на чистом NumPy]( https://habr.com/ru/articles/1055612/ ) самый частый вопрос звучал одинаково: «Хорошо, а какой именно кригинг брать?» Вопрос правильный: под словом «кригинг» живёт целое семейство методов, и выбор между ними влияет на результат сильнее, чем тонкая настройка вариограммы. В плагине Isoliner их пять - простой, ординарный, с полиномиальным трендом, блочный и индикаторный, - и каждый существует не для галочки, а под конкретный класс геологических задач. Под катом - разбор всех пяти на живых примерах калийного месторождения: когда какой, какие параметры за что отвечают, как это выглядит в коде и на каких ошибках спотыкаются чаще всего. <cut/> ## Общая механика: что меняется, а что нет Напомню каркас из первой статьи: оценка в точке - взвешенная сумма соседних скважин, веса - решение системы уравнений с ковариациями из вариограммы: ```python s = np.linalg.solve(A, r) # A - ковариации соседей между собой, w = s[:na] # r - ковариации соседей с точкой оценки est = float( np.dot (w, vra)) ``` Все пять видов кригинга решают эту систему. Различаются они тем, что считается неизвестным про среднее поле и что именно оценивается - точка, блок или вероятность. Это и есть ключ к выбору. ## Простой кригинг (SK): среднее известно Простой кригинг предполагает, что среднее значение поля вам известно заранее и постоянно по площади. Тогда система решается без дополнительных условий, а недобор веса соседей компенсируется этим средним:

https://habr.com/ru/articles/1056300/

#qgis #addon #isoline #gis #geostatistics

Геостатистика в QGIS без SAGA: кригинг на чистом NumPy

Мы создаем софт для горно-геологических служб калийных рудников. Наши геологи и маркшейдеры каждый день превращают тысячи скважинных проб в карты: отметки кровли пласта, содержания KCl, мощности, газоопасность. Классический инструмент для этого - кригинг, и в QGIS он формально есть: SAGA, GRASS, Smart-Map, связки со SciPy. На практике же каждый вариант чем-то не устраивал, и год назад я начал писать свой плагин. Сейчас Isoliner - это 24 инструмента в официальном репозитории plugins.qgis.org : кригинг четырёх видов, вариограммный анализ, кросс-валидация с отчётами, изолинии с контурными полигонами, геологические разрезы и собственный 3D-просмотр. Вычислительное ядро - чистый NumPy, ни одной внешней зависимости. Под катом - зачем понадобился ещё один кригинг, как выглядит система кригинга в двадцати строках NumPy, что такое вариограмма на пальцах и почему абсолютные единицы силла — главные грабли всех, кто впервые открывает такие инструменты.

https://habr.com/ru/articles/1055612/

#qgis #addon #isoline #gis #geostatistics

Y a t-il des libristes géomaticiens du coté de chez @fnl #Alposs qui sont à Paris demain pour le #techsprint EuroCommons de la Caisse des dépôts ?

J'y serais pour représenter l' #OSGEO-FR et #QGIS.org

https://www.caissedesdepots.fr/eurocommons

(2/2) Der gemeinsame #Flächenschwerpunkt von #Hamburg und den Inseln #Neuwerk, Scharhörn und Nigehörn liegt südlich vom Hauptbahnhof zwischen den Straßen Klostertor und Hühnerposten. #MPTyp 01 #QGIS #Pylone

(1/2) Die ebenfalls zu #Hamburg gehörenden Inseln #Neuwerk, #Scharhörn und #Nigehörn liegen ca. 112 km vom Hamburger Rathaus entfernt. Berechnet man mit diesen Exklaven den #Flächenschwerpunkt, rückt er ca. 1.127 m nach Westen. #MPTyp 01 #QGIS #Pylone

Schluss mit langweiligen WMS-Ausgaben! 🗺️

Annika Fröde zeigt, wie das Kartenhinweis-Feature (Map Tip) des QGIS Servers eure FeatureInfo-Antworten aufwertet:

📝 HTML-Template direkt im QGIS-Projekt definieren
⚙️ Dynamische Feldwerte per QGIS-Expression einbinden
🚀 Ausgabe mit WITH_MAPTIP=HTML_FI_ONLY_MAPTIP steuern
👀 Live-Vorschau direkt im QGIS-Desktop testen

💪 Professionelle FeatureInfo – ganz ohne Server-Templatedateien!

