Research on the Division Methods of Spatial Boundary in Urban-rural Fringe

The definition of urban-rural fringe has not uniform theory and method.It was found that the combination of the qualitative and the quantitative was the main model in the definition methods at home and abroad.The principle and basis for defining urban-rural fringe were determined.Taking Beijing as an example,using towns as the basic unit,indices were selected from three aspects of population,land use,landscape to construct the index system.The spatial boundary of urban-rural fringe was defined by using gravitational model.