Introduction to QGIS Python Programming [Video]

Erik Westra
Tuesday, November 29, 2016

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Learn how to analyze and display geospatial information using QGIS and Python

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Video Details

ISBN 139781787121997

Course Length3 hours 32 minutes

Video Description

QGIS is a standalone geographical information system -- that is, an application for viewing, analyzing and editing geospatial data. This video course shows how to leverage QGIS as a tool for developing geospatial applications using Python. Geospatial applications are often very complicated; using QGIS, you can avoid a lot of this complexity by developing at a higher level, making use of many of the tools for viewing, analyzing and editing geospatial data that are provided by the QGIS system. Using these tools, you can build more sophisticated geospatial applications with less time and effort.

Style and Approach

A logically arranged, step-by-step guide that firstly helps you get up to speed with the QGIS ecosystem and then gets right into showing how Python can be used with QGIS to analyse solve various geospatial problems.

Installation and Setup

The Course Overview

Installing QGIS and Python

The QGIS System

Introduction to QGIS

Using Python with QGIS

Using the Python Console as a Window into the QGIS Environment

Examining a Python Plugin

Using the QGIS Python API within an External Application

The QGIS Python Console

Using the Console

Working with Geospatial Data in the Console

Scripting the QGIS User Interface

Understanding the PyQGIS Library

Discovering the QGIS Python API

Important Core Classes

Important GUI Classes

Using the PyQGIS Library

Analyzing Raster Data

Manipulating and Saving Vector Data

Using Different Symbols for Different Features

Calculating the Distance between Two Points

Creating QGIS Plugins

Creating a Simple Plugin

The Plugin Development Process

Distributing Plugins

Writing a Useful Plugin

Possibilities and Limitations of Plugins

Using QGIS in an External Application

Designing a Turnkey Mapping Application

Creating the Lex Application

Drawing the Map

Implementing Panning and Zooming

Implementing "Explore" Mode

Possibilities and Limitations of External Applications

What You Will Learn

Getting familiarized with QGIS
The different ways to make Python interact with QGIS
Examining the QGIS Python Console to see how it can be used as a window into the world of QGIS Python Programming
Diving deeper into the details of the QGIS Python APIW
Writing Python programs that work with QGIS

Authors

Erik Westra

Erik Westra has been a professional software developer for over 25 years, and has worked almost exclusively in Python for the past decade. Erik’s early interest in Graphical User Interface design led to the development of one of the most advanced urgent courier dispatch systems used by messenger and courier companies worldwide. In recent years, Erik has been involved in the design and implementation of systems matching seekers with providers of goods and services across a range of geographical areas, as well as real-time messaging, payment, and identity systems. This work has included the creation of real-time geocoders and map-based views of constantly changing data. Erik is based in New Zealand, and works for companies worldwide. Erik is the author of the following Packt books: Python Geospatial Development (third edition), Python Geospatial Analysis, Building Mapping Applications with QGIS, and Modular Programming with Python. Erik has also authored the video course entitled Introduction to QGIS Python Programming.