[fitsbits] CRPIX clarification

[Rob Seaman]

> To clarify that, the statement could be changed to "(e.g. as is done
> for the random parameters using PTYPEn in random groups data)".  The
> whole point is that they are *random*, i.e. don't form a regular
> structure, and so provide an excellent contrast to the regular lattice
> structure associated with images.

The question is whether this discussion of randomness adds anything to  
the specific paragraph.  Isn't the distinction here between a  
repeating lattice and an individual datum, not between regular and  
random structure?

Rob