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Tag: tutorial

Download Sentinel-2 Images in QGIS: 4 Free Methods

Stream Sentinel-2 over STAC with no account, or get the L2A product from Copernicus Browser. Four methods tested on farms in Brazil, with timings.
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How to Download OSM Data in QGIS: 4 Methods, Timed

QuickOSM fetched 4,560 buildings in 5 seconds; a whole country timed out. When to use QuickOSM, a Geofabrik .pbf (Kenya in 57 s), Overpass Turbo or an AI agent.
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How to Georeference an Image in QGIS: 3 Ways, on a 1947 Map

Layer > Georeferencer, 8 points, Polynomial 1 and a 34 s warp on a 1947 scan. Which transformation to pick, and why an RMSE of zero hid a map 594 m off.
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LiDAR HD from IGN: download and open in QGIS

The classified LiDAR HD cloud covered 78.4% of France on 6 September 2026, 30,933 of 34,877 communes. Map per commune, products, clicks in QGIS.
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AI Agent for QGIS: The Complete Guide

How to use AI Agent in QGIS: install it, write your first request, find examples and data sources, stay in control, then 5 real tasks, from open data to an HTML report.
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How to Add a Basemap in QGIS: XYZ, WMS, QuickMapServices

Browser panel > XYZ Tiles > double-click OpenStreetMap. Then satellite tiles by URL, QuickMapServices, a national WMS, and the ground size of each zoom.
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Colored site plan: the same block four ways

Flat, watercolor, pencil and glossy, all rendered from one aerial image of Letchworth Garden City. Every prompt in full, and where the model invented water.
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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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