Welcome to the world of PyQGIS, the blending of Python and QGIS to extend and enhance your open source GIS toolbox. This book covers version 3.0 of the QGIS application programming interface (API), featuring Python 3. With PyQGIS you can write scripts and plugins to implement new features and perform automated tasks. This book will guide you in getting started with PyQGIS. After a brief introduction to Python 3, you'll learn how to understand the QGIS (API), write scripts, and build a plugin. This book is designed to allow you to work through the examples as you go along. At the end of most chapters you will find a set of exercises you can do to enhance your learning experience. You'll also find a wealth of examples and information for performing common tasks, developing a workflow, and debugging your code. The PyQGIS Programmer's Guide is compatible with the version 3.x API released with QGIS 3.0