Mastodawn

Just published a tutorial about using GRASS for a viewshed workflow that employs an observer-relevant surface to selectively represent obstructions that effectively block line of sight at pedestrian height. This derived layer is then used to perform a cumulative viewshed analysis. Check it out here: https://ecodiv.earth/post/intervisibility/ #grassgis #osgeo #ahn #viewshed @grassgis

aandre Mar 17

On cherche un stagiaire équivalent Master 2 pour de la géomatique et traitement d'image.
Le coeur du travail est de la programmation Python avec GRASS GIS.
Vol financé.
#stage #géomatique #traitementDImage #Python #GRASSGIS #jeRecrute

Paulo Jan 30

Just updated my 'Species Distribution Modeling in GRASS' reader 📘. Right in time for our upcoming module for my 'Earth, data-analysis and visualization students at #HASgreenacademy 😅

Mostly small changes about the organization of results. The least exciting part of modeling, but it can absolutely mess up your workflow if not done right. Hopefully this lands before students learn that the hard way. 🤔

https://ecodiv.earth/TutorialsNotes/sdmingrassgis/

#SDM #Teaching #ReproducibleScience #GIS #GRASSGIS #FOSS #osgeo

💧🌏 Greg Cocks Jan 27

Learn GRASS GIS [etc]
--
https://grass-tutorials.osgeo.org/ <-- shared GRASS tutorials, etc
--
https://grass.osgeo.org/download/ <-- @GRASS GIS download page
--
H/T Doug Newcombe
“A new tutorial on creating hydroflattened DEMs directly from airborne point cloud data has been posted in the GRASS tutorials site... There is a link in the tutorial to a more detailed version on Zenodo.
Be sure to check out the other tutorials on the recently renewed tutorial site…”
#opensource #GRASS #GRASSGIS #spatial #mapping #tutorial #free #onlinelearning #learning #selflearning #tutorials #spatialanalysis #tools #download #Windows #LINUX #MacOS #Docker #sampledata
@grassgis

Paulo Jan 17

I've created two new GRASS addons to facilitate the exchange of raster styles between QGIS and GRASS: r.colors.qml and `r.colors.toqml`.

🎨 r.colors.qml: Apply QGIS QML style files directly to your GRASS rasters.
🔄 r.colors.toqml: Export GRASS color tables and categories back to QML for use in QGIS.

Read the full post here! 👇
https://ecodiv.earth/post/use_qml_in_grass/

#gis #QGIS #grassgis #OpenSource #Cartography @grassgis

Digital Geography Lab Nov 17

#30daymapchallenge Day 17: A new tool
Helsinki enjoyed a grand total of 12 minutes of sunshine in November (1.–13.11). No better time to remember that yes, the sun does still exists.

This map shows Helsinki's shadiest / sunniest places in June. New tool? #GRASSGIS solar irradiance model.

By: @tadusko
#GIS #dataviz

Eugene Nov 11

🌊 Modeling a potential dam breach — and how panic spread beyond the real watershed

This project assessed the potential consequences of a dam failure at a mine-water impoundment in the Svystunova Gully.

🔹 Reconstructed the original pre-impoundment terrain from archival topographic maps.
🔹 Used Sentinel-based land-cover classification to assign variable Manning’s roughness coefficients.
🔹 Built a modern DEM including the dam structure and current flooded zone.
🔹 Simulated dam-break flood dynamics in GRASS GIS — frame by frame.
🔹 Produced a video visualization to help local communities understand real risks (and ignore fake ones).
🔹 The results were later featured in regional media and used in discussions about mine-water safety.

🎥 Watch the short video visualization:
🔗 https://youtu.be/JTcCLXqvWlE?si=NS7ly7UAZu1XttWy

#Hydrology #DamSafety #GIS #GRASSGIS #MineWater #HydrodynamicModeling #GeospatialAnalysis #EnvironmentalRisk #OpenScience #IndependentResearch #SvystunovaGully

Dam Break Simulation with GRASS GIS

YouTube

Show thread

Markus Neteler Oct 9

@FOSSGISeV @osgeo

Herzlichen Glückwunsch an den FOSSGIS e.V. zu 25 Jahren Engagement für freie GIS-Software und offene Geodaten!

Ich erinnere mich noch gut an die Anfangszeit der GRASS Anwender Vereinigung (GAV). Seitdem ist der FOSSGIS-Verein wunderbar gewachsen und @grassgis stark modernisiert mit neuem User Interface, Effizienz und aktiver Entwicklergemeinschaft.

Auf die nächsten 25 Jahre offener Zusammenarbeit und Innovation! 🤩

#FOSSGIS #OSGeo #GRASSGIS #OpenSource #GIS #Community