[daip] Re: OGEOM problems

[Eric Greisen]

Your mistake is to interpolate images by simple interplation means
when they are udersampled by an order of magnitude (min is 2.4 pixels
per cell in X and in Y or about 6 in area) and they can be
interplaoted correctly only by FFT means).  OGEOM, LGEOM, et al are
simple interpolators and if you put all the flux in one pixel and then
shift by a half a correct result would be 0.0.

I agree that some warning about undersampled images is needed.  But I
would argue that if this is important to your science the onus was on
you to test things.

Eric Greisen