> Objective

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• This section shows how to work with Python in QGIS  

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> Index / Table of Contents

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• Introduction  

• Tutorial(s) 

• QGIS Installation  

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> Summary and Highlights

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Introduction 

Python is a popular programming language that can be used in combination with QGIS, allowing the users to perform more functions and automate some tasks.

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Tutorial(s) 

• Introduction to Python  
  Ujaval Gandhi: “Getting Started With Python Programming (QGIS3)”/”Beginnen met programmeren in Python (QGIS3)” 
  Language(s): English, Dutch 
  Chapters: overview of the task, get the data, procedure   
  EN: https://www.qgistutorials.com/en/docs/3/getting_started_with_pyqgis.html 
  NL: https://www.qgistutorials.com/nl/docs/3/getting_started_with_pyqgis.html  

• Run a processing algorithm that calculates the average monthly rainfall for all zip codes in the Seattle area  
  Ujaval Gandhi: “Running Processing Algorithms via Python (QGIS3)”/” Algoritmes van Processing uitvoeren via Python (QGIS3)” 
  Language(s): English, Dutch 
  Chapters: overview of the task, get the data, procedure   
  EN: https://www.qgistutorials.com/en/docs/3/processing_algorithms_pyqgis.html
  NL: https://www.qgistutorials.com/nl/docs/3/processing_algorithms_pyqgis.html  

• Write a Python expression function that determines the UTM zone number of a feature and visualise the UTM zone number when hovering over the map  
  Ujaval Gandhi: “Using Custom Python Expression Functions (QGIS3)”/”Aangepaste Python expressie-functies gebruiken (QGIS3)” 
  Language(s): English, Dutch 
  Chapters: overview of the task, get the data, procedure   
  EN: https://www.qgistutorials.com/en/docs/3/custom_python_functions.html  
  NL: https://www.qgistutorials.com/nl/docs/3/custom_python_functions.html 

• Write a Python script to dissolve a region and calculate the total population in this region 
  Ujaval Gandhi: “Writing Python Scripts for Processing Framework (QGIS3)”/”Python-scripts schrijven voor framework Processing (QGIS3)” 
  Language(s): English, Dutch 
  Chapters: overview of the task, get the data, procedure   
  EN: https://www.qgistutorials.com/en/docs/3/processing_python_scripts.html
  NL: https://www.qgistutorials.com/nl/docs/3/processing_python_scripts.html

• Build a Python plugin that enables to select vector layers and write their attributes to a CSV file  
  Ujaval Gandhi: “Building a Python Plugin (QGIS3)”/”Een plug-in in Python bouwen (QGIS3)” 
  Language(s): English, Dutch 
  Chapters: overview of the task, get the data, procedure   
  EN: https://www.qgistutorials.com/en/docs/3/building_a_python_plugin.html 
  NL: https://www.qgistutorials.com/nl/docs/3/building_a_python_plugin.html 

• Build a processing plugin that enables to select vector layers and write their attributes to a CSV file  
  Ujaval Gandhi: “Building a Processing Plugin (QGIS3)”/” Een plug-in voor Processing bouwen (QGIS3)” 
  Language(s): English, Dutch 
  Chapters: overview of the task, get the data, procedure   
  EN: https://www.qgistutorials.com/en/docs/3/processing_python_plugin.html  
  NL: https://www.qgistutorials.com/nl/docs/3/processing_python_plugin.html

• Write a Python script that downloads a shapefile and run topological cleaning operations on a daily basis  
  Ujaval Gandhi: “Running and Scheduling QGIS Processing Jobs”/”Taken voor QGIS uitvoeren en in schema zetten” 
  Language(s): English, Dutch 
  Chapters: overview of the task, get the data, procedure   
  EN: https://www.qgistutorials.com/en/docs/running_qgis_jobs.html  
  NL: https://www.qgistutorials.com/nl/docs/running_qgis_jobs.html 

• PyQGIS tutorial and reference guide  
  PyQGIS Developer Cookbook  
  Language(s): English  
  Chapters: introduction, loading projects, loading layers, accessing the table of contents (TOC), using raster layers, using vector layers, geometry handling, projections support, using the map canvas, map rendering and printing, expressions, filtering and calculating values, reading and storing settings, communicating with the user, authentication infrastructure, tasks – doing heavy work in the background, developing Python plugins, writing a processing plugin, using plugin layers, network analysis library, QGIS server and python, cheat sheet for PyQGIS  
  https://docs.qgis.org/3.22/en/docs/pyqgis_developer_cookbook/intro.html

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> QGIS Installation

 

Do you still need to install QGIS? The QGIS installation and update section explains how to install QGIS on Windows and macOS.  

 

Useful Links

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QGIS Training Manual

QGIS User Guide

Python website

Python tutorial

PyQGIS Developer Cookbook

Ujaval Gandhi (QGIS Tutorials and Tips website)

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#QGIS, #Python, #PyQGIS plugin