The big city is known for its superior human concentration and spatial sprawl, which testifies to its economic importance on a regional or even national scale. They are home to the headquarters of financial and commercial institutions, as well as regional and even national government departments. As a result, they have a good infrastructure.
A small town is always under the economic and political sway of the big city. Its population is smaller than that of the big city, but it manages the needs of its rural hinterland.
The country is a territory that encompasses cities and the countryside. It represents them internationally from a legal and political point of view.
It depends firstly on which country laws, but an universal decision is by population. As it has a significant role of population, you can have some hospitals, schools, parks and residences.
However, an UN concept about big cities, are the megacity, which is the cities that the entire metropolitan and central area are composed by more than 10 milions inhabitants, e.g. São Paulo, New York, Moscow or Istanbul
Hello! Tradicionality have the definition come here our time for begin about numer habitants, to exist with mega cityties, citiesbigers, o towns. The definition oficials, are: onu-habitat, page. Greetings!