Creating raster footprints
A common way to catalog the raster datasets that consist of a large number of files is by creating a vector dataset with polygon footprints of the extent of each raster file. The vector footprint files can be easily loaded in QGIS or served over the Web. This recipe demonstrates a method to create a footprint vector from a directory full of raster files. We will build this program as a Processing Toolbox script, which is easier to build than a QGIS plugin and provides both a GUI and a clean programming API.
Getting ready
Download the sample raster image scenes from https://github.com/GeospatialPython/Learn/raw/master/scenes.zip. Unzip the scenes directory into a directory named rasters in your qgis_data directory.
For this ...
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