ABSTRACT
The uncertainty index U, derived from Shannon’s entropy, is used to measure the diversity of patch cluster at a given hierarchical level within a Voronoi cell. The definition of U is
U ¼ � X ai
A
� � log
ai A
� � (13)
where ai is the magnitude of a patch and A is the total magnitude of all patches connected to a common local core patch at a given hierarchical level. A reaches its maximum value when all patches have the same magnitude.
