Book Image

QGIS Python Programming Cookbook, Second Edition - Second Edition

By : Joel Lawhead
Book Image

QGIS Python Programming Cookbook, Second Edition - Second Edition

By: Joel Lawhead

Overview of this book

QGIS is a desktop geographic information system that facilitates data viewing, editing, and analysis. Paired with the most efficient scripting language—Python, we can write effective scripts that extend the core functionality of QGIS. Based on version QGIS 2.18, this book will teach you how to write Python code that works with spatial data to automate geoprocessing tasks in QGIS. It will cover topics such as querying and editing vector data and using raster data. You will also learn to create, edit, and optimize a vector layer for faster queries, reproject a vector layer, reduce the number of vertices in a vector layer without losing critical data, and convert a raster to a vector. Following this, you will work through recipes that will help you compose static maps, create heavily customized maps, and add specialized labels and annotations. As well as this, we’ll also share a few tips and tricks based on different aspects of QGIS.
Table of Contents (16 chapters)
QGIS Python Programming Cookbook - Second Edition
About the Author
About the Reviewer
Customer Feedback


QGIS has been built using the comprehensive graphical user interface framework called Qt. Both QGIS and Qt have Python APIs. In this chapter, we'll learn how to interact with the user in order to collect and display information outside the default QGIS interface. Qt has excellent documentation of its own. Since QGIS is built on top of Qt, all of this documentation applies to QGIS. Note that it is now possible to build QGIS with Qt version 5, which has a different API. Most packaged distributions of QGIS use Qt4, which is the focus of this book. You can find the Qt documentation at