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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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Toc

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

Collecting field data

For decades, collecting field observation data from the field into a GIS required hours of manual data entry or, at best, loading data after a trip. Smartphones and laptops with cellular connections have revolutionized this process. In this recipe, we'll use a simple but interesting GeoJSON-based framework to enter information and a map location from any Internet-connected device with a web browser to update a map in QGIS. Note that this example will post the location of the device you are using to a publicly visible website. The information is anonymous but it is visible to anyone.

Getting ready

There is no preparation required for this recipe.

How to do it...

We will load a world boundaries layer and the field data layer onto a QGIS map. Go to the field data mobile website and create an entry, and then refresh the QGIS map to see the update. To do this, we need to perform the following steps:

  1. In the QGIS Python console, add the following GeoJSON layers...
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