#grassgis — Public Fediverse posts

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

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

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

🌊 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

The GRASS Developer Summit is happening next week 🎊🥳🎉 We’re excited to see you 🫵 there!!

#grass #grassgis #gis #ncsu #foss #osgeo #summit #gopack #nsffunded

Physically-Based Hydrologic Modeling Using GRASS GIS - r.topmodel [tutorial]
--
https://workshop.isnew.info/omu-2024-r.topmodel/ <-- link to technical resource / workshop / tutorial
--
“This workshop will introduce r.topmodel (Cho 2000), the GRASS GIS module for a physically-based hydrologic model called TOPMODEL (Beven 1984)..."
#GIS #spatial #mapping #water #hydrology #Hydrologic #model #Modeling #GRASS #GRASSGIS #topmodel #workshop #tutorial #onlinelearning #TopographyModel #catchments #R #SAGA #module #ISPSO #particleswarmoptimization #algorithm #continuingeducation

📣 We've started planning the #GRASSGIS Developer Summit 2025! 🤩

🗓️ Mark your calendars for May 19-24, 2025!
🗺️ @ncsugeospatial, Raleigh NC

📝 Help us plan better by filling in this interest form 👇

#NSFfunded #opensource #development
https://forms.gle/uzQqgayYC7F4kLCZ8

👩‍💻🍕 Fuel our code sprint at the #GRASSGIS Community Meeting with food! Just $10 can provide a meal that fuels a new feature or bug fix. Donate here: opencollective.com/osgeo/projects/grass 🍔💡

#CodeFuel #foss #qgis #growgrass

Thanks to our sponsors for making this gathering possible! US NSF @osgeo @FOSSGISeV
https://opencollective.com/osgeo/projects/grass

Check out the new global tree canopy height map by Meta and the World Resources Institute (https://sustainability.fb.com/blog/2024/04/22/using-artificial-intelligence-to-map-the-earths-forests/). See https://ecodiv.earth/post/treeheightmap/ for a description of how to import the map for your area of interest in #grassgis and get a map with acquisition dates.

Be careful when using the data for your analysis, though. Some patterns clearly reflect differences in the dates of acquisition of the source imagery, rather than actual differences on the ground.

#CHM #WRI #META @grassgis #opendata

@mundialis @terrestris

Letzte Vorbereitungen für die spannende @FOSSGISeV 2024 Konferenz ab Morgen in Hamburg!

Ich freue mich auf spannende Vorträge, Workshops und Gespräche, bis morgen!

#fossgis2024 #hamburg #osgeo #actinia #leafmap #grassgis

📢 GRASS GIS is launching a new Mentoring Program to help students, researchers, and software developers integrate GRASS GIS into their projects. More info at:
https://grass.osgeo.org/news/2023_10_11_mentoring_program_announced/

#NSFfunded #GRASSGIS #gischat

Missed the first session about the new #NSFfunded project to support and expand the #GRASSGIS community? You have a second chance! 🚀

🗓️Fri 22nd, 10am EST
🔗Join at https://lists.osgeo.org/pipermail/grass-user/2023-September/083428.html

#opensource #community #foss #gischat

If you want to learn more about the #NSFfunded project to support and expand the #GRASSGIS community. Thu, 2pm EST or Fri, 10am EST. Join at https://lists.osgeo.org/pipermail/grass-user/2023-September/083428.html

@wenzeslaus @huidaecho

Learn more about the #NSFfunded project for #GRASSGIS ecosystem. Two different times of day to choose from on Sep 21 and 22. See details at https://lists.osgeo.org/pipermail/grass-user/2023-September/083423.html

@wenzeslaus @huidaecho

🎉 Researchers from NC State University, Arizona State University, New Mexico State University and Yale announce a significant new #NSFfunded project to support and expand #GRASSGIS community 🎉

https://grass.osgeo.org/news/2023_09_06_nsf_grant_awarded/

@wenzeslaus @huidaecho