On Thu, Jun 26, 2008 at 2:52 PM, Jean-Claude Repetto <jrepetto at free.fr> wrote: > Hi, > > Is there a GUI that allows entering GCPs graphically and then calls > gdalwarp to calibrate a map ? As third-party tool, QGIS (www.qgis.org) offers a graphical interface to such functionality. Internally it calls gdalwarp. Markus