iraf.net

NUMBER:	232
MODULE:	images.geomap
SYSTEM:	V2.9
DATE:	Wed Dec 29 16:39:24 MST 1993
FROM:	davis

BUG:	Geomap was computing an incorrect coordinate transformation if the
	functional form of the coordinate transformation was 'chebyshev'
	or 'legendre' x fit x or y order was > than 2 and the y fit was
	linear (x and y order equal to 2), or if the y fit x or y order
	was > 2 and the x fit was linear (x and y order equal to 2).
	This was occurring because geomap was incorrectly redefining the
	functional form of the linear fit to be 'polynomial'.

STATUS:	Fixed in 2.10.3. There is no direct workaround but setting the
	cross terms parameter of the linear fit to 'yes' will avoid
	the problem at the expense of computing one extra term in the fit.