https://github.com/scubbx/qgis-qkies QGIS Qkies

This video introduces a custom QGIS Processing Script designed to automatically delineate headwater catchments up to a specified maximum size. The tool identifies small upstream basins using a Strahler stream order threshold derived from a raster Strahler order map. By combining hydrological logic with PCRaster functions, it provides a fast and reproducible workflow for pinpointing the smallest contributing catchments in a river network. 💡 Why This Tool Is Useful Headwater catchments are critical zones for: * Water management and conservation * Erosion and sediment control * Flood mitigation planning * Nature‑based solutions and upstream interventions * Hydrological modelling workflows Small upstream basins often have outsized influence on downstream water quality and flow dynamics. This script makes it easy to identify and map these sensitive areas, supporting evidence‑based decision‑making in hydrology, environmental management, and spatial planning. 0:00 Introduction to the QGIS Resources Hub 0:29 QGIS Processing Scripts 0:41 The Headwater Catchments Processing Script explained 2:09 Install the QGIS Hub plugin 2:27 Add a Processing Script to QGIS 2:56 Use the Headwater Catchments tool 3:47 Check the results

We are busy preparing the next FOSS4G-BE of October 15th, but need your help to make another fantastic program! Call for presentations, maps and workshops is open now! https://www.foss4g.be/en/present #foss4g #osgeo #foss4gbe #osgeobe

Linux, Windows and Mac packages of #QGIS point releases 3.44.12 "Solothurn" (LTR) and 4.2.0 "Belém do Pará" (next LTR) ready on https://
qgis.org. Make maps not war!

Giving my workshop on the new #gdal command line interface at #FOSS4GNL in Groningen. Free materials in English can be found at @gisocw: https://courses.gisopencourseware.org/mod/book/view.php?id=1424

Onderweg naar #FOSS4GNL in Groningen, georganiseerd door @osgeonl & @qgisnl i.s.m. @Jantina_Tammes_School @universityofgroningen.

Ik geef vandaag 3 workshops die je ook gratis kan volgen op @gisocw:
🔸️ Hands‑on met de nieuwe #GDAL Command Line Interface: https://courses.gisopencourseware.org/course/view.php?id=88
🔸️#PointCloud Processing met #QGIS: https://courses.gisopencourseware.org/course/view.php?id=89
🔸️#GeoAI in actie: https://courses.gisopencourseware.org/course/view.php?id=87
In samenwerking met Peter Schols (Geo-ICT Training Center)

Workshops are in full swing at #FOSS4GEurope! Tomorrow I’m giving my Hydrological Analysis in #QGIS workshop, covering native tools + #PCRaster, #GRASS and #WhiteboxTools 💧

👉 Follow along online at @gisocw: https://courses.gisopencourseware.org/course/view.php?id=86

For advanced methods, check out the QGIS Masterclass at the #AustralianWaterSchool: https://awschool.com.au/training/qgis-masterclass/
‼️Use AWS-FOSS-20 for 20% off until tomorrow!

#FOSS4G #QGIS #GIS

Mapping your campaign fieldwork doesn’t have to be chaotic. In this video, we show how Mergin Maps and QGIS can streamline canvassing activities such as door‑to‑door visits, leaflet rounds, and neighbourhood outreach. You’ll see how to: * Build a simple, clear data model for canvassing * Use Map Themes to switch between tasks in the field * Plan campaign activities * Track progress live with volunteers Whether you’re coordinating a local initiative, organising community engagement, or exploring data‑driven outreach, this workflow helps you stay organised, transparent, and efficient. Thanks to Joost Mak for the professional pictures included in the video. 0:00 Introduction 0:31 Setup a new basic QGIS project for Mergin Maps 1:00 Add neighbourhood polygons through the PDOK Services plugin 3:46 Add buildings through the BGT Downloader plugin 5:30 Create the poster layer 5:46 Store campaign activities in a non-spatial layer 6:37 Setup a relation 7:12 Configure the widgets for the neighbourhood layer 8:25 Configure the widgets for the campaign form 10:31 Generate UUIDs 10:56 Check the form in the attribute table 11:30 Finishing touches of the campaign form 12:02 Configure the widgets for the buildings layer 13:37 Configure rule-based styling of the buildings layer 15:51 Configure the widgets for the poster layer 17:00 Configure Map Themes 17:37 Configure Map sketching 18:30 Check the project in the Mergin Maps app 21:35 Monitor campaigns in the Mergin Maps dashboard

Public sector #GIS users, your input matters!
The QGIS Trainer Network is running an international survey on how public institutions use and teach open‑source GIS. Results will be presented at the QGIS User Conference 2026 in Laax.
👉 Take the survey here: https://nx84716.your-storageshare.de/apps/forms/s/yZGamxYmwoSFcN9GmwymcBcs

#QGIS #OSGeo #OpenSource #FOSS4G

In this tutorial, we show you how to use Map Themes to create a seamless transition between different background maps and layer styles directly on your mobile device. You will learn how to define custom symbology for your survey layers and configure themes in QGIS using the eye icon in the Layers panel. By syncing these themes to the Mergin Maps mobile app, you can switch backgrounds and styles instantly while in the field. This ensures your data remains visible and clear, whether you are using standard topographic maps or high-resolution satellite imagery. Mergin Maps is an intuitive, open-source platform designed to take your QGIS projects into the field. It allows for seamless data synchronization and works entirely offline, making it the perfect tool for capturing geodata in any environment.

