Book Image

Learn QGIS - Fourth Edition

By : Andrew Cutts, Anita Graser
Book Image

Learn QGIS - Fourth Edition

By: Andrew Cutts, Anita Graser

Overview of this book

QGIS 3.4 is the first LTR (long term release) of QGIS version 3. This is a giant leap forward for the project with tons of new features and impactful changes. Learn QGIS is fully updated for QGIS 3.4, covering its processing engine update, Python 3 de-facto coding environment, and the GeoPackage format. This book will help you get started on your QGIS journey, guiding you to develop your own processing pathway. You will explore the user interface, loading your data, editing, and then creating data. QGIS often surprises new users with its mapping capabilities; you will discover how easily you can style and create your first map. But that’s not all! In the final part of the book, you’ll learn about spatial analysis and the powerful tools in QGIS, and conclude by looking at Python processing options. By the end of the book, you will have become proficient in geospatial analysis using QGIS and Python.
Table of Contents (8 chapters)

Summary

In this chapter, we covered the different ways to extend QGIS using actions and Python scripting. We started with different types of actions and then continued to the Python console, which offers a direct way to interact with the QGIS Python API. We also used the editor that is part of the Python console panel and provides a better way to work on longer scripts containing loops or even multiple class and function definitions. You can save, share, and load these scripts. Next, we applied our knowledge of PyQGIS to develop custom tools for the Processing Toolbox. These tools profit from Processing's automatic GUI generation capabilities, and they can be used in Graphical modeler to create geoprocessing models. We also developed and deployed a basic plugin based on a Plugin Builder template.

You should now have a feel for the capabilities of extending QGIS. You should...