SUBROUTINE GDF_READX (Islo,Error)
SUBROUTINE GDF_READY (Islo,Error)
SUBROUTINE GDF_READZ (Islo,Error)
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GDF Read Header of the X, Y or Z common area from image slot Islo
ISLO Integer Image Slot number
ERROR Logical Error Flag
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SUBROUTINE GDF_WRITX (Islo,Error)
SUBROUTINE GDF_WRITY (Islo,Error)
SUBROUTINE GDF_WRITZ (Islo,Error)
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GDF Write Header from the X, Y or Z common area to image slot Islo
ISLO Integer Image Slot number
ERROR Logical Error Flag
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SUBROUTINE GDF_CHXY, GDF_CHYZ, GDF_CHXZ
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GDF Copy Header of the X, Y or X common into Y, Z, Z respectively
and move memory pointers accordingly.
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