GRASS Community Meeting 2026 is coming to San Michele all’Adige, Trentino, Italy. July 11–19, 2026.

The week will focus on the Python API and CMake build system transitions, documentation, and interoperability with QGIS, R and more.

Add your name and find logistics, venue details, and the agenda on the wiki:
https://grasswiki.osgeo.org/wiki/GRASS_Community_Meeting_San_Michele_2026

Support makes participation possible for more contributors. Donate via NumFOCUS:
https://numfocus.org/donate-to-grass
https://grasswiki.osgeo.org/wiki/GRASS_Community_Meeting_San_Michele_2026

📢Op 8–9 juli is er weer #FOSS4GNL, dit jaar in Groningen. De Call for Proposals staat open! Wij zijn er uiteraard ook weer bij.

Werk je met #opensource #GIS? Dien je voorstel in voor een presentatie, workshop of rondetafelgesprek. Makers én gebruikers zijn welkom: van slimme scripts tot praktijkcases rond klimaat, water, ecologie, milieu, mobiliteit, #OpenData en #DigitaleSoevereiniteit.

👉 Indienen kan t/m 15 mei: https://pretalx.com/foss4gnl/cfp

@osgeonl #QGIS #FOSS4GNL #FOSS4G #QGISNL

Vandaag staan @terglobo en ik op de HAS #GeoExperience in 's-Hertogenbosch met een #QGIS‑stand. We geven ook een workshop over #pointcloud processing & #3D #visualisatie in QGIS.

Niet erbij? De workshop is gratis online te volgen op @gisocw: https://courses.gisopencourseware.org/course/view.php?id=82

Er staan nóg meer NL‑cursussen op GIS OpenCourseWare. Zie: https://courses.gisopencourseware.org/course/index.php?categoryid=8

@qgisnl

I’ve published a new video showing how the AI Edit plugin by #TerraLab can be used to visualise spatial planning scenarios in #QGIS.

From replacing an airport to simulating floods, adding green roofs, reopening canals, or generating a Dutch polder, it’s all there, with impressive visual results.

▶️ QwastTube: https://videos.qwast-gis.com/w/iUHsR4ceNzcP3d1B287sJ9

#QGIS #GeoAI #GenAI #SpatialPlanning #GIS

🗓Save the date: 8–9 juli!
Na 9 jaar keert #FOSS4GNL terug naar Groningen, waar het in 2017 begon.

Twee dagen vol #opensource geo: hands‑on workshops + een dag presentaties voor developers, toepassers, beheerders en beleidsmakers.

Samen met de @Jantina_Tammes_School bouwen @osgeonl en @qgisnl aan het programma & side‑events. Ideeën en helpende handen zijn welkom!

QGIS-US is hosting a virtual meeting next week!

Tuesday, April 21 at noon EDT.

Dr. Qiusheng Wu (University of Tennessee) will be speaking about his GeoAI plugin for QGIS that provides access to several tools for image segmentation, object detection, and feature extraction. #QGIS

https://www.qgis-us.org/2026/04/17/qgis-virtual-meeting-april-21st-2026-at-1200-est/

I just passed 35K subscribers on my YouTube channel and I'm grateful for everyone following my open‑source geo work.

But for those who prefer to avoid big tech: my videos are also published on #QwastTube, my own #PeerTube instance.

▶️ QwastTube: https://videos.qwast-gis.com/
▶️ YouTube (if you still use it): https://www.youtube.com/@HansvanderKwast

#FOSS4G #OpenSource #PeerTube #DigitalSovereignty #QGIS #GIS #WebODM #PCRaster #RemoteSensing

#WebODM has officially split from #OpenDroneMap.
Official announcement from WebODM https://webodm.org/blog/announcement/

I made a short video showing the full workflow:
💻 Install WebODM with the new native installers
📸 import drone images
⚙️ process (orthomosaic, DSM, point cloud, 3D model)
🖼️ view in 2D/3D
⬇️ download results
🗺️ open in QGIS

If you want a user‑friendly, #opensource alternative to proprietary photogrammetry tools, WebODM is highly recommended.

🎥 Video: https://videos.qwast-gis.com/w/2KjiiJtEXEqz9qCSQnG5Ug

New open course at @gisocw! Learn collecting ground truth in the field with @merginmaps, #AI-assisted #segmentation of ground truth polygons with the AI Segmentation plugin by #TerraLab and the full workflow from downloading #Sentinel-2 data, Random Forest classification & accuracy assessment using the Semi-Automatic Classification plugin in #QGIS.

🔗 https://courses.gisopencourseware.org/

#GIS #RemoteSensing #OSGeo #FOSS4G #MachineLearning