Converting a TIFF image to a JPEG image
Image format conversion is a part of nearly every geospatial project. Rasters come in dozens of different specialized formats, making conversion to a more common format a necessity. The GDAL utilities include a tool called gdal_translate
specifically for format conversion. Unfortunately, the algorithm in the Processing Toolbox is limited in functionality. For format conversion, it is easier to use the core GDAL API.
Getting ready
We will use the SatImage raster available at https://geospatialpython.googlecode.com/files/SatImage.zip.
Place this raster in your /qgis_data/rasters directory.
How to do it...
In this recipe, we'll open a TIFFimage using GDAL and copy it to a new dataset as a JPEG2000 image, which allows you to use the common JPEG format while maintaining geospatial information. To do this, we need to perform the following steps:
Start QGIS.
From the Plugins menu, select Python Console.
Import the gdal module:
from osgeo import gdalGet a GDAL driver...
