it was connected to the core of the contiguous area by roads and is within 2.5 road miles of that core, or within 5 road miles of the core but separated by water or other undevelopable territories. Another territory with a population density of fewer than 1,000 people per square mile is included in the urban fringe if it eliminates an enclave or closes an indentation in the boundary of the urbanized area.<ref></ref/> See also Boomburb Commuter town Desakota Edge city Edge effects Exurb Habitat Habitat destruction Microdistrict Natural landscape Prime farmland Restoration ecology Suburb Wildland–urban interface References External links Countryside Agency of England's online research library of urban rural fringe 'Case Studies' of the Urban Rural fringe for students Kay's Geography: Kingston Park - retail change at the edge Urbanization Environmental terminology Environmental design Sustainable urban planning Urban planning Sustainable design