Handling NDF (and Array) Sections

NDF_BASE( INDF1, INDF2, STATUS )
-- Obtain an identifier for a base NDF

NDF_BLOCK( INDF1, NDIM, MXDIM, IBLOCK, INDF2, STATUS )
-- Obtain an NDF section containing a block of adjacent pixels

NDF_CHUNK( INDF1, MXPIX, ICHUNK, INDF2, STATUS )
-- Obtain an NDF section containing a chunk of contiguous pixels

NDF_NBLOC( INDF, NDIM, MXDIM, NBLOCK, STATUS )
-- Determine the number of blocks of adjacent pixels in an NDF

NDF_NCHNK( INDF, MXPIX, NCHUNK, STATUS )
-- Determine the number of chunks of contiguous pixels in an NDF

NDF_SECT( INDF1, NDIM, LBND, UBND, INDF2, STATUS )
-- Create an NDF section

NDF_SSARY( IARY1, INDF, IARY2, STATUS )
-- Create an array section, using an NDF section as a template

NDF_XIARY( INDF, XNAME, CMPT, MODE, IARY, STATUS )
-- Obtain access to an array stored in an NDF extension