Tag: tutorial

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

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.

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.

For multispectral imagery, threshold NDVI in the raster calculator, then polygonize. Six methods, what each one needs, and what a canopy layer costs.

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.

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.

Draw a zone, name the object, run it: you get a polygon layer in minutes. Open data, AI detection and hand-digitizing compared, with the filtering step.

SAM outlines an object from a click or a word. Seven QGIS plugins run it: what each costs, which needs an NVIDIA card, and how to install one.

Draw a zone, name the object, get every polygon as a clean vector layer. The full run in QGIS, the three-step review in any order, and Semi-Auto mode.

Turn the aerial imagery in your QGIS canvas into edits, clean maps, and vector data with plain-language prompts, using AI Edit by TerraLab.