Is there any tool or plugin for QGIS/GRASS to make an automatic land cover classification from satellite imagery --- based on CLC nomenclature for example? Of course, it will not be 100% sure but it would be a first step of the classification process.
I have seen a similar tool expressed into a pdf file on the QGIS blog, but it seems the plugin has not been implemented (at least, not listed into the plugin repository).
I have also the existence of the Molusce plugin. I haven't tested it yet but the approach seems to be based on land use changes.