The minimum value of the index performance indicator further represents the minimum number of {HEAD ~ grid cells} that overlap with {TAIL ~ any particular geometric shape} 
The minimum value of the index performance indicator further represents the minimum number of { HEAD ~ grid cells } that overlap with { TAIL ~ any particular geometric shape }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL