Motivity of Spatial Urban Expansion by Cellular Automata Model——Taking Analysis of Wuhan Spatial Urban Expansion as an Example

This paper puts forward three CA models: expansion\|based state CA model, axis\|based traffic CA model and advantage\|based environment CA model, designs six conversion rules:surround filling,expansion growth,transportation extension,transportation conection,transportation atraction and advantage growth. The simulating results shows that the urban spatial growth is presenting the tendency of growing into an organic whole from urban to subur