You're reading from QGIS Python Programming Cookbook, Second Edition Automating geospatial development

Product type Paperback

Published in Mar 2017

Publisher Packt

ISBN-13 9781787124837

Length 464 pages

Edition 2nd Edition

Languages

Python

Tools

Eclipse

Concepts

Geospatial Analysis

Author (1):

Joel Lawhead

View More author details

Table of Contents (10) Chapters

Preface

1. Automating QGIS FREE CHAPTER

2. Querying Vector Data

3. Editing Vector Data

4. Using Raster Data

5. Creating Dynamic Maps

6. Composing Static Maps

7. Interacting with the User

8. QGIS Workflows

9. Other Tips and Tricks

Automatically starting the Python console

As you become familiar with programming QGIS using Python, you'll want the Python console to always be available in QGIS. So, in this recipe, we'll add a Python startup script to QGIS to make sure the console starts when QGIS does.

Getting ready

First, you need the startup.py file, which QGIS will read at startup. You'll be able to use this file to customize different aspects of QGIS:

In your user directory, locate the hidden .qgis2 folder.
Your user folder is typically located in ~/.qgis2 on Linux and OSX and C:\Users\<username>\.qgis2 on Windows, which you can also access the %USERPROFILE% environment variable.
Create a Python file named startup.py.

How to do it...

Open the startup.py file you created.

Add the following lines to it:

        from console import console 
        console.console_show()

How it works...

When QGIS starts, it looks for a Python script named startup.py in the user's folder and executes any code it finds there. If you have an error in the file, QGIS will display an error dialog and disable Python within QGIS.

Tech Concepts

Programming languages

Tech Tools

Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.

Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.

50+ new titles added per month and exclusive early access to books as they are being written.

You have been reading a chapter from

QGIS Python Programming Cookbook, Second Edition - Second Edition

Published in: Mar 2017

Publisher: Packt

ISBN-13: 9781787124837

A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.

Unlock this book and the full library FREE for 7 days

Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of

Start free trial

Renews at €18.99/month. Cancel anytime

Authors (1)

Joel Lawhead

Joel Lawhead is a PMI-certified Project Management Professional (PMP), a certified GIS Professional (GISP), and vice president of NVision Solutions, Inc., an award-winning firm specializing in geospatial technology integration and sensor engineering for NASA, FEMA, NOAA, the US Navy, and many other commercial and non-profit organizations. Joel began using Python in 1997 and started combining it with geospatial software development in 2000. He has authored multiple editions of Learning Geospatial Analysis with Python and QGIS Python Programming Cookbook, both from Packt. He is also the developer of the open source Python Shapefile Library (PyShp) and maintains a geospatial technical blog.

See other products by Joel Lawhead