If you are getting ‘out of memory’ errors, then that means the interferogram you are trying to unwrap is too large. One way to do the unwrapping of a large image is to use the tile option in SNAPHU, but you need to change the parameters to include some overlap between the rows and columns. The GUI image that you show will use 10 rows and 10 columns of tiles. I would recommend the row overlap and column overlap each be at least 100. Generally, you will also get better results from the “SMOOTH” mode instead of “DEFO” mode.