iraf.net

NUMBER:	368
MODULE:	images.geotran
SYSTEM:	V2.10
DATE:	Tue Apr 29 16:46:38 MST 1997
FROM:	davis

BUG:	Geotran fails if the user: 1) sets any of xmin, xmax, ymin, ymax
	explicitly, and 2) xmin > xmax or ymin > ymax. The failure is
	occuring because the computed number of columns or lines is
	negative in that case.

STATUS:	Fixed for 2.11. The workaround is to always ensure that xmin < xmax
	and ymin < ymax and perform any image flipping after the fact.