👉 https://www.wheregroup.com/ueber-uns/blog/qgis-server-ansprechende-featureinfo-ausgaben-dank-html-templates

#QGIS #QGISServer #WebGIS #WMS

Fresh off the press #qgis #foss4gna

🔍 "Recherche archéologique et SIG 3D dans QGIS - La Grotte #Cosquer" 🌊🐴 dans le cadre des Rencontres QGIS 2026
📅 25 mars 2026, 11h10
📍Brest
🎤 Caroline Font & Sylvain Rassat
A ne pas manquer lors des #RUQGIS2026 ! 🗺️✨
#QGIS #Archéologie #SIG #GrotteCosquer #CNRS OSGeo-fr Institut Universitaire Européen de la Mer (IUEM)
https://lnkd.in/e89dMG9T

RE: https://mapstodon.space/@JourneesQgis/116206298437753769

🔍 "Recherche archéologique et SIG 3D dans QGIS - La Grotte #Cosquer" 🌊🐴 dans le cadre des Rencontres QGIS 2026
📅 25 mars 2026, 11h10
📍Brest
🎤 Caroline Font & Sylvain Rassat
A ne pas manquer lors des #RUQGIS2026 ! 🗺️✨
#QGIS #Archéologie #SIG #GrotteCosquer #CNRS OSGeo-fr Institut Universitaire Européen de la Mer (IUEM)
https://lnkd.in/e89dMG9T

How did Calgary respond to the wet summer of 2025?
Here’s the median summer NDVI map derived from Sentinel-2 imagery.
You can clearly see the Bow River corridor, Nose Hill Park, and the contrast between established tree-rich communities and newer developments.

Full analysis here:
https://www.datastory.org.ua/how-much-greener-is-calgary-in-2025/

#Geospatial #NDVI #UrbanClimate #Calgary #RStats #GreennessOfCalgary #yyc #Apberta #QGIS #foss4g #EnvironmentalMonitoring #UrbanHealth

🚀 C++ | Qt | QGIS developer ? Oslandia launches paid code review contracts for the #OpenSource community, dedicated to #QGIS 💶

🎯 Goals
➡️ Lower the volume of open QGIS PRs
➡️ Strengthen code review efforts
➡️ Grow the pool of reviewers

👥 Who can apply?
➡️ Active QGIS community members
➡️ Or experienced C++ / Qt developers without QGIS experience

⏰ Open until Feb. 14

🤝 Interested ? Details and application : https://oslandia.com/en/call-for-interest-qgis-qt-reviews-contracts/

#Qt #Cplusplus #GIS #Community #CodeReview #Job #JobOffer

Convert GeoTIFF to PCRaster Format in QGIS

https://videos.qwast-gis.com/w/8QeKNy4RJJ5rxKUspjvZfy

#Perseverance either drove into a dead end and is now surrounded by heaps of sand, or found something interesting there, which we don't see yet…

Over-processed to show sand patterns, undistorted, leveled, cropped NAVCAM_RIGHT
looking ENE (71°) from RMC 82.2866
Sol 1704, LMST: 12:36:19

Original: https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/01704/ids/edr/browse/ncam/NRF_1704_0818212608_691ECM_N0822866NCAM02704_01_195J01.png

Credit: #NASA/JPL-Caltech/65dBnoise

#Mars2020 #Solarocks #Space #QGIS #MMGIS #USGS #HiRISE

#GreennessOfCalgary
I’ve almost finished it!
I’ve uploaded all eight parts of “The Greenness of Calgary: A Community-Level Atlas (2025). Contrast Color Edition” to #Gumroad

Each part is a separate PDF using the “classic” high-contrast NDVI palette, optimized for visual interpretation of vegetation patterns. (The soft green palette will come later.)

I’ve created a dedicated landing page with descriptions of all releases and download links.
📎 Landing page is here: https://datastory.gumroad.com/l/qemrgul

💲 The materials are available under a “pay what you want” model — free or with optional support.

This is my first attempt at publishing geospatial analytical materials in this format. I apologise for some template-like descriptions. I hope this atlas series will be useful for researchers, enthusiasts, and anyone interested in Calgary’s urban ecology.

#Calgary #YYC #UrbanEcology #NDVI #RemoteSensing #GIS #OpenData #Geospatial #DataVisualization #Cartography #QGIS #FOSS #Canada #Alberta #RStats #Sentinel2

#OpenSource im #Gesundheitswesen

Drei #Säule​n des #Gesundheitswesen​s: #Ambulant​e #Versorgung, #Stationär​e #Versorgung, #Öffentlich​er #Gesundheitsdienst

#OpenSource im #Gesundheitswesen:

- #Praxisverwaltungssoftware
-> #GNUmed / #Thera-Pi / #OpenEMR
- #Elektronisch​e #Patientenakte
-> #Module / #Komponent​en
- #Verwaltung & #Forschung
-> #Ehrapy, #QGIS, #RStudio, #Agora (#Kollaborationsplattform), #SORMAS, #DHIS2

#Vortrag Lara #Reußwig
#OSBA #Connect 2025
https://www.youtube.com/live/oBUoYPT09Gc?si=-rie79Pnitnf4cfA&t=2266

💧 Exploring how contaminated mine waters behave in a carbonate aquifer — through the lens of metasomatic zoning and thermodynamic #geochemical modeling.

