Why crop?

There is variability between multiple images of the same product.

For example, in the below case, where you would want to take a crop of the southern hemisphere, you can see there are 4 different areas. Given the probability distribution of this particular subset of images, we can choose to use the one with the most occurrences and let the others underflow/overflow. Undefined pixels are left black.

images/goes15$ src/lrit/intersect ./sh/*.lrit | sort | uniq -c
     39 crop = [ -1864, 897, -19, 1003 ]
   1164 crop = [ -1864, 897, -19, 1045 ]
      3 crop = [ -1865, 896, -21, 1001 ]
    140 crop = [ -1865, 896, -21, 1043 ]