It is influenced by many factors such as nature, economy, history and society. With the development of cities, modern cities are formed and developed. According to the requirements of various functions on environmental, social, technical and economic conditions, in order to avoid the interference between industrial production, transportation and residents' lives, facilitate production and environmental protection, and make rational use of land and natural conditions, the city is divided into several functional areas according to certain functions.
Big cities in capitalist countries are generally divided into central business district, administrative district, industrial district, cultural (entertainment) district, residential district, warehouse dock district, recreation district and suburb.
The zoning of small and medium-sized cities is relatively simple or not obvious. Industrial area, residential area and commercial area are the basic functional areas of various cities, but sometimes the boundaries of each area are not clearly defined. The rational layout of urban functional areas is of great significance for promoting production, facilitating residents' lives and protecting the urban environment.
City grade
Classification (by urban resident population)
The standard of city scale division is determined by the Notice on Adjusting the Standard of City Scale Division. [1] clearly put forward the standard of city division, that is, the new standard of city size division takes the resident population of the city as the statistical caliber, and divides cities into five categories and seven grades: small cities, I-type small cities, II-type small cities, medium cities, big cities, I-type big cities, II-type big cities, megacities and megacities.
Cities with a permanent population of less than 500,000 are small cities, of which 200,000 to 500,000 are first-class small cities and 200,000 to second-class small cities;
Cities with a permanent population of more than 500,000 and a population of less than 6,543.8+0,000 are medium-sized cities; ?
Cities with a permanent population of more than 6.5438 million and less than 5 million are big cities, of which more than 3 million and less than 5 million are type I cities, and more than 6.5438 million and less than 3 million are type II cities;
Cities with a permanent population of more than 5 million and less than 6.5438+million are megacities;
Cities with a permanent population of more than100000 are megacities.