exactly how a sampled location is split. The divisions tend to be arbitrarily survyed and resurveyed when redivided. It's found in the place of framework of reference.
a way by which a place to-be sampled is sub-divided into smaller obstructs that are then chosen randomly after which once again sub-sampled or completely surveyed. This process is usually made use of when a complete framework of reference just isn't open to be properly used.