1. In Australia, urban areas are referred to as "urban centres" and are defined as population clusters of 1000 or more people, with a density of 200 or more (...). (Google)
2. Immigrants are changing the face of Canada's largest urban centres, according to a new report of immigrants in metropolitan areas.(Google)
3. Analysis reveals significant differences between Switzerland's urban centres as regards utilization density and sociocultural mix. (Google)