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#foss4g

2 posts2 participants0 posts today
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Adam Steer

@qgis + #DroneDB #microtootorial

You have some drone images over a transect and want to get the approximate area covered [1]

Use #DroneDB CLI (docs.dronedb.app/docs/cli) to generate image footprints:

ddb info ./jpg/*.JPG -f geojson --geometry polygon -o footprints.geojson

Drop the footprint geojson into QGIS [2]. Dissolve them (Vector -> Geoprocessing Tools -> Dissolve) [3].

Reproject the result to a CRS in metres (eg UTM) and label with $area [4]

Done!

[1] Drone images in a transect. The images must have GPS metadata - position and also orientation
[2] Image footprints from DroneDB CLI as black outlines. You will need to adjust the styling for this effect
[3] Dissolved image footprint polygons as a single purple polygon
[4] Dissolved footprints, reprojected to a CRS expressed in metres and labelled with the $area. The label field reads: to_string(round($area,2)) || ' square metres' ...which rounds the $area attribute to 2 decimal places, converts it to a string, then concatenates it with the context string contaning units.
#droneMapping#FOSS4G#gischat
Public
Robin Wilson

If I wanted to persuade someone who only knows ArcGIS/ESRI products that they should look at QGIS/open-source tools, what particular features should I point to? Aside from being free and open-source - what wow features do they have? What can you do easily that you can't in Arc?

(I don't really know what Arc/ESRI is like these days as I haven't used it for over a decade)

#gis#gischat#foss4g
Public
GRASS GIS

🚀𝗚𝗥𝗔𝗦𝗦 𝗚𝗜𝗦 𝟴.𝟰.𝟭 𝗶𝘀 𝗛𝗲𝗿𝗲!🚀

We're thrilled to announce the release of GRASS GIS 8.4.1. This release brings crucial fixes and improvements to our tools, libraries, and GUI, ensuring a more stable and robust experience.

🔗 Visit grass.osgeo.org/news/2025_03_0 to learn more!

💻 Download the latest version: grass.osgeo.org/download/

Thanks to all contributors and financial supporters! 🙌

#OSGeo #foss4g #GRASS #OpenSource #GeospatialInnovation
grass.osgeo.org/download/

grass.osgeo.orgGRASS GIS - Bringing advanced geospatial technologies to the worldGRASS GIS is a powerful engine for raster, vector, and geospatial processing, enabling advanced modeling, data management, imagery processing, and time series analysis with a Python API, optimized for large-scale analysis.
Public
FOSS4G Europe

📣The deadline for submitting proposals for the FOSS4GE 2025 workshops is quickly approaching — just two weeks remain! Be sure to submit your proposals by January 19.

🗨️These workshops offer practical, hands-on sessions designed to help participants acquire new skills in using FOSS4G software.

For more information on submission guidelines, please visit 👉 2025.europe.foss4g.org/call-fo
#FOSS4GE2025 #FOSS4GE #FOSS4G #mostar #osgeo

Green and white graphic for FOSS4GE workshops submission, highlighting 4-hour slots and a deadline of January 19.
Public
GRASS GIS

#GRASSGIS will also be present at #FOSS4G Asia! 🤩 Don't miss one of the keynotes by @neteler tomorrow! 🙌

✨ 𝗖𝗲𝗹𝗲𝗯𝗿𝗮𝘁𝗶𝗻𝗴 𝗳𝗼𝘂𝗿 𝗱𝗲𝗰𝗮𝗱𝗲𝘀 𝗼𝗳 𝗶𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝗼𝗻: 𝗧𝗵𝗲 𝗚𝗥𝗔𝗦𝗦 𝗚𝗜𝗦 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 🌾
talks.geoinfo-lab.org/foss4g-a

Join us to celebrate the remarkable journey of GRASS GIS and explore its exciting future!

🌏 More info: foss4g.asia/2024/

talks.geoinfo-lab.orgCelebrating four decades of innovation: The GRASS GIS Project FOSS4G-Asia 2024The GRASS GIS project, a pioneering open-source geographic information system, celebrated its 40th anniversary in 2023. As one of the long-standing contributors, I am honored to reflect on the remarkable journey of this leading open-source geospatial software and community. Over the past four decades, GRASS GIS has grown from a modest project initiated by the U.S. Army Corps of Engineers to a robust, globally recognized platform for geospatial analysis and modeling. This evolution is a testament to the dedication and collaborative spirit of the GRASS community, which has continually driven innovation and excellence. My personal relationship with GRASS GIS began over thirty years ago when I was a student and first encountered its powerful capabilities. Even then, I was fascinated by its potential to revolutionize spatial analysis and environmental modeling. With the advent of the Internet, we were able to build a passionate community behind the project. Through collaborative efforts, we have significantly expanded the functionality of GRASS GIS, improved its user interface through multiple iterations, and ensured its adaptability to the ever-changing technological landscape. In this keynote, I will reflect on the milestones that have shaped GRASS GIS from its inception at the U.S. Army Corps of Engineers' Construction Engineering Research Laboratory (USA/CERL) to its current status as a cornerstone of the open-source geospatial ecosystem. The latest releases of GRASS GIS include thousands of changes, including the new single-window GUI layout and enhanced parallelization capabilities. These enhancements underscore our commitment to improving the user experience and computational efficiency. The past decade has also been marked by vibrant community engagement through the OSGeo Foundation. I will highlight key contributions from the global community, showcase groundbreaking research and applications, touch on FOSS business models, and explore the challenges we have overcome along the way. The future of GRASS GIS is bright as we anticipate further innovation and expanded applications, driven by the same collaborative ethos that has defined our past. Together we will continue to push the boundaries of what is possible in geospatial analysis, ensuring that GRASS GIS remains at the forefront of this dynamic field.
#OSGeo#OpenSource#Innovation
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