[fitsbits] Images getting shifted and wrapping on themselves...?

[Harro Verkouter]

Hi gberz3,

I would look at the CRPIXn value - which defines the reference pixel for 
axis #n. A non-zero (or non-one) value [I forget if it's zero or 
one-based] would appear as a shift in the axis: the value of this 
keyword defines the 'logical' zero-point on axis #n.

hth,

harro verkouter

gberz3 wrote:
> Hi All,
> 
> I have written an application to read FITS files.  I now have an
> anomaly where some images have a "split" in them.  Basically it
> appears that the image is shifted to the right or left by so many
> pixels and "wraps" around.  This doesn't happen, however if I open it
> in GIMP using the FITS plugin, or with various other FITS Viewers.
> I'm curious as to what could be happening.  Is there some type of
> "key" in the data that would tell me about a particular offset?  I've
> checked headers between "good" files and the "split" ones and there
> seems to be no relevant differences.  In fact, most of the split
> images only have SIMPLE, BITPIX, NAXIS, NAXIS1, NAXIS2, and no other
> data.
> 
> Any input would be most appreciated.
> 
> 
> Best!
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