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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
Languages
Tools
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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 2. Querying Vector Data FREE CHAPTER 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

Using an outline for font markers


Font markers open up broad possibilities for icons, but a single-color shape can be hard to see across a varied map background. Recently, QGIS added the ability to place outlines around font marker symbols. In this recipe, we'll use font marker symbol methods to place an outline around the symbol to give it contrast and, therefore, visibility on any type of background.

Getting ready

Download the following zipped shapefile. Extract it and place it in a directory named ms in your qgis_data directory:

https://github.com/GeospatialPython/Learn/raw/master/tourism_points.zip

How to do it...

This recipe will load a layer from a shapefile, set up a font marker symbol, put an outline on it, and then add it to the layer. We'll use a simple text character, an @ sign, as our font marker to keep things simple:

  1. First, we need to import the QtGUI library, so we can work with color objects:

            from PyQt4.QtGui import * 
    
  2. Now, we create a path string to our shapefile...

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