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Tag: qgis

Detect Solar Panels in QGIS: 5 Methods

Check OpenStreetMap first. Then four ways to map rooftop PV from aerial imagery in QGIS, with the menu paths and where each one fails.
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Detect Swimming Pools in QGIS: 5 Methods

Start with QuickOSM on leisure=swimming_pool. Where the map is thin, use a segmentation model, threshold the blue, or run a water index. Five methods compared.
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Extract Roads in QGIS: 6 Methods, OSM Checked in 4 Towns

Start with QuickOSM: in four French towns OSM held 96 to 98% of paved road length. Where it is thin, five more methods and the line-or-surface choice.
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Map Tree Canopy in QGIS: 6 Methods, Free and Paid

For multispectral imagery, threshold NDVI in the raster calculator, then polygonize. Six methods, what each one needs, and what a canopy layer costs.
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Turn a Satellite Image into a Site Plan in QGIS

Load imagery in QGIS, draw a zone, and get a georeferenced four-class site plan back in under a minute. The manual route, the AI route, and where each breaks.
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How to share your QGIS models easily

Discover 5 ways to share your QGIS models: from the paper plane method to plugin integration !
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How to Redesign a Street in QGIS: 5 Methods

Five ways to show a street rebuilt, from hand-drawn vector layers to a generated aerial view. Only one gives back a picture that stays on the map.
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How to Simulate a Flood in QGIS: 5 Methods

From the official hazard map to a generated aerial view of the water. Which method gives a number, which gives a picture, why an elevation model changes both.
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[Blog] Take your QGIS projects to the web: Now with map themes and JS customizations

Mergin Maps simplifies QGIS project sharing with automated webmaps. Recent updates include support for layer trees, map themes, custom JavaScript integrations, a redesigned full-screen interface, and the ability to embed interactive maps directly into websites.
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Convert Raster to Vector in QGIS: 5 Methods, Clean Edges

For a classified raster, use Raster > Conversion > Polygonize. Here are the five methods, the fix for staircase edges, and what to do with a photograph.
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