QGIS User Conference 2026

Tag: qgis

Revue de presse du 9 octobre 2026

Une GeoRDP d'automne, avec des géotrucs parfois concrets et à picorer, façons géotapas divers et variés.
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From CAD to GIS: When you need to make the transition

Discover why and how to transition your engineering drawings from CAD to GIS for improved asset management, spatial querying, and real-world accuracy.
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NDVI vs EVI, SAVI, NDRE and NDWI: Formulas for QGIS

NDVI flattens out over dense canopy. EVI, SAVI, NDRE, NDWI and NDMI each fix a blind spot. Raster Calculator formulas and a measured test in Brazil.
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Satellite Image Resolution Compared: 30 m to 30 cm, Free vs Paid

8 sources from Landsat to Pléiades Neo, with price and revisit. On one suburb, 0.2% of buildings cover 16 pixels at 10 m and 96% at 50 cm, of 20,911 counted.
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Sentinel-2 vs Landsat 8 and 9: Bands, Resolution, Clear Days

10 m vs 30 m, 5-day vs 8-day revisit, 13 vs 11 bands. Over one year near Rennes, Sentinel-2 gave 53 clear days and Landsat 30, with waits up to 33 vs 79 days.
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Embed Interactive Maps on Websites with Kumoy - QGIS LAB by MIERUNE

Introduction When you show a QGIS map on a web page as an image, viewers cannot pan to the place they care about or zoom in for detail. Building a web map from scratch is another option, but it requir...
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ChatGPT for QGIS: What It Can and Can't Do, Tested

Can ChatGPT automate QGIS? I asked it for PyQGIS code on three real tasks and ran every script in QGIS. What worked, what failed without an error, and why.
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What Is a CRS in GIS? EPSG Codes and Fixing Wrong Layers

A CRS tells software where coordinates sit on Earth. Datums, EPSG codes, 4326 vs 3857, and a step-by-step fix for a layer that lands in the wrong place.
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What Is NDVI? Formula, Value Chart and the Sentinel-2 Trap

NDVI = (NIR - Red) / (NIR + Red), from -1 to 1. What each value range means, a season measured field by field, and the offset that turns 0.82 into 0.56.
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What Is PyQGIS? A First Script and a Chatbot Code Test

Where to run PyQGIS, a first script, and a test on six tasks: chatbot code always ran, but one result was silently wrong when given only layer names.
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