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.

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Table of Contents (8 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Get in touch
Free Chapter
1
Where Do I Start?
Where Do I Start?
Installing QGIS 3.4
Running QGIS for the first time
What is new in QGIS 3
Introducing the QGIS user interface
Finding help and reporting issues
Summary
2
Data Creation and Editing
Data Creation and Editing
Data formats
Loading data
Interacting with data
Vector data
Raster data
Other data
Summary
3
Visualizing Data
Visualizing Data
Styling data
Styling raster layers
Saving styles
Styling vector layers
Summary
4
Creating Great Maps
Creating Great Maps
Communicating with data
Labeling
Creating a map
Loading data
Summary
5
Spatial Analysis
Spatial Analysis
Processing toolbox
Analyzing raster data
Combining raster and vector data
Advanced vector and raster analysis with processing
Summary
6
Extending QGIS with Python
Extending QGIS with Python
Adding functionality using actions
Getting to know the Python console
Creating custom geoprocessing scripts using Python
Developing your first plugin
3D view
Summary
7
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Extending QGIS with Python

In our final chapter, we will be using Python to extend QGIS 3.4 Python is a very accessible programming language even for beginners. It is used extensively in both the open source and proprietary GIS world. QGIS 3.4 uses Python 3, whereas QGIS 2.x uses Python 2.7. Care should be taken when migrating any existing scripts, since the API has been updated. We will start with an introduction to actions and then move on to the QGIS Python Console before we go into more advanced development of custom tools for the Processing Toolbox. This will be followed by a guide on how to create your own basic plugin. The final topic that we will cover in this chapter is viewing data in 3D.

Topics covered in this chapter include the following:

  • Adding functionality using actions
    • Opening files using actions
    • Opening a web browser using actions
  • Getting to know the Python...
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