#?-*-?coding:?cp936?-*-
import?arcpy
from?arcpy?import?env
from?arcpy.sa?import?*

arcpy.env.workspace=“C:/Users/dqjcs/Desktop/TM“
#?Set?the?extent?environment?using?a?keyword.
arcpy.env.extent?=?“MAXOF“
#?Set?the?extent?environment?using?the?Extent?class.
arcpy.env.extent?=?arcpy.Extent（109.00974830.489242109.765348?31.374482）
#?Set?the?extent?environment?using?a?space-delimited?string.
arcpy.env.extent?=?“109.009748?30.489242?109.765348?31.374482“
fcs=arcpy.Lis