The peri-urban interface (PUI) is a social, economic, and environmental space where three systems (agricultural, urban, and the natural) are in constant interaction. The peripheral areas of the urban settlement have been defined, conceptualized, and delimited in various ways. It began in 1940s, when changes in the surrounding areas of the city came under increasing attention from spatial disciplines, (urban geography) in western world. The urban geographers focussed on investigating the processes which were shaping the urban peripheries, the place where urban and rural activities met. The term urban fringe was first used by American geographers and by 1940s and 1950s, it was widely adopted in the academic literature for the transition zone between city and countryside (Johnson 1984). Soon the complex functional relations and heterogeneity of dynamic social structure of the urban fringe set to originate debate on its physical and conceptual boundaries.