QGIS Python Programming Cookbook by Joel Lawhead

Author:Joel Lawhead [Lawhead, Joel]
Language: eng
Format: epub, pdf
Publisher: Packt Publishing
Published: 2015-03-25T22:00:00+00:00

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To learn more about what is possible with pie chart diagram symbols, you can experiment with this recipe in the Script Runner plugin, where you can change or remove settings and quickly re-render the map. You can also manually change the settings using the QGIS dialogs and then export the style to an XML file and see what settings are used. Most of them map to the Python API well.

Using the OpenStreetMap service

Cloud-based technology is moving more and more data to the Internet, and GIS is no exception. QGIS can load web-based data using Open GIS Consortium standards, such as Web Map Service (WMS). The easiest way to add WMS layers is using the Geospatial Data Abstraction Library (GDAL) and its virtual filesystem feature to load a tiled layer.

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