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QGIS Python Programming Cookbook, Second Edition

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

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Product type Paperback
Published in Mar 2017
Publisher Packt
ISBN-13 9781787124837
Length 464 pages
Edition 2nd Edition
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Author (1):
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Joel Lawhead Joel Lawhead
Author Profile Icon Joel Lawhead
Joel Lawhead
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Table of Contents (10) Chapters Close

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

Running QGIS scripts as scheduled tasks

The theme of this book is using PyQGIS to automate QGIS to transform it from a desktop application into a framework. Most of the time, when you are automating a process, you do so because you want to repeat that workflow over and over again. If the workflow is fairly static, with only a few simple variables, you can even automate running that task on a schedule. In this recipe, we'll automate downloading some precipitation data, and clipping it to a political boundary. Then, we'll set up that process to run automatically on a periodic basis.

Getting ready

We'll be creating a standalone QGIS script. So, you'll need to create a Python file and open it in a text editor.You will also need to install the Python pytz and schedule modules, both available on PyPI. Finally, you'll need to download the following zipped shapefile and extract it to a directory named ms in you qgis_data directory:

https://github.com/GeospatialPython...

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