Using pie charts for symbols
QGIS has the ability to use dynamic pie charts as symbols describing the statistics in a given region. In this recipe, we'll use pie chart symbols on a polygon layer in QGIS.
Getting ready
For this recipe, download the following zipped shapefile and extract it to a directory named ms in your qgis_data directory from https://github.com/GeospatialPython/Learn/raw/master/County10PopnHou.zip.
How to do it...
As with other renderers, we will build a symbol layer, add it to a renderer, and display the layer on the map. The pie chart diagram renderers are more complex than other renderers but have many more options. Perform the following steps to create a pie chart map:
- First, we import the PyQt GUI library:
from PyQt4.QtGui import ...
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