Stessa operazione su più layer in QGIS? Usa i modelli

If you repeat the same sequence of operations in QGIS every time the input data changes, you're wasting time. Templates allow you to encapsulate that sequence (validity check, geometry correction, calculation for each polygon) and relaunch everything with a double-click, on any data, as many times as you like. In this episode of QGIS in action, created with the guys from @GterGeomatica, see how the models work in practice on real data: a DTM of Liguria and the boundaries of Ligurian municipalities. Part 1 — Ready-made Models from hub.qgis.org How to find and download ready-made models from the QGIS resource hub Where to install the .model3 file on Windows and macOS How to have QGIS recognize the model and find it in the Processing Toolbox Part 2 — Model Designer: Build your model from scratch (a practical example) How to open the Model Designer and organize models into groups How to define the input and add algorithms sequentially: Check Validity → Fix Geometries → Merge Vector Layers How to define the model output and save it How to chain two models sequentially Templates are no substitute for knowledge of QGIS algorithms; you need to know what you're sequencing. But if you already have a clear workflow, the Model Designer can save you a lot of time. Folder paths for .model3 files Windows: %APPDATA%\QGIS\QGIS3\profiles\default\processing\models\ macOS: ~/Library/Application Support/QGIS/QGIS3/profiles/default/processing/models/ 🎓 GTER TRAINING QGIS in Action is a project developed together with @GterGeomatica, trainers specializing in QGIS and geographic information systems. If you'd like to learn more about QGIS (basic, advanced, Python) or other geospatial topics, you can find their training offerings here: 👉 https://www.gter.it/formazione With the code 3DMETRICAGTER, you get a €30 discount on any course. Gter Telegram channel → updates and Geobreak (free events): https://t.me/geobreak 📢 ANY CONTENT TO RECOMMEND? If you're working with QGIS and have a recurring problem or a workflow that's not working for you, let us know in the comments. Let's get started on future episodes. 📬 CONTACTS LinkedIn → paolo.corradeghini Telegram → https://t.me/paolocorradeghini Email → [email protected] If you want to support 3DMetrica and its free content, you can do so on Patreon: www.patreon.com/3dmetrica 0:00 Intro 0:47 DTM and Ligurian Municipalities 1:27 hub.qgis.org 2:57 Installing and Using the .model3 4:47 Running the Model 6:32 QGIS in Action and GTer 9:01 Model Designer 12:26 Check Validity 14:15 Fix Geometries 16:13 Merge Vector Layers and Model Output 19:32 Saving, Running, and Concatenating Models 22:1:25 Outro