Try to geo-reference your image using tie-point then perform a
transformation.
The result will be a geo-corrected image. I believe this is the right
type of image that can be used to digitizing in WLWIS.
The procedures in WLWIS is a bit more complicated than commercial
packages since it was design for learning: user have to do more but
will gain more understanding at the end.
Start with the help under the Digitizing section, then with the User-
guide here, as I remember it should have instruction and even step-by-
step tutorial on most of the Ilwis operation.
http://52north.org/index.php?option=com_content&task=view&id=149&Item...