Hi all,

Is it possible to do a first order GCP-warp *without* shearing? I have a rectangular scan with very imprecise control points, and I want it georeferenced without any distortion. With a first order gdalwarp I get back a map in the form of a parallellogram. Is there a way to get back the original rectangular form? Control points will be way off, of course, but I am interested in the original forms of the mapped items.

Jan
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