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FITS long integer support (was [fitsbits] ADASS FITS BoF onSunday)
As an old FITS person, let me remind you that FITS is first for data
exchange. Since many operating systems and compilers do not support 64-bit integers (other than in sneaky hidden ways to read large files), we should move extremely slowly to explicitly allow them in FITS. I cannot code my machines to read or use these things, so you cannot code your data in them if you wish my software (used lots of places) to understand you. I suppose I could convert a 64-bit image into double precision float which would be inaccurate but usable. But an NAXISn or a pointer in a heap table - those must be accurate or they do not work at all. FITS has always been practical rather than "modern" - let's keep it that way. Eric Greisen |
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