I have two raster classifications. They have the same number of classes which use the same ID (each class has a unique ID). I would like to get information on the changes between classes i.e., class 2 has changed to class 4 for polygon X. I would also like to calculate area for these changes (to be able to see which class has experienced the most change).
How would you do it in QGIS?
(The equivalent in ENVI is the 'Thematic change' tool)