This program can be used to crop or select a sub-area from a cube.
crop parameter selection requires that the area of interest be contiguous.
That is, the program will not allow non-continuous cropping such as lines
1-5, 10-30, and 80-100.
The contiguous area can however be sub-sampled by specifing pixel
increments (or skips). For example every third line (1, 4, 7, 10, ...)
can be written to the output cube using a line increment (LINC) of three.
A sample increment to use when extracting from the input cube.
This effectively skips samples. For example if SINC=2 and SAMPLE=1
the output cube would contain samples 1,3,5,7, and so on. Note that
this reduces the size of the output cube as specified by NSAMPLES.
That is, if NSAMPLES=200 and SINC=2, the output cube will have 100
A line increment to use when extracting from the input cube.
This effectively skips lines. For example if LINC=2 and LINE=5
the output cube would contain lines 5,7,9,11 and so on. Note that
this reduces the size of the output cube as specified by NLINES.
That is, if NLINES=200 and LINC=2, the output cube will have 100