I have made quite a big georeferencing error, by attributing one of the control points of the map with a value that is 2 km less than the actual value, on the horizontal axis. The georeferenced map looked more like a right-angle trapezoid. I realized this only after digitizing.
Can I tweak/adjust somehow the digitized lines so they become correct according to the new shape of the map?
I have imagined rescaling around a point that is different than the center of the map, in Global Mapper, but I seem to be long way off achieving anything.