The Definition and the Measurement Method of Urban Sprawlin Western Countries

The "Urban sprawl" is a big problem that from 1960s western countries have had to deal with. But what is "Urban sprawl" and how to measure it different scholars of different schools have different points of view. Based on analysing the definition of urban sprawl by western scholars systematically, the author gives a general definition of urban sprawl. The author points out their limitation and applicability.