Represents a single lookup table for a Paper IV distortion transformation.
Returns the offset from the distortion table for pixel point (x, y).
double array[naxis]
Coordinate increments (CDELTia) for each coord axis.
If a CDi_ja linear transformation matrix is present, a warning is raised and cdelt is ignored. The CDi_ja matrix may be deleted by:
del wcs.wcs.cd
An undefined value is represented by NaN.
double array[naxis]
Coordinate reference pixels (CRPIXja) for each pixel axis.
double array[naxis]
Coordinate reference values (CRVALia) for each coordinate axis.
float array
The array data for the DistortionLookupTable.