On the Difference of Megalopols' Levels—A Study Based on Som

Because different social economy development level influences exists,the megalopolis interior should exist more remarkable differences.Based on review on study of megalopolis,this article discovered there are very few about interior differences research inside megalopolis.Therefore paper carries on recognition,the classification of Xiamen-Zhang zhou-Quanzhou megalopolis using SOM nerve network,and further unifies the core-area,the gathering-area,the proliferation-area theory,and obtains remarkable difference in whole and in part inside explored Metrdoplis.