Greenland (both larger) are generally considered to be continental landmasses rather than islands. Three-quarters of Greenland is covered by the only permanent ice sheet outside Antarctica. With a population of about 56,480 (2013), it is the least densely populated territory in the world. About a third of the population live in Nuuk, the capital and largest city. The Arctic Umiaq Line ferry acts as a lifeline for western Greenland, connecting the various cities and settlements. Greenland has been inhabited off and on for at least the last 4,500 years by Arctic peoples whose forebears migrated there from what is now Canada.
City proper offices. These questionnaires ask for the country-specific definition of urban areas, rural areas and city proper. In its glossary, the Yearbook defines "city proper" as "a locality defined according to legal/political boundaries and an administratively recognized urban status that is usually characterized by some form of local government". In its data however, the United Nations Demographic Yearbook affords the individual countries considerable leeway over the definition of "city proper". The table titled "Population of capital cities and cities of 100 000 or more inhabitants" provides several country-specific definitions for "city proper" that diverge from the provided definition: These definitions are