FromAIS:
PROC [name:
ROPE]
RETURNS [PixelArray];
... makes a pixel array from an AIS file with the specified name.
! ImagerError.Error if the named file cannot be opened.
! ImagerError.Error[[$syntax, ...]] if the file is not a valid AIS file.
Join3AIS:
PROC [name1, name2, name3:
ROPE]
RETURNS [PixelArray];
A convenience, equivalent to Join3[FromAIS[name1], FromAIS[name2], FromAIS[name3]].
! ImagerError.Error, as for FromAIS or Join.