Making use of knowledge presentation system and reduction algorithm in the theory of rough set, choosing in the study area tree height factors closely related to site factors as decision attributes, and taking altitude above sea level, parent rock, slope, slope site, soil type, soil level thickness as term attributes, the paper set up a site type classification decision table after the dynamic classification of decision attributes and the value dispersing of all sorts of decision attributes, and calculated the depending tolerance and relative reduction of decision attributes, thus defining cla...