Using #PHREEQC simulations, data analysis in #RStats, and geospatial visualization in #QGIS, I’m studying how mine drainage transforms groundwater systems and mineral equilibria over time.

📘 The draft version (v0.75) of my monograph on this topic has already been downloaded 550+ times on #Zenodo — showing how relevant this issue has become for both science and environmental policy.

It’s independent research that links theory, modeling, and practical hydrogeochemical assessment — focused on the long-term impact of mine waters in the Kryvyi Rih region.

🔗 Read or download:
https://zenodo.org/records/16741148

#Geochemistry #Groundwater #MineWater #EnvironmentalGeochemistry #Hydrogeology #WaterPollution #Metasomatism #OpenScience #IndependentResearch #EnvironmentalDataScience #Aquifer #HeavyMetals #Sustainability #SvystunovaGully

And that's a wrap.... #foss4gna #foss4g #osgeo #qgis

It's cool being in the same room with a QGIS developer. Martin Dobias....whose name I have mispronounced in my brain for several years #foss4gna #qgis #osgeo

@fionag11 #FediHire #qgis #job #joboffer :)

Security test of QGIS Server and QGIS Web Client: Switzerland’s National #Cyber Security Centre (#NCSC) and the National Test Institute for Cybersecurity (#NTC) have completed a pilot test assessing the #security of #QGISServer and the #QGIS Web Client. The test identified six vulnerabilities —...
https://spatialists.ch/posts/2025/10/14-security-test-of-qgis-server-and-qgis-web-client/ #GIS #GISchat #geospatial #SwissGIS

Automate #QGIS like a Pro! Master the Model Designer tool in this exclusive workshop led by Randal Hale. Transform your workflow and save countless hours. https://bit.ly/foss4gna2025 #FOSS4GNA

Chez #3Liz, toute l'équipe s'investit pour vous offrir un service de qualité ! 👌

En 2025, nos offres d'hébergement "Standard" et "Advanced" sont désormais proposées avec des SSD NVMe de dernière génération, vous offrant ainsi des performances optimales pour tous vos projets #Lizmap. 🌍

Plus d'informations sur https://www.lizmap.com/offres.html

#qgis #webmapping

Vorige week waren we weer met veel :qgis: leden bij de #FOSS4GNL, georganiseerd door @osgeonl!
In het nieuwe Omnia-gebouw op Wageningen Campus kwamen we samen met de NL open geo-community. Het programma stond vol met interessante workshops en inspirerende presentaties.
⛺️ Voor onze leden was er ook weer een supergezellige QGIS Camping!
#QGISNL #OSGeoNL #QGISCamping #QGIS #OSGeo #FOSS4G

After a very long stay at Pine Pond #Perseverance has now moved further down hill, apparently reaching the bottom of the Witch Hazel Hill area, where it has spent the last 120 sols examining rocks.

The path shown is a guess. Elevations are from the Octavia E. Butler landing location.

The map was made in #QGIS, using #NASA's #MMGIS and #HiRISE and #USGS imagery and DTMs.

#Solarocks #Space

Just learned about #qgis #server light by @opengisch #qgisserver #pyqgis
https://github.com/opengisch/qgis-server-light

🤿 Enfilez vos combinaisons de containers et plongez dans les profondeurs de QGIS server, pour le déployer avec docker, un article qui vous ouvrira les flux OGC vers l'architecture de la cité legendaire.

✒️ @pblottiere

👓 @pjeremie, @lbartoletti, Benoit De Mezzo, @CabiecesJ, @geojulien

https://geotribu.fr/articles/2025/2025-04-15_official-qgis-server-docker-image/

#QGIS #QGISserver #docker

#Perseverance has now arrived at the area called Broom's Point.

Tosol is Sol 1435 of the #Mars2020 mission, Lₛ is 52.1, and the local time in Jezero Crater is now 18:21.

The map was made with #QGIS and data from #NASA's #MMGIS, #HiRISE and #USGS

Processed, leveled, cropped NAVCAM_RIGHT mosaic
looking NNW (332°) from RMC 69.2124
Sol 1435, LMST: 13:51:34

One original:
https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/01435/ids/edr/browse/ncam/NRF_1435_0794336896_722ECM_N0692124NCAM03435_01_195J01.png

Credit: #NASA/JPL-Caltech/65dBnoise

Solarocks #Space

In knapp zwei Monaten halte ich auf der @fossgis_konf eine Demosession zur Georeferenzierung #historischer #Karten mit #QGIS. Dabei sein lohnt sich, in Präsenz onsite oder virtuell online 👇
https://www.fossgis-konferenz.de/2025/anmeldung/
Den Inhalt der Demosession findet ihr hier: 👇
https://pretalx.com/fossgis2025/talk/E8EPG3/