Adding a world file to a map image
Exporting a map as an image removes all of its spatial information. However, you can create an external text file, called a world file, which provides the georeferencing information for the raster image so that it can be used by GIS software, including QGIS, as a raster layer. In this recipe, we'll export a map composition as an image and create a world file along with it.
Getting ready
You will need to download the zipped shapefile from https://github.com/GeospatialPython/Learn/raw/master/Mississippi.zip and extract it to your qgis_data directory in a subdirectory named ms.
In addition to the shapefile, you will also need the MapComposer class, to simplify the code needed to add this one element. If you have not ...
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